question

michael-weigand avatar image
michael-weigand asked

MPPT Solar charge controller with flexible panels and 24v

Hi,

I recently bought four flexible solar panels. Their specification is as follow.

Maximum power(Pmax) 150W
Output tolerance ± 3%
Maximum system voltage 700V DC
Open circuit voltage(Voc) 21.6V
Maximum power voltage(Vmp) 18V
Cell efficiency 19.5%
Operating temperature（NOCT） 45±2℃
Temperature range -40℃～+80℃
Number of cells 36pcs
Weight 2200g
Size 1170*540*3 mm

So this is a total of 600W. I want to charge a 24v lithium battery with it. Can you suggest, how to wire and what Victron MPPT controller would fit best?


Thanks in advance,

Michael

MPPT ControllersMPPT SmartSolar
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1 Answer
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wkirby answered ·

A 100/30 MPPT would cover 600W of PV on a 24V battery system.

2 PV modules in series and then 2 in parallel would be a good configuration if shading is a problem.
If shading is not a concern then you could wire them all in series, but make sure the ambient temperature does not get too cold otherwise there is a risk of going over the 100V limit on the PV side.

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