Limit EV Charging Based on Peak Hour Rules and P1 Import via Home Assistant

[Xnygra]

Hi all,

I know there are probably many ways to solve this, but I’m curious – how have you approached it?

Here in Sweden (at least in my region), part of the electricity bill is based on the top 3 hours of consumption each month. However, all consumption between 22:00–06:00 is counted at only half value.

Because of that, I charge at full power (in my case 3x16A) during the night hours. But during the day, I’d like to limit the charging current to 3x7A. I have my SmartEVSE fully integrated with Home Assistant and want this logic to be controlled from there.

Taking it a step further: I also have solar panels, so ideally I want SmartEVSE to charge as much as possible during the day – but only if the import current (measured from the P1 meter) stays below 3x7A.

Anyone have a smart way to achieve this with HA?

[mif11k]

Hi, This is a similar problem to my feature request related to possibility to adjust the value of Max Charging Current via Home Assistant. I think this si the only way to solve it. I used to change this value on SmartEVSE 2 via modbus directly, but in the SmartEVSE 3 and HA integration there is no way to modify this value. This might be time to reevaluate the possibility of adjusting the Mach Charge Current via Home Assistant in such scenarios.

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On 1. 6. 2025, at 12:06, Xnygra ***@***.***> wrote: Hi all, I know there are probably many ways to solve this, but I’m curious – how have you approached it? Here in Sweden (at least in my region), part of the electricity bill is based on the top 3 hours of consumption each month. However, all consumption between 22:00–06:00 is counted at only half value. Because of that, I charge at full power (in my case 3x16A) during the night hours. But during the day, I’d like to limit the charging current to 3x7A. I have my SmartEVSE fully integrated with Home Assistant and want this logic to be controlled from there. Taking it a step further: I also have solar panels, so ideally I want SmartEVSE to charge as much as possible during the day – but only if the import current (measured from the P1 meter) stays below 3x7A. Anyone have a smart way to achieve this with HA? — Reply to this email directly, view it on GitHub <#230>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AY5GJNDV6SLVFXDESGBGIVT3BLGBNAVCNFSM6AAAAAB6K5ISGWVHI2DSMVQWIX3LMV43ERDJONRXK43TNFXW4OZYGM4TSMBTGE>. You are receiving this because you are subscribed to this thread.

[mif11k]

If you want to charge over day from grind and not from solar, than you can use SmartEVSE Override Current to limit charging power.

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On 1. 6. 2025, at 12:31, Michal Fikejs ***@***.***> wrote: Hi, This is a similar problem to my feature request related to possibility to adjust the value of Max Charging Current via Home Assistant. I think this si the only way to solve it. I used to change this value on SmartEVSE 2 via modbus directly, but in the SmartEVSE 3 and HA integration there is no way to modify this value. This might be time to reevaluate the possibility of adjusting the Mach Charge Current via Home Assistant in such scenarios. > On 1. 6. 2025, at 12:06, Xnygra ***@***.***> wrote: > > > Hi all, > > I know there are probably many ways to solve this, but I’m curious – how have you approached it? > > Here in Sweden (at least in my region), part of the electricity bill is based on the top 3 hours of consumption each month. However, all consumption between 22:00–06:00 is counted at only half value. > > Because of that, I charge at full power (in my case 3x16A) during the night hours. But during the day, I’d like to limit the charging current to 3x7A. I have my SmartEVSE fully integrated with Home Assistant and want this logic to be controlled from there. > > Taking it a step further: I also have solar panels, so ideally I want SmartEVSE to charge as much as possible during the day – but only if the import current (measured from the P1 meter) stays below 3x7A. > > Anyone have a smart way to achieve this with HA? > > — > Reply to this email directly, view it on GitHub <#230>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AY5GJNDV6SLVFXDESGBGIVT3BLGBNAVCNFSM6AAAAAB6K5ISGWVHI2DSMVQWIX3LMV43ERDJONRXK43TNFXW4OZYGM4TSMBTGE>. > You are receiving this because you are subscribed to this thread. >

[erikplestenjak]

I needed the same thing, so i corrected HACS integration to also allow changing the "grid-capacity" with home assistant. I'm not using it, just gave it a try. The modification never got merged, so you can upvote the pull request i guess: dingo35/ha-SmartEVSEv3#36

So by setting the grid capacity, you are telling how much power can be taken from the grid. The rest is handled by the EVSE anyway. Since the thing changing between "consumtion-blocks" is hov much power you can take from the grid, i think it's best setting that value.

After getting it as a settable value in the home assistant it's jut a matter of setting up the automation for changing capacity.