Originally Posted by bigbettyblue
batteries- wired in series together
panels are wired per the instructions that came with it. Chain length pos to neg.
clean- they should be
Are you intending to have a 12v output?
Check your battery configuration. If you are connected in series, pos-neg you’d have a string that’s 48v.
Connecting your panels in series shouldn’t be a problem, but parallel is preferred since shading or dirt can negatively impact performance. Since you only have 2 panels it shouldn’t be a problem as long as they are clean and there isn’t shading from, for instance, a mini-split casing a shadow on one panel. Ignore this part for now though.
What controller do you have?
The reason I asked where you are is just to get a measure of sun hours you have. Just for the sake of calculating and supposing the panels are a flat configuration,
5 full sun hours
400w of panel
Derated 20% because they are flat (A bit of a guess)
So assuming you have a 12v system you would have only generated 133 Ah