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RV Tech (23)

Thursday, 22 August 2019 10:58

New Locks Are Key to RV Security

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Ring a bell? It’s probably stamped on the key to the storage compartments on your RV. It’s probably also stamped on the key to the storage compartments on the RV next to yours, and on the key to the RV next to that one.

That’s right: Those CH751 locks aren’t so much for security as they are for keeping all your stuff from spilling out as you bounce down a highway or a trail that would pop a door open without the locks.

The good part is that if you lose your CH751 key, you can always buy another online or at an RV center. The bad part is that anyone else can buy one, too.

Here’s more bad news: RV entry door locks aren’t much better. The upper lock labeled “M” uses a master key—a universal key that anyone can get. The lower lock, which is a deadbolt, uses a different key, but it’s also identical to the deadbolt locks on many other RVs.

In other words, as a security measure, most standard RV locks are worthless.

Where To Get Secure Locks

You can tell yourself that the RV community is pretty honest—and that’s true—but replacing a cam lock on a storage compartment isn’t hard, and neither is replacing a door latch. Doing both will keep out the people you don’t want in your camper when you’re not around. That’s an especially good idea if you have valuables in your RV—more likely perhaps for full-timers than for vacationers, although these days, who doesn’t have expensive phones, tablets, computers and other electronics onboard?

Go online to find locks that are keyed alike to replace CH751 locks. Be careful when buying sets of cam locks. Some manufacturers promise one-key practicality, but they don’t tell you that everyone else buying the locks has the same key code. If keys aren’t unique or don’t have one of several key codes available, look elsewhere.

Shoprvlocks.com offers cam locks for as little as $11.95 each, and a 5 percent discount if you order five to nine locks. Possible key codes are 200—one heck of a lot better than a universal code. The locks offer a choice of diameters and lengths, as well as cam length and bend options. You can step up to a tubular cam lock for $15.99, with 10,000 key codes possible, or what the seller calls a pickproof magnetic cam lock, with 1,500 possible magnetic codes, for $23.99 each.

Etrailer.com sells Global entry door latchs with matching keys. It can match the key to the entry door with the key to storage cam locks—if they are all placed in the same order. Global’s locks use 91 different key codes. Cam locks are about $11 each. Entry locks require buying a new entry latch with matching key codes. Entry latches are about $35.

A costlier but more convenient alternative is an entry door latch with keyless entry. The latches from rvlock.com are good examples. Choose your own combination for the touch pad, or add a fob and open remotely—convenient when your hands are full with supplies, dishes from cooking out or a child. A key opens both the latch and deadbolt should the battery-powered combination pad fail. The company also offers locks for storage and luggage compartments, and a central control for all locks. Prices range from about $200 to $260 for entry door latches.

Lock Replacement Is Simple

Cam locks are secured on the inside of the door with either a U-shaped clip that is forced over the lock’s barrel, or with a hexagonal nut that threads over it. Both are easy to remove with the door open.

Check out this video to see how the locks are removed and replaced. You need no special skills and no special tools. And you absolutely don’t need an expensive locksmith. Figure on a hammer, flat-blade screwdriver, pliers and adjustable wrench—all items that you probably have in your toolbox.

Entry door locks come off easily by removing interior screws. Installation is simply a matter of reversing the process. Make sure you buy a latch assembly that fits your motorhome or trailer, since sizes and styles vary.

Friday, 26 July 2019 19:54

Finding The Internet While On The Road

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Being connected is how we live. We go online to get directions, do our banking, shop, share with friends, keep tabs on family, play games, access music, and watch TV or movies.  It’s also been reported that teens need Internet access just to breathe, although evidence is merely anecdotal.

Setting up Internet connections in an RV is different from what’s needed in a stationary home.

You probably look for campsites that have Internet access. You’re OK if the campsites are hardwired, although speeds may be slow. If they’re not wired, and you must rely on the camp’s WiFi, you’ll probably be tempted to take a less desirable campsite to ensure a strong signal, but the feed may be slow anyway.

The only other way to find free access on the road is at libraries and some businesses with free WiFi, typically fast food joints and businesses with waiting rooms. That may help you keep tabs on your email, but it’s not an especially secure way to pay bills.

Much better is having your own data coming in or at least being able to enhance the camp’s signal.

