Alphacarina
New Member
- Joined
- Feb 22, 2021
- Messages
- 214
If 8 panels at 12 volts equals 24 panels at 48 volts, something is seriously wrong . . . .
Don
Don
4P6S, 2.4 kw would indicate that he's now at 24 panelsyou started with (9) 100W panels and now have (12) 100W panels.
I missed that along the way as the first post states:4P6S, 2.4 kw would indicate that he's now at 24 panels
I missed that along the way as the first post states:
" I wired up 12, 100w panels and now have 2 parallel strings of 6 panels in series."
Lets take a look here. How are they wired? Have a pic?since I switched over to these agms
...I think you would see a huge increase in performance if you switched to lithium
Don
In the Settings menu, check the value of parameter 36: PV charging current. Should be at default setting of 80A. Someone else had a similar problem and theirs was set to 8A.
So it was a charge controller setting not a wiring issue?
One thing to note, now you’re running in strings series if a single panel of a string sees shade it’s affects the entire string. Thus if you have 6 or 8 panels per string, one shaded will have a pretty big impact. If your 12v system had each panel wired in parallel shading plays a much less impact.
Yes. One way is to slightly deform the MC-4 internal electrical connectors. That outside barrel on the female side, may not be engaging good with the male pin connector. You'll feel a definite resistance, slight but noticeable, just before the clipping of the connectors, where the barrel is sliding over the pin. Also, take some copper paste and paint it inside the barrel. That's another way. If it's working now, I suggest adding the copper paste.Ok so continuing troubleshooting this thing.
...
I disconnected the mc4 connectors from the combiners that I have at the box (parallel) and tested each one. Both pairs were at ~125v. Interestingly enough, I tested voltage at the inverter PV input. 6.1v DC (with nothing connected to PV input).
I connected the mc4 connectors and now the inverter says PV input voltage is 112v and making 2amps. Maybe the connection wasn't good at the combiners?
Seems good now.
I agree (see above post). This is the problem I had with the FLA's. I used those 5amp chinese balancers (they are about $18 each), 3 of them, but I couldn't find a bullet-proof option. So I split the difference and went to a 24v config, and use the milspec Sure Power.The batteries in the string may be unbalanced. The 'most full' one will limit the current through the string. Monitoring the individual battery voltages may offer a clue.
When you had the batteries in parallel unbalance was not an jssue.
this thread is nearly 2 years old.Yes. One way is to slightly deform the MC-4 internal electrical connectors. That outside barrel on the female side, may not be engaging good with the male pin connector. You'll feel a definite resistance, slight but noticeable, just before the clipping of the connectors, where the barrel is sliding over the pin. Also, take some copper paste and paint it inside the barrel. That's another way. If it's working now, I suggest adding the copper paste.