Bluedog225
Texas
- Joined
- Nov 18, 2019
- Messages
- 2,914
I’d appreciate a second opinion to verify my understanding.
I’ve got three 100w Renogy panels (identical but different ages) and two Battle Born Batteries (12v). The batteries will be wired in parallel.
Entire load is 12 volt man cave stuff (lights, TV, 12 volt tool charger).
Battle recommends 200 to 250 watts per battery.
I’d like to bump up my capacity to 500 watts. Therefore moving to 5 panels at 100w. (I’m going to disregard the issues related to different panel ages.). I’ll try to get similar 100W panels with open circuit voltage (22.5V) and short circuit current (5.75A).
1. If I get a Victron 150/35, can (or should) I run the panels in series for a open-circuit voltage of 112.5 and something like 4.4 amps? Or is different series or parallel arrangement preferred? I can cut it back to 4 panels and go 90V, or two in series at 45v. I don’t understand the considerations here, partucularly with regard to safety.
2. Am I right in thinking this controller can take high voltage input from the panels (up to 150V and still charge to 12 volt batteries?
3. And finally, where do I check the cold temperature volts t0 make sure I don’t exceed 150?
Any thoughts appreciated.
Thanks
I’ve got three 100w Renogy panels (identical but different ages) and two Battle Born Batteries (12v). The batteries will be wired in parallel.
Entire load is 12 volt man cave stuff (lights, TV, 12 volt tool charger).
Battle recommends 200 to 250 watts per battery.
I’d like to bump up my capacity to 500 watts. Therefore moving to 5 panels at 100w. (I’m going to disregard the issues related to different panel ages.). I’ll try to get similar 100W panels with open circuit voltage (22.5V) and short circuit current (5.75A).
1. If I get a Victron 150/35, can (or should) I run the panels in series for a open-circuit voltage of 112.5 and something like 4.4 amps? Or is different series or parallel arrangement preferred? I can cut it back to 4 panels and go 90V, or two in series at 45v. I don’t understand the considerations here, partucularly with regard to safety.
2. Am I right in thinking this controller can take high voltage input from the panels (up to 150V and still charge to 12 volt batteries?
3. And finally, where do I check the cold temperature volts t0 make sure I don’t exceed 150?
Any thoughts appreciated.
Thanks