Victron 250/100

Q&A and troubleshooting
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1

Hi all,

I need a technical advice please, I have to commission 9 solar panels in series with each having a VoC of 47.51V which will give me an output of 427V

However, reading the victron 250/100 datasheet, I found out that the max voltage is 250v, I though it will be good to have 2 V250/100 but my concern is how to connect then to have only one vdc output ? Could someone help ?

Thank you

2

How may watt per panel, what battery voltage ?

3

You can explore various options quite easily with https://www.victronenergy.com/mppt-calculator which also has a huge database of panels from which you can pick the one you have.

4

570wp per panels and batteries are lithium 48v100a

5

Ok, if you build a 3x3 matrix with your panels, so 3 in series x 3 strings Parallel you would be within the specs of 1 250/100 mppt @ 48v with a slight overpanneling.

2 Likes
6

I have 3 solar arrays, each connected to an MPPT charge controller, all 3 controllers are connected in parallel to charge the battery.

The 9 PV panels connected in series will present a challenge, due to their V(oc).

4 panels in series will have a V(oc) of 190V, comfortably below the 250V maximum of the 250/60 controller.
Two 4 panel arrays could easily be deployed on two SmartSolar 250/60 controllers.
The 9th panel does not fit into this scheme, as it would raise the V(oc) of a 5 panel string to a dangerous voltage in cold weather.
The best approach, using all 9 panels, is to wire them onto 3 strings of 3 panels each. (A 3S×3P array.) The three strings would then be connected into a combiner in parallel, the output feeding a single SmartSolar 250/100 charge controller.

1 Like
7

Will try this

But another question will be, is it possible to wire two v250/100 in series then have a signe output for the batteries?

8

The input of an mppt can only be connected to solarpanels.

So the answer is clearly NO

9

This needs a 450/100 (or 450\200 if you plan to expand) RS mppt. That has 1 VDC output. Even then though your VOC should not be more than 8x battery float. Amd you need to make sure at colder temps your voc does not ever exceed 450vdc

This is the best way to get your technical answer without actually telling us more than the VOC of the panels.

The only other option is to connect 250\100 with the array reconfigured to have the correct VOC as ludo suggested.