ESS integrating with SolarEdge - Questions

[smolit]

Right. Exactly that happened.
When the battery soc went to 100% the SE Inverter and also my second Fronius Inverter (which I didn‘t mention so far for simplicity) stopped production and started again After a while when the MP shifted the frequency down.

[moacir]

You see? Some “fanatics” like me don’t want to shut down the inverter(s). SE takes a while to come back online, and during that time, you’re consuming energy from your batteries. But if, instead of shutting it down, you control it, then the inverter would only produce what’s needed to power the load. This would save battery energy and avoid the constant “flapping” (on/off cycling) of the SE inverter.

For those willing to understand why it shutdown, you can refer to the COMMISSION REGULATION (EU) 2016/631, where it states:

So, if the inverter is not in APS mode, shifting the frequency up to 51.5 Hz must not affect its operation for a minimum of 30 minutes. However, if in APS mode the inverter is not required to comply with this rule as it is not on-grid. This means you can use frequency shifting in this range to adjust the inverter’s output power.

Anyway, who cares? Only fanatics like me. Please notice this is only valid for most of the countries in Europe.

[UHae]

Thanks guys for the great input in this thread!

I also plan to be brave and will try to test the behaviour of my system over the next few days. I’ll report back once I’ve tested the system.

Happy easter everybody!

[BartVic]

Too bad Victron does not support SolarEdge similar to the way it does for Fronius - where it can reduce power via direct communication with inverter without the need of freq shifting. I mean - SE does provide modbus TCP and allows dynamic power limiting via this interface. It could have same features as Fronius when steered from Victron but that part of support is just not there. Great that most inverters nowadays must limit their power as frequency response as it does not make any difference then what brand it is..