question

chrisgrainger2408 avatar image

100/20 48v Mppt panels

Hello all.

I want to add more charging capacity to my victron ESS system moslty for the winter/dull days.

(multiplus 48/5000/70, 4 x pylontech us2000 and 4kw solar Edge)

Looking at getting a 100/20-48v.

The choice of panels I have are

4x 285w 2series 2 parrel (voc39.3V isc 9.5A per panel)

2 x 325w in series. (voc40.7V isc 10.37A per panel)

2 x 375w in series. (voc47.75V isc 10A per panel)

They will be on a flat garage roof s/w facing so will not have max sunlight.

All check out on the victron calculator but with 4x285w showing Amber charge current of 20A

Im thinking 4 x 285w for most efficient in bad conditions, but some expert advice would be much aprociated.

Chris

charge controller compatibilityess mppt
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1 Answer
wkirby avatar image
wkirby answered ·

That 100/20 can produce 960W nominal, and 1120W when battery Voltage is 28V.
4x 285W panels will make 1140W at full chat. So this makes a really good combination. Wire them, as you suggest, 2 series - 2 parallel.

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Sorry can you explain the 28v, this is for a 48v system?