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Evgeniy Labunskiy avatar image
Evgeniy Labunskiy asked

MultiRS Solar scheduled charging using Node Red

As soon as from 1.12 firmware there is an option for ESS External Control, Im wondering if I can implement the following scenario: charge battery during night time only (except cases when SoC is low). Thats what's my plan:

1. Switch MultiRS Mode to ESS External Control

2. Using integrated Node set ESS State to "10 - Optimized mode w/o BatteryLife: self consumption, SoC at or above minimum SoC"

3. When SoC is down less than 30% change ESS State to "12 - Optimized mode w/o BatteryLife: recharging, SoC dropped by 5% or more below minimum SoC"

4. As soon as night time came (after 23:00 till 7:00) change ESS state to "9 - 'Keep batteries charged' mode is enabled" until full charge

5. As charge is full change it State back to 10.

Is it a good idea overall? Will it work?

Node-REDMulti RSscheduled charge
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2 Answers
Evgeniy Labunskiy avatar image
Evgeniy Labunskiy answered ·

Looks like I cannot control Muiltu RS usign Node Red as it changes Cerbo GX settings on ESS, not MultiRS

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mvader (Victron Energy) avatar image
mvader (Victron Energy) answered ·

Hi, that might be possible some day; but not now.

The External control option for the RS is not usable yet; since there is no support for it in Venus OS; to pass it through to Node-RED (or anywhere else).

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Evgeniy Labunskiy avatar image Evgeniy Labunskiy commented ·

Any estimations/guestimations? :)

Bought MultiRS as there was no other options for me at that time (live in Ukraine, there was a hot season on the market last autumn for investors) + lack of knowledge about invertors overall from my side. I understand that it's might be better to change to MultiPlus-2 or Quattro to have this staff out of the box

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Evgeniy Labunskiy avatar image Evgeniy Labunskiy commented ·
And another related question: I see I can change invertor mode using node red, switch it between ON/Off/Charger/Inverter. Might it be the option for scheduled charging/possible workaround? if yes, then I can set it to "Inverter" (but I dont know what will happen if more power is needed then battery can provide)? I see it like:

1. More than 30% SoC than mode = Inverter
2. Less than 30% SoC or time between 23:00<>7:00 than mode = on
But in this case I worry than in case of more than 5kW is requested than inverter can go to error mode. Or it will provide power that required on top from grid?

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