What You Needrv signal booster

You spend a lot of time outside the RV while camping, so the signal needs to be strong not just inside your RV, but also nearby. Here are the things you’ll need to reliably access the Internet from your RV and campsite:

  • A data source for connecting to the Internet.
  • An antenna.
  • Signal extender.
  • Some way for devices to link to the signal.
  • Power cable for the antenna.
  • Router and Ethernet cable if you want to connect a device physically.

Choosing a Data Plan

On the road, you can get data delivered reliably to your RV only by paying for it. You can tap that data with the proper equipment, but you’ll probably have to increase the maximum data available. Tablets and computers, streaming services and game consoles gobble up data.

If you vacation only a month or three each year, you can buy only as much data as you need the rest of the year and pay for extra data in the months you travel. You will need extra especially if kids are streaming music and movies, watching TV, gaming and chatting. Extra data also is advisable if you work online from your RV or watch a lot of TV.

Beware data plans labeled “unlimited.” Only in our age of steadily decaying consumer protections could something be called unlimited and still incur extra charges for data—but some data plans do just that. Read the fine print.

Antennas, Accessing the Web

An antenna to pull in a signal is often roof-mounted for optimum reception. Omni-directional antennas take different forms, from painted metal to plastic-coated, and sometimes encased in a larger plastic enclosure. Antennas add height, but no more than a hooded fan. Still, you’ll have to avoid damaging an antenna on overpasses or branches. Position an antenna away from other roof-mounted accessories to avoid interference.

Exterior antennas are designed to resist dust and water intrusion from spray, but even enclosures designated IP65 will not resist water jets, so take care when washing. Seal any mounting holes or openings for cables with Dicor or a sealant approved by your RV manufacturer.

Some RV antennas are also a signal extender. They strengthen incoming and outgoing signals. With an extender, you can be farther from a cell tower and still get a usable connection. If you have no data plan, an extender amplifies WiFi signals from RV parks and businesses.

Some tablets and any smartphone can link wirelessly with a password, and many smartphones can also serve as a hotspot, allowing Bluetooth-enabled devices to link through the phone to access the Internet. A separate portable hotspot (often called a jetpack) costs $200 or less. The optimum solution for multiple devices, or if you want an Ethernet connection, is to install a router to distribute the signal from the antenna. Combination signal extender/routers also are available.

Channel Bonding

Channel bonding isn’t necessary, but it can help prevent dropped calls and buffering while streaming. It helps maintain connectivity when you are beyond official coverage zones—ideal for boondocking. Uploading and Skyping also will be stronger.

Bonding combines any channels on which you receive data to produce one stronger signal that’s sent over your own virtual private network (VPN). So, if you have a cell signal, an Ethernet signal and a WiFi signal, or, say, an AT&T and a Verizon signal, plus a WiFi signal from the RV park, bonding will enjoin them on the network side and result in faster throughput. An example is Speedify. It’s available in one-year subscriptions if you’re full time or close to it, or monthly if you only vacation in your RV.

Photo Credits: weboost.com

Monday, 01 July 2019 18:57

Adding a Backup Camera

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Older RVs and tow vehicles may lack some of the newest electronic accessories, including one of the more useful innovations, the backup camera. With wireless technology, it’s actually quite easy to add one.

The rear of a travel trailer is a great spot for a backup camera, but it’s a place not likely to have one. A backup camera will make backing into a campsite and just turning around much easier. It also will make highway driving easier because it can serve as a rearview mirror, displaying what’s behind your trailer.

A wireless setup is ideal for the rear of a trailer—the camera and sending unit behind the trailer, and the viewer inside the tow vehicle. You also can get wireless systems that add cameras to the blind spots of trailers or motorhomes. Wireless range may be as high as 70 feet.

Wired cameras for trailers with up to 50 feet of wire are available, but you must decide if you want to do an installation on that scale. Remember, you would have to wire the length of the trailer and the length of the tow vehicle, plus connect at the hitch.

A wired camera is better used on a motorhome or for mounting a camera to work only for a tow vehicle. Wired units generally are cheaper but take more time to install. A camera on the tow vehicle itself will help when driving the truck alone, and maybe during trailer hitching, but it won’t help you see behind the trailer.

Costs Range Widely

You can get a camera for less than $20, but you’ll probably have to supply a monitor, and the image quality will be low, especially in extreme lighting conditions. Kits with both camera and monitor range from about $60 to the mid-$200 area for wired types, and from about $100 to $400 for wireless, with the monitor size and features affecting the price. Wireless systems with extra cameras for blind spots, useful on large motorhomes and trailers, are available for about $500 but can top $900.

