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cordy-van-der-burg avatar image
cordy-van-der-burg asked

MultiPlus II - loadshedding - misuse generator option

Hi,

I live in South Africa and we have a huge problem with loadshedding, so I installated a MultiPlus II 5000, MPPT RS450, Cerbo GX and 3 Pylon US3000C.

Now I noticed when we have loadshedding during the day that my MPPT during the grid failure doesn't supply any power to the system.
The manual states that this is not implemented in ESS but you can misuse the generator option, unfortunately I can't find any info about how to do this.

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Best regards,

Cordy

MPPT ControllersMultiplus-IIgrid
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2 Answers
cordy-van-der-burg avatar image
cordy-van-der-burg answered ·

So yesterday evening I switched my battery settings from Optimize battery life to Keep battery charged and looks like that fixed the problem.

Still would like to know what is meant by misuse the generator start/stop function.

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shaneyake answered ·

Load shedding to not what you think in the rest of the world. It is load reducing or peak shaving, reducing you the maximum power pulled.


The way Victron had it setup was that to prevent an inverter overload it would turn off heavy loads. You can now do this with relay assistant or generator start/stop.

Basically there is feature where if the inverter is going to overload it would start a generator and switch over to that but you can misuse it by instead of starting a generator you can open a relay to turn off some of your loads to prevent overload.

Switching from Optimize battery life to Keep battery should have no effect while grid is lost.
All ESS settings are ignored when grid is lost.

I would check on the advanced tab on VRM, for battery Limits. Most likely the BMS turned off charging for some reason, this is normal for relatively new systems before all the cells are balanced.

We normally leave the system in keep batteries charged for a week or so when using pylontech batteries to give the system time to balance all the cells. It can only balance at high SOC like 95+

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Hi Shane,

Thanks for the extra background info, makes sense to mis use the gen start for that.

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