question

h2009 avatar image
h2009 asked

Solar power won't charge batteries beyond ESS SOC limit?

Hello,

System:

3x Multiplus 2 - 10KVA

2x MPPT 450/100 controllers

16x 5KWH batteries Pylontec



I have ESS setup to a SOC of 70% topup limit from the grid at off-peak energy time. However during the day when no one is home the PV output is greater than the load of the house. However the batteries are not being charged beyond 70% - I've tried adjusting this limit when I notice this occurring but it still had no effect.

I did take a video of the system but in general there was atleast 100watts of excess power not being pushed to batteries.


Anyone suggest anything?

screenshot-2023-02-10-at-234715.png

Multiplus-II3 phasesmart solar charging behaviourdc system
screenshot-2023-02-10-at-234715.png (407.8 KiB)
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2 Answers
Alexandra avatar image
Alexandra answered ·

@h2009

You need higher string voltages for the RS to work properly/better.

Also check the CCL the pylons are sending to the system.

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andy-mullins avatar image
andy-mullins answered ·

I am trying to limit my SOC on grid scheduled overnight charging to give me some headroom for solar during the day. What setting did you select to limit yours to 70%?

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