Available Features

Mounting Method - Cameras can be mounted by drilling through your vehicle’s or trailer’s body, by using pressure-sensitive tape, or by mounting atop or in place of the license plate frame. 

Display Type - You can buy separate camera and monitor, camera-and-monitor kits, or cameras that beam their signal to your iOS or Android smartphone. Displays typically increase with screen size, 4.3-, 5- or 7-inch. Some displays replace your rearview mirror, with widths between 7 and 10 inches. They work like traditional mirrors when not powered up.

Sensor Type - CMOS sensors provide a lower-quality image, but they’re cheaper. CCD sensors provide good images even in low or bright light, but they cost more.

Reverse Image - The view looks like what you see in your rearview mirror—highly desirable.

Auxiliary Lights - Some cameras get help at night from small lights. Infrareds are best.

Lane Departure Warning - Another feature not available on earlier model vehicles, lane departure alerts you if you stray into another lane.

Recording and Playback - Look for this if you want a record of your driving.

Backup Grid - Lines guide you in backing up straight. Original equipment cameras typically have this feature.

Instant Power - As on new vehicles, the camera goes on as soon as you shift into reverse.

DIY or Installed?

Experienced do-it-yourselfers can probably handle installation, but bigger wired systems may be better left in the hands of a shop. You may balk if your camera requires drilling; make sure it properly seals out water to prevent rust, and use a quality drill bit from a name brand, such as Black & Decker, Dewalt or Milwaukee. You may have to splice into your vehicle’s wiring with some systems, and definitely for automatic power-on, so make sure you’re comfortable with that.  Expect to pay a shop’s normal hourly rates for installation.

Friday, 28 June 2019 18:34

Old Technology That’s Still Useful in an RV

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We all love the latest gadgets, and more importantly, what they can do for us. Few of us want to live without cell phones, GPS-based directions or rechargeable devices.

There are, however, a few examples of old technology that remain useful in an RV. 

Duct Tape

Now, some of you may think of duct tape as the greatest invention of all time. That’s probably the wheel, but the silvery adhesive aid is one simple, inexpensive, versatile invention. It’s great to have a roll on hand.

And why not? In World War II, this water-resistant, strong tape was used to keep ammo dry by sealing ammunition boxes. When the Apollo XIII moon mission was crippled by an explosion, it sealed up the makeshift oxygen system that astronauts cobbled together and helped to save their lives. Anything that helped win the world’s biggest war and bring three endangered astronauts back from the dark side of moon has merit.

You’ll appreciate duct tape if a piece of trim comes loose and you want to keep it from flapping as you drive. And you’ll thank the stars that you have a roll if a fender bender has your bumper cover dragging. (People have held bumper covers up for months with duct tape.) It will also at least slow a hose leak.

You also may want to buy a role of quality gaffer’s tape, which is used on movie sets. It’s cloth-backed but unlike duct tape has no plastic backing for water resistance. Gaffer’s tape, which delivers a strong bond, leaves no or reduced residue, making it great for interior use.

Bungee Cords

Like duct tape, bungee cords are great in a pinch. The elastic cords, with metal or plastic hooks on the ends, come in different thicknesses and lengths.

A carefully installed bungee cord also will hold up that bumper cover. It will keep cabinet doors closed when a latch beaks. A bungee cord will secure bikes to a rack and stop that annoying rattle from a loose item in your storage area. We personally know of a case where a tiny bungee held a loose cover to the master cylinder of a poorly maintained rental truck for the length of an interstate move. Buy multiple sizes so you’ll find a cord for whatever pops up, so to speak.   

CB Radio

The days of relying on a CB radio for directions, traffic conditions and plain old chatter are long gone.

But CB radios—that’s Citizens Band, for the uninitiated—can be a useful emergency tool. Most police no longer monitor CB transmissions for emergency calls, but those that do still listen to Channel 9 are probably in remote rural areas. If you’re trying to deal with a flat tire where there’s no cell tower, a CB radio may do the trick.

Paper Map

Electronics rule where road maps once were king. But the accordion-fold paper map, spread out across your table at the local diner, or a good road atlas will give you the big picture one heck of a lot better than your tiny cell phone screen will. And where there are sporadic or no cell phone signals, a paper map is all you’ve got. It’s cheap and takes little space. Keep one handy.

