Has anyone experienced problems with peak shaving when scheduled charging is active, but it works 100% correctly when scheduled charging is not active?
Scheduled charging is what it says, scheduled charging so yes it overules everything else
No i haven’t.
What are you expecting vs what is happening?
Hi
I have a 3 phase system with an external energy meter and large AC loads between the external meter and the three Multiplus units. Peak shaving is selected and set to always and works correctly when EESS is in the “normal” mode. I was expecting the system to still implement peak shaving during scheduled charging – but based on other users comments one of then needs to take priority, and it is scheduled charging.
As you are a Victron expert here are two strange behaviours I have encountered that you can hopefully clarify.
- I have a Fronius inverter connected to AC1out and controlled by the Cerbo. If “AC coupled PV – feed in excess” is set to ON (under ESS – Grid feed in), then when the grid goes down the Fronious shuts down and the system drains the battery. If I then toggle “AC coupled PV – feed in excess” to OFF, the Fronius starts up and supports the critical loads as expected.
- ESS is set to Optimized with battery life, so when the loads exceed the solar production, the system drains the battery and draws nothing from the grid until the battery reaches SOC (as expected). But then it draws the full load from the grid and uses 100% of the solar to charge the battery until SOC rises 5% before again drawing nothing from the grid and discharging to support the loads in full. This behaviour causes an oscillating demand from the grid. Would it not be better to simply support the loads from PV and supplement from the grid to meet the demand, leaving the battery as SOC – which is the behaviour when scheduled charging is active.
Regards
Steven Versfeld
South Africa