question

kris-goubert avatar image
kris-goubert asked

Amount of solar for Multi RS solar

specssolar.jpgHow to I connect 10 x 355 watt panels on the multi RS solar ?

Does it damage the MPPT if I do connect to much solar ?


mppt rsmppt state
specssolar.jpg (228.8 KiB)
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Alexandra avatar image Alexandra ♦ commented ·
@Kris Goubert

We would also need to know your battery float voltage since the string VOC is based on that

In fact the entire systems power and performance is based on the battery specs.

See the tech specs.

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kris-goubert avatar image kris-goubert Alexandra ♦ commented ·
Correct !! I did forget to mention that is is for a 48 volt battery bank
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kris-goubert avatar image kris-goubert kris-goubert commented ·

Thanks. What happens if you put to much solar ? Do you harm the MPPT ? Or are you just better prepared for winter (low sunhours) ?

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Alexandra avatar image Alexandra ♦ kris-goubert commented ·

It depends on what you mean by too much solar.

Max VOC is usually 8x float voltage of the battery.

And you can have extra strings, but you need to be aware of not making mistakes like reverse polarity with the extra strings.

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2 Answers
wkirby avatar image
wkirby answered ·

10 of those PV modules in series would work pretty well. 3.55kW of PV is comfortably below the maximum of 4kW.

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kris-goubert avatar image kris-goubert commented ·

Thanks. What happens if you put to much solar ? Do you harm the MPPT ? Or are you just better prepared for winter (low sunhours) ?


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wkirby avatar image wkirby ♦♦ kris-goubert commented ·
More PV power than 4kW is OK, the MPPT will only take up to its maximum from a bigger array and yes, very useful for cloudy winter days.
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biswa avatar image
biswa answered ·

10 X 355w panels in series on the multi-RS solar will work pretty well as it has a maximum DC voltage accepting a range of up to 450V with 18Amps. If you cross the 450V range, it will stop working. An overvoltage event can damage the solar charger, depending on how much the maximum PV voltage was exceeded. This damage is not covered by warranty. -from manual

You can make two strings ( a. 10x355w b.10x355w) and connect to your Multi RS Solar.

But always keep in mind that you will get a Maximum DC charging power of 4000 W.

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