question

petr-slepicka avatar image
petr-slepicka asked

Disable battery charging in the morning

I have my own WattRouter that optimizes my household Victron.jpgconsumption. I'd like to extend it with a feature that disables battery charging in the morning - pushing battery charging to a later time.

The goal is to sell PV power at higher prices at SPOT (7:00 - 10:00 AM) in the morning and then charge the battery at lower feed-in tariffs.

Everything else must be business as usual - especially the delivery of PV to the house.

Multiplus-IIbattery chargingVRM
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4 Answers
Duivert NL avatar image
Duivert NL answered ·

If you use the ESS assistant you can use scheduled charging for that

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petr-slepicka avatar image
petr-slepicka answered ·

How can I achieve that?
A link to the documentation or anything else would be useful... I'm really not wise to this answer and it didn't help me much :-(

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Duivert NL avatar image
Duivert NL answered ·

Here is the ess installation guide:

https://www.victronenergy.com/media/pg/Energy_Storage_System/en/ess-introduction---features.html

Section 4 is about scheduled charging

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Ingo avatar image
Ingo answered ·

I would like to revisit this question as the OP didn't specify DC vs AC PV and I think that changes the solution. An option might be to set the ChargeCurrent to 0 between 7am and 10am but that will not limit DC PV charging, if that is the case here but might work for AC PV - not sure.

If DC PV is in play, is there a way to achieve the same result as the original question? Feed back to grid between 7am and 10am but power the house and maintain MinSOC during that time.

A few people have asked me the same question , but for DC PV, and I don't have a solution.

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Alexandra avatar image Alexandra ♦ commented ·

@Ingo

Look up DESS. There you can set up buy and sell periods.
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Ingo avatar image Ingo Alexandra ♦ commented ·
Will do. Thanks @Alexandra
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Duivert NL avatar image Duivert NL commented ·
i have only DC PV and used to do that to with ESS and scheduled charging,


discharge battery at night and early morning, then in morning PV starts and when PV at a scheduled time start charging the batterys, in the event of surpluss always to loads/grid
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Ingo avatar image Ingo Duivert NL commented ·
@Duivert NL When I tried that quite a while ago I couldn't get it going, the battery kept charging from DC PV but it might have been due to old firmware. I will re-look at scheduled charging with the latest firmware.
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