Alkaline Batteries

Throw-away batteries are passé, but in an emergency, they can be a godsend. For one thing, they’ll last longer than the power in a rechargeable flashlight. If a mechanical issue prevents recharging, a flashlight with a couple of long-lasting alkalines will keep you going—just like that bunny on TV.

Friday, 07 June 2019 20:18

Dinghy Towing Requires A Careful Choice

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Having a vehicle smaller than your motorhome at the ready when you’re set up at a campsite is a major convenience. It’s easier to drive a smaller vehicle to get groceries, visit a friend, see a movie or venture off road.

If you camp in a fifth wheel or trailer, secondary transportation isn’t an issue. You just drive the unhitched tow vehicle.

For RVers driving a motorhome, it’s a different story. Unless the motorhome is a toy hauler, you have to tow a vehicle. Dollies and trailers can be difficult to maneuver, and trailers add weight—and work. That makes flat towing—also called four-down or dinghy towing—the best solution.

Finding a vehicle that won’t be damaged by rolling along on all four wheels takes work. Only some vehicles can be flat towed, but quite a few are affordable, especially when used. Every vehicle will need a tow bar plus wiring and braking add-ons.

Transmissions Challenged

A dinghy vehicle’s transmission and transfer case must continue to be lubricated as it rolls with the engine off. There’s no absolute rule here. Some vehicles can be towed thousands of miles, some a few hundred and only below a certain speed. Some models may be flat towable in automatic and manual transmission models, and some in one but not the other. Generally speaking, an all-wheel-drive or 4-wheel-drive vehicle must have a transfer case that can be shifted to neutral. Take note: With electronically controlled transmissions and transfer cases, traditional rules don’t apply.

Edmunds.com, a reliable site that reviews and lists equipment available on new and used vehicles, says that among the things you must know to flat tow are whether to pull fuses and which ones, what must be switched on or off, how to position the shift lever, and how often you must stop and run the engine for lubrication (sometimes as often as every six hours). In general, ignition switches are placed in the “accessories” position so the steering wheel will turn.

Still, you have to know which vehicles are flat-towing approved.

Dinghy-Towable Vehicle Lists

First, decide the kind of vehicle you want. Do you just want a car that can be towed, then driven into town? Or do you want an all- or 4-wheel-drive SUV or truck that can take you off road?

Then consult a list, such as the list from Motorhome.com, which has dinghy vehicle guides going back to 1990. Downloads are free. Goodsam.com also publishes the list. The 2019 guide lists 65 vehicles, from subcompact cars to 4-wheel-drive pickups. It tells you speed and distance limits, plus what needs to be done before towing.

Talk only to industry people you absolutely trust:

  • Dealerships. Don’t ask just any car salesman. Let’s face it: Some salesmen are knowledgeable and some know less about cars than your dad taught you when you were 10. A few just make stuff up to get sale. Even if he doesn’t offer what you need, one you trust might have suggestions.
  • RV dealership. Ask about dinghy towing but emphasize that you want a car that is manufacturer-approved for four-down towing.
  • Your mechanic. Mechanics see and hear a lot. If they have seen two or three of a model that fail even though the factory approved them for dinghy use, they’ll tell you. And if they don’t know, they’ll probably tell you that, too.

Check the Owner’s Manual First

Before you buy any vehicle for dinghy use, check the owner’s manual for that make, model and year. Edmund’s says an owner’s manual will explain whether a vehicle is approved for dinghy towing and how towing must be done. “Check the manual,” Edmunds emphasizes, “then check again.” Remember: Dinghy approval for a model can change from year to year, so get the right year manual.

Owners manuals, even for past years, usually can be found online by searching “year make model owners manual.”  

Modifying for Dinghy Towing

Can you modify a vehicle for dinghy towing? Technically, yes. An RV dealer can do the work. But it’s risky. Modifications may not protect the vehicle’s transmission, transfer case or electronics as the accessories maker claims. Modifications also will invalidate the vehicle manufacturer’s warranty, so if the vehicle fails, you’re out a ton of money.

Thursday, 06 June 2019 18:51

How To Preserve RV Tires

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Many factors that influence tire replacement on an RV are identical to those for other vehicles, but one stands out as decidedly more relevant to RVs: tire age.

