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kevin88252 avatar image
kevin88252 asked

Multiplus 2 2x5000 vs 1x10000

Hello Guys
i need some advice for doing a decision. i have found out that the 5kVA Multiplus II are way less expensive than the 10kVA. Does it have any dissadvantage to buy 6x 5kVA over 3x 10 kVA (3 Phase application)

i see one big benefit in buying the 5kVA, in case my energy needs will raise in the future i can add more Inverters in parallel, this is not possible with the 10kVA right?


thanks

Multiplus-II
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kevgermany avatar image kevgermany ♦♦ commented ·

Adding more in parallel depends on matching the internal hardware revisions. It might not be possible if you leave it too long.

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manta avatar image
manta answered ·

If you got enough room, getting 5kva will save some money, but also is less efficient, more parasitic power draw. You can also look for a 8kva model.

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manta avatar image manta commented ·
But using 5kva multiplus, the max power is a bit higher in general. Also you could make something on a Cerbo GX, node red for example to stop 3 of the multiplussen when consuming low power via the remote switch connected to one of the Cerbo relays, even in software (node-red) this is possible with the VenusOS large image.
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derrick thomas avatar image derrick thomas manta commented ·
You cannot switch off parallel multi's in a parallel/3 phase configuration. If one of the parallel units is switched off the master will shut down as well.
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nickdb avatar image
nickdb answered ·

There is no benefit for 2 vs 1. It uses more power, finds it more difficult to maintain the set point. Yes, if you installed them properly, you can reprogram one to be standalone, but in bad grids, 2 seem more likely to be a problem than 1. Unless for certification, always install 1, not 2.

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