Mppt 450/100 with 22A paralleled string input

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Andrew Hodchild asked Oct 23, '22

Mppt 450/100 with 22A paralleled string input

We have built 12.6kWp array with 30 x trina 420Wp (10.69 Isc and 49.7 Voc).

We want advice on running 2 x 350Voc and 2 x 400Voc paralleled strings to MPPT 450/100. I the manual it states that it can take 'slightly' more with caviat that polarity protection is only good up to 20A!

Elsewhere it states that a max if 7200Wp per tracker which we would be under. We are wanting to max output in low and winter sun, but distributer says it will crop all year round.

I am a bit concerned it will work machine too hard?

MPPT SmartSolar mppt rs

2 |3000

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Answer 1 · 2022-10-23T08:32:05Z

Alexandra answered · Oct 23, 2022 at 08:32 AM

@Andrew Hodchild

The 20A limit is a problem if the mppt has to short the input PV. It does that for reverse polarity connections.

https://www.victronenergy.com/media/pg/SmartSolar_MPPT_RS/en/installation.html#UUID-a96ec91b-a21c-0536-1a40-278fd7f9410d

So put simply from the manual, you can but don't make a mistake.

screenshot-20221023-103141.jpg (352.2 KiB)

2 |3000

Attachments: Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

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