Why? RV tires may deteriorate before the tread wears out if they’re old. RVs travel fewer miles than daily drivers for most people, so the tread often remains high, even after years of use. Sure, some RV owners—especially nomads who live on the road—drive 10,000 miles a year. But the average RV owner drives less than 5,000 miles yearly, according to Guaranty RV Super Centers, an Oregon-based chain of RV dealers.

A 5-year-old tire may not show much wear at 25,000 miles, but what kind of shape is it in? It’s possible that a tire with half its tread will begin to show sidewall cracks, largely from the ultraviolet rays in sunlight and from atmospheric ozone, but also from the stress of heavy loads, the heat from high speed, and improper maintenance and storage.

Check the manufacturing date on each sidewall—the last (right-hand) four numbers after the DOT marking. The first two of those numbers are the month and the last two, the year. For example, a tire stamped “0110” was made in January 2010. Michelin recommends having the tires checked when they’re 5 years old.

By the seventh year, or if signs of non-tread wear show before then, consider getting new shoes. If tires check out, keep running them. When replacing just two tires, place them on the same axle at the rear.

Here are steps to make your tires last:

Maintain Proper Pressure

Go by the tire manufacturer’s inflation recommendation. Don’t overload your tires, and just as importantly, don’t underinflate. Goodyear says every pound of under-inflation decreases a tire’s ability to carry 20 to 30 pounds of payload. Goodyear recommends checking pressure when tires are cold, before and after each trip (even short ones), when TPMS indicates a problem, and monthly during storage.

Don’t Overload Your RV

An RV that’s too heavy unduly stresses tires. It also can degrade handling. Distribute contents as evenly as possible to avoid stressing just one tire. Weigh your RV while it’s loaded (and with full tanks) on a truck scale.

Rotate Tires

Tires wear more evenly and last longer as a set if they’re rotated. Including your spare in the rotation ensures that it won’t age beyond its useful lifespan. Check your RV owner’s manual, but as a guide, rotate yearly.

Keep Tires Balanced

Tires should be balanced when new or rotated to the other side. Unbalanced tires will ride roughly as they bounce.

Store Your RV Properly

If possible, store indoors in a cool, dry place. Outdoors, try to find an area shielded at least part of the day from sunlight. Unload your camper. Inflate the tires to 25 percent over the recommended maximum. Clean the tires with soap and water, but avoid sealants and dressings. Place the RV on blocks if possible. Shield the tires from sunlight with covers. It may be helpful to park on a layer of plastic between the tires and pavement. To avoid flat-spotting, move the RV every three months but not in cold weather. If tires are stored indoors, keep them away from ozone-generating heat sources.

Replacing Tires

Buy tires similar or identical to those already on the RV. Match the size and load ratings of original tires. On trailers, never mix increasingly available radials with bias ply, which are being phased out. You can use bias trailer tires even if your tow vehicle has radials.

Photo Credit: tcpglobal.com

Friday, 03 May 2019 20:03

Replacing RV Weather Strips

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RV weather seals—also called gaskets or weather stripping—are as important in warm weather as in cold, and warm weather is a much better time to replace them if you do the work yourself. Warm weather keeps rubber gaskets more flexible, making them easier to work with.

You have three very easily understood reasons for renewing weather seals before summer. Seals that are in sound condition:

  • Keep air-conditioned air in your RV and hot, humid air out.
  • Prevent water leaks from heavy summer thunderstorms and road spray.
  • Block out insects and other pests.

Weatherstripping is likely to deteriorate around entry doors, storage compartment doors, windows, operating roof vents and slide-outs.

Installation Types Differ

Some weather seals apply with glue, often (but now always) in the form of an adhesive backing on the seals themselves. The adhesive surface is exposed when you peel off a plastic or paper cover. These seals are common on entry doors.

Seals for sliders often are fastened with glue but require an application of liquid adhesive, since they typically don’t come with a pressure-sensitive backing. Some mount in tracks on the RV.

Other weather seals press into place. Many have a slotted surface that attaches to the edge of a window or compartment door, or to an upward-facing, leak-discouraging lip on the frame of a roof vent.

