Adding a solar panel
I am ready to add a solar panel to my 20 TT. The trailer came with a 100W Renogy panel. I am thinking I would like to add a 100W or 200W panel. We don't have any special electrical needs when dry ...
Forum Discussion
Controller voltage limit is by total Voc. Voc of a typical 12v panel is 22 volts. Two in series will be 44 volts, and that is at 25C/77F. In the cold the Voc can be higher, so be sure what your controller limit is.
With them in series you will be needing MPPT doing "24-12" (they have a buck converter in them). Tracer, eg has 100v limit that might really be 90 --confusing write up on that. Early model Eco-worthy 20 amp MPPT like mine has 40 volt limit so I can't use it with the 12v panels in series. Ok with them in parallel. Later model Eco-Worthy has a 50 volt limit, so you could use that with two 12s but not three.
With them in series you will be needing MPPT doing "24-12" (they have a buck converter in them). Tracer, eg has 100v limit that might really be 90 --confusing write up on that. Early model Eco-worthy 20 amp MPPT like mine has 40 volt limit so I can't use it with the 12v panels in series. Ok with them in parallel. Later model Eco-Worthy has a 50 volt limit, so you could use that with two 12s but not three.
