The voc of my 3 x 245w panels is 159v, would I be right in thinking i can connect my panels in parallel and use a 150/70 charge controller? I'm running a 12v system.
Thanks in advance.
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Solar charger sizing query.
Please clarify, Is it 159Voc per panel or all three in series?
159v voc would be all three connected in series.
Negative; the 150v input rating is a HARD LIMIT and must not be exceeded under any circumstances. You could, however, wire two in series and keep the third in parallel and -depending on the other specs of your panels- be fine.
I realise the voltage shouldn't be exceeded, I was under the impression that if I connected all three panels in parallel that I'd be well under the limit and able to use a smaller less expensive controller, the 150/70.
Justin, Can you explain a little more about 2S 1P config. I did not realise that was possible, it may open up module upgrade for my current MPPT. Are there any drawbacks?
Hi Frosty. Agree that paralleled into 12V batts would be fine.
Just adding that you wouldn't need a 150/ mppt in that case, and I'd actually suggest you consider a 100/50, which would rarely (if ever) clip at the A-limit into typical charge voltages. Might save you some coin..
I wondered if that would be the case, appreciate the reply, cheers.
