Polishing up my Solar System
So I currently have 300w(2 each 150w panels), a Samlex 30a Controller. It feeds 4ea. 6v batteries in series and paralleled. My rig came prewired for Solar. It has the Samlex panels and the Samlex w...
Forum Discussion
Details, please.
12V panels, alright.
Are they MC4 connectors? If so, you can use MC4 Y-splitters to wire 3 panels in parallel.
As noted, wire gauge to controller (especially in parallel) is distance-dependent. May or may not need to go #8 in parallel. At some point you might lose too much voltage in existing thin cable - assumption here again, likely you have #10 cable - and controller won't get enough for Absorb stage. It WON'T hurt to go #8 in parallel, and with MC4 (assuming again that your panels are MC4) this is easily done.
In series you don't need #8, but to wire panels in series you need MPPT.
28A into 30A PWM controller would be cutting a little close. OTH, 30A MPPT will easily take 30-35A.
12V panels, alright.
Are they MC4 connectors? If so, you can use MC4 Y-splitters to wire 3 panels in parallel.
As noted, wire gauge to controller (especially in parallel) is distance-dependent. May or may not need to go #8 in parallel. At some point you might lose too much voltage in existing thin cable - assumption here again, likely you have #10 cable - and controller won't get enough for Absorb stage. It WON'T hurt to go #8 in parallel, and with MC4 (assuming again that your panels are MC4) this is easily done.
In series you don't need #8, but to wire panels in series you need MPPT.
28A into 30A PWM controller would be cutting a little close. OTH, 30A MPPT will easily take 30-35A.
