How do I programatically turn OFF "Grid Sell Back" for all t...

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Last Post by DougL 1 week ago

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DougL

Topic starter

February 26, 2025 10:34 pm

(@dougl)

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Joined: 2 months ago

I'm on NEM 3 and don't want to sell anything back to the grid except for the On-Peak period of 4p-9p daily. I can't reduce the "Grid Sell Back Power(kW)" value because that also limits what Forced Discharge can discharge.

There doesn't seem to be an option of not selling back once my batteries are fully charged AND export some of my battery power during On-Peak hours so that I can not only help the grid during peak loads but also try to offset the additional fees IOUs are adding to solar PV customers.

If there is no way to do this in the current firmware, is there a way to connect a computer to the EG4 18KPV and send it commands to turn off Grid Sell Back and then turn it back on only for the TOU On-Peak period then back off again?

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NEM3

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Posts: 122

Eric

February 28, 2025 6:16 pm

(@eric)

Estimable Member

Joined: 4 months ago

You can manually set the Grid Sell Back using the app or the monitoring website at 4 PM and disable it at 9 PM. However, there is currently no option to schedule grid sell back for specific times.

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DougL

(@dougl)

Joined: 2 months ago

Eminent Member

Posts: 31

February 28, 2025 7:02 pm

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Eric

@eric Thanks, I've come to that conclusion too and in the meantime I also learned that NEM3 sell-back rates are lowest during highest grid loading(4-9p) and that maximum sell-back rate for solar generators/storage is during super-off-peak times(midnight-6a).

I don't want to bother selling back at only 5 cent/kWh so I'm now looking at Python Protocol Gateway and Home Assistant or even just a bash script to send MQTT messages to manipulate the max Grid Sell Back value based on our EV SoCs and battery SoC after sunset.

Seems a shame to have to pull the WiFi connectivity to get that to work( INV-RS485 ) but unless there is a true network Ethernet port somewhere it seems I'll have to lose EG4 Monitoring capabilities just to get some NEM 3 type system control.

BTW, I tried to get down to see you guys at InterSolar but could not find trolley parking at 3 different trolley stops.

Question How do I programatically turn OFF "Grid Sell Back" for all times but Forced Discharge period

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