15 watt solar panel
I have a friend that bought a "15 watt battery solar charger kit" at a garage sale and he wants me to install it for him on a trailer with two 12 volt group 24 batteries. He is just going to use it to...
Forum Discussion
With 2 GP24 batteries there is no need for a controller with a 15watt solar panel. The 24.5 volts you are reading is open circuit voltage, not a problem. That panel probably does something like 0.9 Amps at 17.5 volts (i.e. 15 watts at Max Power point). 0.9 amps barely above 0.5% of battery capacity so no danger of damaging the batteries. Keep the batteries wired in parrellel and disconnected from trailer as that solar panel will not keep up with parastic loads.
