I have “Optimized without BatteryLife” and 55% minimum SOC.
When there is a PV production during winter, the system charges batteries till 60%, then covers the consumption till 55% and charges again. Is it possible to set Victron to use PV power for direct consumption instead of charging if there is higher AC consumption than PV production (for example, if there is a total AC consumption of 1000 W and PV production of 800 W, Victron should buy from the grid 200 W and not charge the battery with 800 W and buy 1000 W from the grid)? I lost a few kWh of energy during a sunny day and it decreased battery life.
Those cycles don’t hurt at all. But if you have not enough solar to make the battery usage somewhat useful during winter, i’d switch mode to “keep batteries charged” and let them sit there during winter.
Thanks for the advice but LiFePO4 batteries should be used between 20-80%. I use it up to 100% during summer when it is discharged at night, but I don’t want to keep a 100% minimum SOC for the whole winter. 55% should be good SOC for proper storage during winter.
You could simply try lowering the charging voltage via DVCC so that nothing can be charged into the batteries.
e.g. I charge my 6 x 3000 Pylons with my Eltek at 50.5V
which is exactly enough up to 90% … it just won’t go in any more.
If your Mppts now start to charge then they have to support the mains because the batteries don’t want anything more.
If you go any lower, you may end up with 80% max. SOC when charging.
but the system raises the charging voltage again by 0.4 V when it is fed in … you have to take this into account
Thats been discussed multiple times on this and the old community…
if you keep them on keep batteries charged and connected to the system (what you should) its 100% SOC and the system will use small charge/discharge and they will keep balanced
If they are put away for storage 55% can be fine
But not connected to the system, they will get unbalanced
I want to use batteries but in a more efficient way. If there is a consumption higher than a PV production it should be more efficient to use this power for consumption because if it’s used for charging batteries, there is a higher loss because of charging and discharging. I want to use for charging only the power that cannot be consumed at the moment - that’s the main point.
There are a few related settings that may be affecting the behaviour.
Do you have power assist on at min SOC?
Sometimes it is actually a bms setting that causes cycling. Of course not all of them can be altered.
Have you tried a voltage cap to prevent the charge (obviously you can’t keep that like that for long periods).
As an FYI the pylontec bms already manages the cells in this range. When pylons say you are allowed to use 10% to 100% they mean of the optimal voltage range of the cell. Their bms does not let you use outside of the range.
Could you please tell me where I can find the power assist with the minimum SoC? I’ve gone through the remote control, but there is no power assist menu.
The voltage cap would solve this issue, but it would lead to leaving a few kWh on the roof which is unwanted behavior as well.
