# question

## MPPT 100/20 and 2x200W PV panel

Is Victron BlueSolar Charge Controller MPPT 100/20-48V suitable to connect 2 solar 200W panels in series (camper batteries : 2x 105 Ah, 12V system)

1 comment

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1) Only if your Solarpanel temperature goes not under -30C.

2) The BlueSolar MPPT 100/20 support only 330W in a 12V System. If it is ok for you to loose 70W, then yes, it will work. otherwise the BlueSolar MPPT 100/30 is more suitable, exspecially if it is winter and you get full sunshine because the panels can deliver more then the rated output.

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use Victron's mppt sizing calculator

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

Also interested in this - will to much panel output break the MPPT or will MPPT just limit the power but otherwise work normally?

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Limit
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Michelle Konzack ·

Is there some upper limit for over power? Is for example 2000W for MPPT 150/70 still safe? I'm thinking it for outside summer season when yield is quite low here.

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pekkaj ·
As suggested above, use Victron's calculator. But as long as you don't exceed the Isc rating of the MPPT and the input voltage rating at your lowest temperature, it will work.
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kevgermany ♦♦ ·

So MPPT will not limit the power but break when over power by over voltage.

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pekkaj ·
With two 200W panels in seriesvand a 24V system, you need at a Voc of 80V at least -40°C to kill tje MPPT with an Overvoltage.

A 200Wp module has probably an Impp of around 6,5A and will not kill the MPPT

The MPPT 100/20 has an output of 560W @24V and is perfect suitable.

You can have even 2 Strings in parallel with 800W, but the MPPT output will be limited to 560W.

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Michelle Konzack ·

Yes my comment was in general. So overvoltage must be avoided in any system.

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