Looking for solar info UPDATE

BFL13 wrote:

suprz wrote:
We are just looking for a small affordable solar system. This would be used to recharge a GRP 31 deep cycle battery ONLY. We just want it for lights and maybe rechargeable items. What would be good for wattage? 100 watts? 50? Pcm controller? We will use the generator for all the power hogs onboard. Thx

In May at 49N sunny all day I measured an AH haul of 56AH with a 130w panel lying flat. That would bring your battery up from 50% SOC

However---
1. You will be using your battery all day too,
2. It is not sunny all day every day
3. It is not May all year
4. An RV has wheels so you will not be at the same latitude all year.

So it is a total WAG, but 200w flat might be enough most times, and you do have a generator for recharging via converter if not enough sun at times.

You can use a PWM controller with the 200w. An MPPT will only do a little better (maybe!) and will likely cost more.

Good answer. We spent 4 days at Lake Havasu and had minimal gen time for microwave. Batteries recharged each day for lights, water pump, furnace fan, and a couple of hours of satellite receiver and television. Batteries were recharged every day.