Finding a Proper Gasket

Seals may differ by make and model of RV, but buying more-expensive original equipment seals usually is not necessary. Several manufacturers offer aftermarket window, door and vent gaskets in a range of sizes, styles and prices. They typically have catalogs in RV stores or online charts to help find the proper fit. For instance, if you go to manufacturer Steele Rubber Products’ web page and click on slide-outs, you’ll find single and double bulb seals of varying heights and widths, seals with fins, seals with track mount, and seals with peel-and-stick adhesive, all shown in profile. Matching a seal profile usually turns up a match.

Other replacement gasket suppliers include CR Laurence, Bling-Flagship, Lightman, Minor Rubber, Perma-Fit, Trimlok and Zoro.

Simple Installation Steps

For a proper fit:

  • Watch weather seal installation videos online before proceeding.
  • Find and buy the appropriate seal, using in-store or online assistance.
  • Take photos with your cell phone or digital camera of the old seal as it was properly installed, then intermittently during removal, so it’s easier to reverse the process during reinstallation.
  • Read the instructions included with the new seal.
  • Remove the stripping.
  • Clean dirt, corrosion and glue residue from the RV surface. You may need a scraper and solvent. Take care not to damage paint and decals.
  • Fit the new gasket, then install by using pressure-sensitive adhesive, applying adhesive or pushing a seal into place, depending on type. Remember: It’s easier to curve flexible rubber seals in warm weather than in cold weather. Working in the shade will prevent excessive heat from fiberglass or metal surfaces.
  • Using a utility knife or shears, trim the seal to fit, then apply sealant to any small gaps that may result.

When buying slider seals, make sure they’re wide enough to overlap or cover the gap between the slide-out and the adjacent, stationary RV wall. That keeps out water, dust, pests and debris.

Lithium Ion batteries, or Li-ion, are a very real upgrade as deep-cycle batteries in your RV. Although more expensive, lithium ion offers a number of advantages over lead acid batteries.

Li-ion technology is young but not new. Li-ion batteries power many cell phones, laptops, power tools, consumer and commercial drones, and gasoline-electric hybrid vehicles.

Li-ion battery advantages:

  • Weigh less.
  • Are smaller compared with an equal-strength lead acid battery.
  • Don’t vent, so they can be stored in more areas than traditional batteries.
  • Maintain amperage during discharge.
  • Last longer before needing replacement.
  • Allow deeper discharges.
  • Charge faster, making them more compatible with solar charging.
  • Require no maintenance.
  • Better resist damage from heat.
  • May have smart management systems to prevent damage.
  • Use a non-corrosive electrolyte.

Li-Ion battery disadvantages:

  • Cost 3 to 5 times more than weaker lead acid battery.
  • Can catch fire if damaged.

Price versus Performance

You will pay considerably more to purchase a lithium-ion battery, but over time, costs nearly even out.

Joe O’Connor, a senior application engineer at Mercedes-Benz Energy and author of the book “Off Grid Solar,” wrote on medium.com that the initial cost per kilowatt hour (kWh) with a lead acid battery is $131. For a Li-ion battery, it’s $530—a whopping 400 percent of the cheaper battery’s purchase cost.

But Li-ion batteries cycle 1,000 times for cheaper units to 4,000 times for higher-quality cells before they fall to an 80 percent state of health, compared with just 200 to 1,000 discharges for a lead acid battery. That means they should last years longer. By the time the Li-ion battery needs replacement, its total cost is just 11 percent more than its lead acid counterpart, O’Connor’s figures show.

More Convenient, More Powerful

There’s no question about the convenience of Li-ion compared with lead acid.

Li-ion batteries require no maintenance. There’s no need to top off water as there is in the lead acid battery—a task that’s difficult when batteries are hard to reach. Skip that chore with a lead acid battery, and battery life shortens dramatically.

Lead acid batteries also fail sooner if they are discharged beyond 50 percent. A Li-ion battery can be discharged 80 percent without damage. A Li-ion battery will supply power longer on each charge than a lead acid battery will.

When a Li-ion battery is discharging, there’s much more power on tap—5 times as much available power at constant current as a lead acid battery, according to O’Connor. The available power on lead acid batteries diminishes steadily as the batteries discharge, making them far less efficient in running an RV’s electronics.

Faster Recharging

The fast charging time of a lithium-ion battery is 2 to 4 hours. That’s a fraction of the time needed to recharge a lead acid battery, which is 8 to 16 hours, depending on the quality of the battery.

