Solar battery charger

I installed a Knife Disconnect switch on Both Batteries in storage . No problems Look on Amazon . Wirth Co. # 20138 . Keep water in them . Good luck

10w for $110?

60w + controller is $120 at solarblvd.com
Ok you need some wire and hardware to connect and mount the thing.

If you want to make your life easy buy a ready to go 10W solar from one of the maintainer companies. The price will be a little over $110. You are not looking to charge the batteries just maintain them. I have been running BT JRs, .75A, on everything I own and have never had a dead battery and have never had to add water. I froze a battery two years ago because I forgot to plug in the maintainer and that mower battery had been borderline for the previous year. Anything larger is just over kill and these $110+ unit are plug in and play then forget about it until it is time to go.
Randy

LetsRV
You're not alone in this situation. Many folks end up with dead chassis batteries while their coach is stored and, there's no shore power to keep things topped off. Now, based on what you're saying, it sounds as if you may have plenty of sun to utilize a quality solar panel. There's only a zillion of them on the market. You can get on the net and, look up "solar for RVs" and you'll get a ton of sites that will sell you anything from a 5 watt panel to a 200watt panel and all the gadgets that go with them.

Every coach, has some sort of "parasitic" draws on both sets of batteries, when parked and not running and or, not on shore power. So a solar system is a good thought. ETA engineering, on line, is a good source for RV systems. There's quite a few more. But, in my opinion, for what it's worth, you'll need at the very least, an 80-100 watt system to, keep your chassis batteries, up to snuff while it's in storage.

Now, once they're up to full capacity (the batteries that is) not that much is needed to keep them up. But, if you manage to park your rig with less than fully charged chassis batteries, a system of that size will have no issues at all, bringing them up to full capacity. Then, due to the intracacies of the "Charge controller", (a fancy term for voltage regulator), the charging of those batteries will taper off, as they approach full capacity.

At that time, even a 100 watt system will become a "trickle" charging system. Hope this helps some.
Scott

All I want to do is keep a charge on the chassis batteries so I can start the coach. It is a two battery set-up.

I don't need to charge the house/coach batteries. Just want to set a solar panel in the window and trickle charge the chassis batteries.

I would think a DP has two rather large batteries. 18w is pretty minimal. What's this thing cost? I bet you could find a 50 watt panel for not much more money.

I recommend about 80 watt panel and a controller to charge the house and a Trik-L-Start combiner if your RV does not charge the chassis when plugged in.

Forget that 18w toy.

Hi,

18 watts for how many amp-hours of battery bank?

Materials for a solar system run about $2 per watt.