Easysolar II GX not charging from a/c coupled PV. How can stop it exporting to the grid and make it go to the charger. Setup is ESS optimised with battery life using Pylontech US2000 and a current transformer on the incoming grid.
asked
Should a/c coupled charge a battery in ESS mode?
I don't see your AC PV on the ccgx screen. How is it being monitored or was programmed into the system?
The A/C coupled PV is connected to the AC 1 output and displays in the AC loads. The grid power is measured by a current transformer (CTR110000500 ).
Try limiting grid feedback or maybe prevent grid feed in for a bit until you are happy with battery SOC. See if it will charge up from the ac pv
Turned of ac coupled feedback excess but it had no affect in passthru. It only comes out of passthrough when the batteries are fully charged. It is in ESS optimised mode and not batterysave.
It seems to be treating the pv like the grid basically then.
On ess with dc coupled pv the loads are fed from the grid in passthrough until they are charged or you have reached the desired SOC.
Does it still feedback even though you have turned off the feed in pv feature?
Yes, the inverter is switched off until the batteries are fully charged and ac coupled feedback flows. Any dc coupled goes to the batteries. Once the batteries are charged it changes to absorption/discharge/bulk, the inverter now works normally and will use the batteries to discharge when there is a demand. Once there is no solar it switches to passthru and does not react to a scheduled charge window or any demand. It is more like what I would expect from a keep batteries charged configuration but it is set to ESS optimise.
By inverter is switched off, does this mean you are switching the inverter between charge and on? The inverter will switch to passthrough in charge mode.
If you just leave the victron inverter on, what happens when you want to charge with the ac pv?
When say the inverter is switched off I mean that some relay must be automatically switching off the bridge (inverter) between ac and dc. I do not mean actually changing the physical switch on/charge.
If I set the scheduled charge on it will display the mode change but the charger will not charge from the grid. See below. As you can see I am losing 328W to the grid that could be charging the batteries.
Ok and if you disconnect the grid does it then charge the batteries?
Also what ac pv inverter do you have?
Hi @Gat
the system is in passthru, please read the manual about that:
(see Q4)
https://www.victronenergy.com/live/ess:design-installation-manual#faq
Yes, I have looked at Q4 and none of them apply. Any other sugestions?
Q4
1. Grid meter not enabled.
2. Battery information is displayed.
3/4.CCL=50, DCL=50 SOC quite high, Ac current limit not exceeded.
5. UK grid code, No aux.
6. Grid to inverter <2m.
Have now tested with AUX and LOM disabled. No change. I have now reset them back to default settings.
If the passthru caused by one o the items in Q4 would it still be able to go into the abosrption mode and pass dc coupled pv to the grid? when my Easysolar II gets to about 98/99% soc it comes out of passthru and into absorption/discharge/bulk mode. It then allows a flow through the inverter.
Then a few minutes later.
