Higher voltage solar panels?

15 amp SunSaver would work but would clip power to 15 amps. $200
TS-MPPT-30 would give full power but cost is about $350.

I will let the others list the low price options.

Check out the Outback brand of controller. The only downside is having to buy a more expensive controller.

I run twice that voltage with my 60a controller.

Hi,

Make sure there is shade free room on the roof for the panel.

Tristar MPPT 30 amp unit would be a nice fit.

Is 56v a "48v" panel? Some, not many, controllers will do 48-12 to a 12v battery.

Advantage low amps on the panel to controller wire path, so the wires can be thin. Disadvantage, the lower efficiency bucking from 48-12 in the controller.

With the panel free it is all math to see if the controller cost makes the whole set-up "worth it"

Stick houses use 48v and there are now small but useful 48v inverters they get for them. Don't know a lot about it--might be useful in an RV?

Hi BFL13,

Those small inverters are all grid tied. Not too useful for an RV.

Get it for free? Go for it. The Rogue 30a, Morningstar 30a, the Midnight Kid 30a MPPT controllers would all handle it. They run between $300 and $400 but those panels are not cheap either. You should see 20-25a from the combo.

West

I thing the clipping by a MS 15 would be considerable but a 20a MPPT controller that could handle the voltage would probably not see that much clipping in a flat mounted panel. I think the Rogue 20a MPPT is $250 and the Tracers are less than that.

yoosmart

I recommend the BN series, as they are fully adjustable. I just bought the 3215BN with remote. Can't speak to it's reliability, yet, but hey, why should I be the only guinea pig?

3215BN w remote

2215BN

correction by Jim!

Actually a high voltage panel with an MPPT controller works very well. We find it produces usable current when a "12V panel" produces nothing. We have a 185W hooked up to a Morningstar MPPT Sunsaver.