Solar controller question
I just bought a 100 watt RV solar kit from Amazon made by Renogy. It has a 30 amp controller but all that came with it as far as instructions is a quick start guide which ,in places, says to see th...
Forum Discussion
Horizon170 wrote:
Just curious as I don't have any solar-----will this 100 watt kit keep two gp 27 batteries topped off?
Depends, on a lot of variables. But in general, no. You need, at a minimum about a watt of solar panel per amp hour of battery. Since a group 27 is about 100-110 amp hours, and you have 2 group 27 batteries, you need, at a minimum, enough panels to yield 200-240 watts. And that would be in summer time camping, with longer days, and longer charging periods. You might need 360 to 480 watts in winter, if your solar panels are not aimed directly at the sun, and are instead roof mounted on your RV. Much less efficient with low sun angle. Far more efficient if you can put them on a portable mount and chase the sun with them by aiming directly at the sun for full power capture and output. Fixed mounting isn't always best. Sometimes portable yields much more than you think.
