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enfrafer avatar image
enfrafer asked

How to limit grid power

I am trying to limit the grid power in my new Victron ESS. According with my electricity supplier I can use a maximum power of 4.5 Kw. However, this morning I tried to charge my EV and I realized I was exceeding the 4.5 Kw so had to stop the charging...

ev-charge-exceeding-grid-limit.png

My installation configuration is an Victron ESS + Fronius like this https://community.victronenergy.com/storage/attachments/13127-layout.png.

I have an EV charger brand "policharger" which has been working very well so far. In fact, the policharger reads the home instant energy consumption and adjust the EV charge not to exceed those 4.5 Kw (configurable data). This is not working anymore because the battery charge is not being considered by my charger (there is a kind of an amperimetric clamp reading the home energy consumption). I could obviously tried to measure the home + battery energy consumption however I wonder if there is not something straightforward to limit the energy from the grid in the Cerbo.

Thanks

cerbo gxgrid
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2 Answers
nickdb avatar image
nickdb answered ·

Uhm, under the inverter tab in the Cerbo, input current limit?

Lots of good stuff in the manuals if you choose to read them.

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johnone avatar image johnone commented ·

Aside from policing whether or not people have read the (often dogs-dinner like) manuals to your satisfaction @nickdb , is it the case there is a common misunderstanding here concerning inverting/charging and pass through, i.e. passing through from the grid given both the charging current and the AC loads? A few wise words from you on this might help many on here, including myself!

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enfrafer avatar image
enfrafer answered ·

Thanks a lot, seems to work quite well. As @Johnone mentions, maybe I was confused and did not want to limiting my full AC load, since my PV capacity is a bit higher than my grid limit (7.6 vs 4.5).

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Related Resources

Additional resources still need to be added for this topic

Cerbo GX product page

GX family product range

Cerbo GX & GX Touch datasheet

Cerbo GX Manual

Venus root access document