A Li-ion battery is just more willing to accept a new charge—about 99 percent efficient versus 85 percent for lead acid batteries. That makes Li-ion especially attractive for solar recharging. Solar panels, like Li-ion batteries, involve a high expenditure up front, but they save money over having to recharge with a generator, which needs gasoline or diesel fuel to run and oil for lubrication. With more efficient lithium-ion batteries, a smaller—and cheaper—solar array will be just as efficient as a larger array replenishing lead acid batteries.

The Future

Batteries for off-grid use will continue to shift toward lithium-ion, with a more pronounced move away from lead acid within just a few years. Expect Li-ion prices to drop as more manufacturers enter the market, increasing competition.


Tuesday, 02 April 2019 19:59

Adding TPMS to RV, Tow Vehicle Boosts Safety

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If your tow vehicle, motorhome or trailer lacks a tire pressure monitoring system, commonly referred to by its initials, TPMS, the safety feature isn’t difficult to add. Adding TPMS is a good idea for RVers.

Losing a tire at speed is nasty business. The sudden loss of pressure—a blowout—can cause a vehicle to swerve or even to roll over. Tires that fail can also shred, and that can cause considerable damage to RV bodywork, especially aluminum bodies.

Losing a tire in the middle of nowhere on a long trip is no picnic, either. Getting a truck to come in and jack up any of your vehicles to change a tire is often far from instantaneous.

How TPMS Works

TPMS add-on systems basically have two parts—the sensors, which wirelessly send signals reflecting air pressure from each tire, and a wireless receiver, which gathers the information and displays it in any of several ways, depending on the system.

The monitor might display actual pressure in each tire, or it might simply show a message to check a tire, or all your tires. Individual readouts are the better choice.

Original equipment systems have monitors that are integrated into the dashboard. Aftermarket systems can’t do that, of course. They have monitors that attach to the instrument panel, on the surface or on the lower edge, or on a console surface. They’re reasonably attractive, so adding one won’t spoil your view of the instrument panel. Because they use their own batteries, there are no wires to run or connect.

Signals are sent wirelessly. Some sensors are mounted internally, which will cost more to mount because you’ll need a garage or RV center to do it. Then the tires and wheels will have to be balanced. The alternative is sensors that screw onto valve stems as replacements for valve stem caps. Manufacturers say there is no need to rebalance tires after replacing the valve caps with the lightweight sensors.

Some systems, in addition to monitoring tire pressure, monitor tire temperature and send readouts to the same monitor.

How Many Sensors?

TPMS kits come with different numbers of sensors and are priced accordingly. Four would cover your tow vehicle only, and not even that if it has a dually rear axle. Kits usually include a tool to help mount the valve-cap type sensor on the inner wheels.

It’s best to get a set that has enough sensors to read the pressure of each tire on your tow vehicle, your trailer and your spares. If your motorhome tows a dingy, get sensors for that vehicle, too. Look for models that offer, in addition to the sensors in the set, additional individual sensors or supplemental sets of two. That way you can get as many sensors as you need. You also can replace sensors that go bad. Regardless of where your sensors are, they’ll read out on the dash display you install as long as they’re compatible—the same brand and model.

Sensors are water resistant to help them hold up, a must if you’re towing a boat trailer. Screw-on sensors typically must be removed to add air to a tire, then screwed back on.


Sensors last about five years. After two years you should replace the watch-type flat batteries. Better to replace them than have them fail on a trip. Some monitors have rechargeable batteries, which don’t have to be replaced but can be recharged from the power port/lighter.

A nice thing about the screw-on type of TPMS sensors is that you can remove them while your RV is stored. That prolongs the life of the sensor and the batteries, if you remove them too.

Cost: Surprisingly Inexpensive

Costs vary by make, model and retailer. In general, a set of TPMS and temperature valve stem caps for eight wheels costs $380 to $600, including the display monitor. A set of 8 with internal mounts for wheels adds about $100. A color monitor might also elevate the price by $25 or so, but it’s useful for systems that measure both pressure and temperature.

Photo Credits: technorv.com

Thursday, 07 March 2019 20:03

Upgrade RV Roof Fans To Boost Ventilation

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Many standard RV fans are modest performers. Fortunately fans come in standardized sizes, making it easy to upgrade.

Roof vents are 14 x 14 inches in the main living area and possibly in the bedroom, and probably 6 x 6 inches in the bathroom. Even vents without fans are likely to be 14 x 14.

