question

h2009 avatar image
h2009 asked

Grid pull when discharging from battery

Hello,

I'm looking for some help getting my system setup correctly please. This is what I'm trying to achieve:


  • Off Peak charging
  • Grid to charge batteries to 75% (but allow PV solar to charge batteries to full, if possible)
  • Allow batteries to discharge to 10%
  • If batteries are being used (i.e peak hours) then stop all possible grid importing of power (at the moment I'm getting between -100 watts and +100 watts in short bursts).


System:

3 Phase UK

3x MP2 48/10000/140-100/100

2x MPPTs 450/100

16x US5000 batteries


Thank you

screenshot-2022-10-18-at-223211.png

screenshot-2022-10-18-at-223223.png

screenshot-2022-10-18-at-223232.png

screenshot-2022-10-18-at-223238.png

screenshot-2022-10-18-at-223013.png

screenshot-2022-10-18-at-223040.png



Multiplus-IIMultiPlus Quattro Inverter ChargerESSbatterygrid
screenshot-2022-10-18-at-223040.png (221.5 KiB)
screenshot-2022-10-18-at-223013.png (217.2 KiB)
screenshot-2022-10-18-at-223238.png (74.9 KiB)
screenshot-2022-10-18-at-223232.png (87.2 KiB)
screenshot-2022-10-18-at-223223.png (98.9 KiB)
screenshot-2022-10-18-at-223211.png (85.1 KiB)
2 |3000
Toggle Comment visibility. Current Visibility: Viewable by all users

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

1 Answer
awalkerinuk avatar image
awalkerinuk answered ·

Not sure its exactly the same but maybe as this question https://community.victronenergy.com/questions/162712/ess-exports-excess-solar-to-grid-instead-of-chargi.html?childToView=163076#answer-163076

With such huge systems it may take longer to respond to changes and also may kick back more to the grid. I only have 4 x 320w panels and only see -50w ish to grid before my single battery charges.

2 |3000
Toggle Comment visibility. Current Visibility: Viewable by all users

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