When my system is at 100% SoC an erratic discharging/charging control loops starts to occur when in absorption charging, There is plenty of solar feedback into the grid available, thus discharging is absolutely uneccesary. See example here: The charge/discharge currents are very low, between…

Fairly normal for some batteries, the bms is trying to balance. It can be exaggerated by diy bms’s which will need to be tuned… This bms is unsupported so it will need some trial and error.

This is due to peak shaving which can’t be disabled at the moment unfortunately. [image] Multiplus 2 flipping between charging and discharging when load is changing Q&A and troubleshooting When my Victron Multiplus 2 5000 GX has reached the soc and doesn’t have to charge …

Thanks for your response @JeroenSt . Is this peak shaving also occuring while there is only feedback into the grid? There is absolutely no need for the system to do this peak shaving, since there is only feedback towards the grid.

Peak shaving only applies if you have set a low input current limit and are drawing more load than that. In your case your loads are small. The numbers in that pic doesn’t stack up. 1300W PV, 44W to battery, but 963W load and 1100W being fed back.

Well, I have set a maximum grid current of 40A and when the battery is above minimum soc peak shaving is causing charge and discharge flipping.

If you aren’t trying to draw more than 40A, it wouldn’t be trying to discharge the battery. Some batteries will naturally fluctuate as a result of balancing. For the OP it doesn’t appear that peak shaving should be a factor.

It should work that way but it doesn’t. When peak shaving is disabled due to minimum soc the charge discharge flipping doesn’t occur. It is the victron that starts discharging for a short time when a load is switched on and starts charging for a short time when a load is switched off. I think the…

These numbers indeed do not make any sense. It looks like the calculation from AC-loads is wrong. Grid data is coming trough the P1 port into the dbus. At least the ESS system is working perfecly fine, it’s regulating nicely to the grid setpoint. Currently there is nothing connected to my AC-out …

It doesn’t look like your meters are configured right. If they aren’t victron gear and are third party ones with OS mods, that is something important to mention. Until the system is reporting right, drawing any conclusions on why things are behaving the way there are is premature.

I’m experience similar behavior. When the battery is full (@55.2V = 3.45V per cell) the system start flipping between charging/discharing/idle mode. I’m expecting that the float mode would start when the battery is at 55.2V and stays there for a certain amount of time. Why is this happening? There i…

End of charge / 100% SoC behaviour, system keeps charging/discharging

DIY

JeroenSt 5 February 2025 18:20 3

This is due to peak shaving which can’t be disabled at the moment unfortunately.

Topic		Replies	Views
ESS continous switching between charge/discharge when battery full and negative grid power DIY diy , multiplus , ess , 3-phase	32	3171	28 August 2025
Multiplus 2 flipping between charging and discharging when load is changing DIY beginner , ess , dess , multiplus_2_gx	11	457	8 May 2025
Multiplus 2 charging/discharging behavior DIY diy , multiplus-ii , cerbo_gx	7	181	6 August 2025
Bug?: Peak shaving drains battery permanently despite minimum SOC Q&A and troubleshooting ess , multiplus-ii	23	726	18 February 2026
Multiplus is charging from Grid DIY diy , parallel , ess , multiplus-ii	8	556	14 November 2024

End of charge / 100% SoC behaviour, system keeps charging/discharging

Related topics