There are quite a few reasons to replace a fan, even if it’s working properly:

  • Increase airflow. Some fans, even the same size, can move more air. Airflow is measured in CFM—cubic feet per minute. Improving airflow helps to cool indoor temperatures. Boosting airflow in the bathroom reduces odors and prevents mold.
  • Reduce noise. Some standard vent fans are noisy—doubly irritating if they’re not efficient.
  • Add features. You can boost ease of use with a temperature sensor, rain sensor, remote control, multiple speeds, reversible blades or a rain hood.
  • Protect a pet. Leaving a dog or cat in the RV is dangerous without certain fan features.

The best way to choose a fan upgrade is to answer some questions before buying:

What’s my budget?

Standard-grade roof vent/fan replacements cost about $60 to $110 for manual models. Installation would be extra, but many RV owners can install a fan themselves. They are powered by 12V wiring.

Adding features raises the price, but significant upgrades don’t cost much individually.

A model with remote controller, electric lift, built-in rain hood plus temperature sensor costs about $240 to $300. Aftermarket rain hoods range from $25 to $75. Prices vary by as much as 50 percent for the same model, so shop around, and remember that there’s never a need to pay list price.

What color do I want?

Inside, just about every fan is colored white or off-white. The most common color choices for lids are white and smoke. The smoke lids allow a bit of extra light to enter your RV. Some fans have clear blades, admitting even more light.

Rain hoods are available in a variety of colors, but most common are white, beige, grey and black.

Is remote control worthwhile?

Some see this as unnecessary, but remote control eliminates having to reach up to turn the unit on or off, get up from your seat to change a setting, or run wiring to a wall switch. Remote control is a boon for short RVers and those with disabilities. It will add maybe $35 to the price of an otherwise similar unit.

Do I want my fan to close automatically in the rain?

Most fans shouldn’t run in the rain, but after you open manual fans and turn them on, they keep running, even if it pours. Not only would rain enter the RV, but it also would damage the fan motor. Consider a model with a rain sensor, such as the Fantastic Fan 803350. It will turn off and close when rain hits. The one problem on any fan of this type is a rain sensor may stay wet, preventing the vent from reopening and the fan from coming back on—potentially deadly for pets.

Do I want to run my fan in the rain?

If you want to exhaust air in the rain, avoid the rain sensor but get a model with a rain hood, such as the Dometic EZ-Breeze Vent Fan, about $90. It allows use 24/7, rain or not. The MaxxFan Model 00-07000k, about $300, pops open under a built-in rain hood but closes almost flat and has a temperature sensor, plus remote control. An alternative is to find a fan you like and add an aftermarket rain hood, such as the Maxxair 933067, about $50. Less expensive hoods are available. Make sure the hood you buy won’t significantly reduce airflow. The more venting the hood has on its rear surface, the better.

Must I cool a pet while I’m away?

You have to care for your pet, even if you’re not physically in your RV. The right roof fan helps.

Just as important as leaving food and water is maintaining a safe temperature—ideally below 76F, and definitely below 80F. The best way to do that is to have a vent fan running. In addition to buying a model with a hood to allow use in the rain, or installing an aftermarket fan hood, get a fan with a temperature sensor, such as the Maxx Fan Model 00-07000k. In addition to shedding rain with its built-in hood, it cycles on and off to maintain the temperature, even if you’re not there.

Do I want a temperature sensor?

Even if you don’t have a pet, you might want this feature. The fan will automatically cycle on and off if the interior temperature reaches certain levels. That kind of comfort and convenience is nice to have for the few dollars a thermostat adds. It’s available on many fans in the $125-to-$150 range.

Do I want to bring air in as well as exhaust air?

During the spring or fall, or in the evening or morning, you may want to bring air in. This would be true especially if you have limited screened windows. To do so, you’ll need a vent/fan that can reverse its blades.

How much air does a fan move?

This might be especially useful to know in bathroom fans. You can’t easily increase the size of a bath fan to improve airflow, but you can increase airflow with a better motor and more efficient fan blades. Look at the CFM rating.

How noisy is the fan?

Unfortunately, many manufacturers don’t provide noise figures, measured in decibels (dB). If the product description doesn’t include the information, call the manufacturer or email to find out. There’s no guarantee, but a better-quality, more expensive motor and a higher number of blades typically increase air movement while lowering noise.


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