I have two problems, and I believe the first one is causing the second:
When the battery is fully charged, I see three states in the console: first idle, then discharging, and finally charging. This cycle repeats endlessly. When the battery is fully charged, the voltage reads 50.10V.
The configuration of the MPPT and MultiPlus-II is as follows:
The system doesn’t inject the excess power into the grid. When the battery is not fully charged, I see 1800-2100W from the PV panels. However, when the cycle I previously mentioned starts, it never feeds any power to the grid.
I do have enable the feed-in option and DESS
What should I do, and what parameters should I check?
The absorbtion Voltage from the BMS seems 0,5V higher than the absorbtion Voltage from Victron, so it might never be reached and the BMS never states 100% full.
I’am no expert, just my 2 cents. Better wait for more answers.
The battery sent a CCL of zero to the system - the battery is considering itself as fully charged.
The system is under eternal control (bms control)
The charge and discharge switching is small amounts of current moving in and out of the battery storage. Its fairly normal for an ESS system.
It will be trying to maximise solar for loads and keep your grid set point and your battery min soc. And the solar is being fickle.
What could be the reason when the battery is charging I can see 1800w - 2100w generated by the PV Charger, but when the baterry is full, it don’t inject that amount to the grid.
Also there sometimes when the battery is fully charged, the system doesn’t feed-up to grid, I have active the options to feed to grid, without any limit, where can I look to improve this?
For you to feed in excess power, there has to be excess power.
From what I can see your PV is less than even your loads in the house, which means there is no excess. (from your screen recording)
Do tou have a schedule in dess?
The problem is, when the battery is charging I can see higher values in the PV, but at soon as the battery is charged, the PV doesn’t produce the same power and I know it should be producing more
The battery start to charge at 07:00AM and is fully charged at 11:00AM (aprox), so I know from 11:00AM to 15:00PM the PV should be producing the same or even more.
What I’ve noticed is the PV produce more power when my loads are higher, but if I have lower loads the PV doesn’t feed the excess of power (of feed much less)
I have deactivated DESS the last days, I only have ESS at this moment.
After disable the DESS I have seen better results, the system is constantly inyecting to the grid even when it’s charging, and when the battery is fully load, I see higer values on the inyection.
Beside of deactivating DESS I used the defaults values for my battery type on the MPPT (using the rotary switch)
Yes if there is power moving over the ve bus. (unless actively charging from grid)
For power to move there has to be a higher potential so yes. Only other time there is a big difference is volt drop due to resistance. But that has to be checked under different circumstances.
