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I have 2 x 330 watt panasonic HIT solar panels with a maximum 50 volts fitted to a narrowboat which is powered by a 48 volt electric motor. I have 2 banks of 48v gel batteries with 230ah from each. I will be looking to move to lithium in the future when the prices drop. Looking for advise on the most suitable charge controller
Hi AJ. Into 48V, you don't need much A, so a '100/20_48' is for you. Not to be confused with a standard 100/20, which can't do 48V. https://www.victronenergy.com/upload/documents/Datasheet-BlueSolar-and-SmartSolar-charge-controller-overview-EN.pdf
But the panels must suit. My google suggests those Panas are quite high V, like well over 50V. In the case of a 100/ mppt, this is critical, and I'd urge you to recheck the Voc and Vmp of them.
JohnC
Being a complete novice the specification of the panel is below
Specifications:
Peak power Wp 330W
Voltage at peak power Vmp: 58.0V
Max open circuit voltage Voc: 69.7V
Current at peak power Imp: 5.7A
Max short circuit current Isc: 6.07A
Please advise
Yeh, those V's are where google led me. That would be ok, but strictly wired in parallel into a 100/ mppt. For better low-light performance they could be seriesed into a 150/35 mppt, but that's a stepup in price and capacity. The capacity is no issue, just a few more $$.
Those panels aren't especially natively suited to your application, and there may be others more easily dealt with, but if that's what you want, it's certainly doable. And further expansion possible just by adding in more matched panels if you went with the 150/35.
