# Car charging speed regulating, max 10kw

**URL:** <https://community.homey.app/t/car-charging-speed-regulating-max-10kw/105258>\
**Category:** Questions & Help\
**Created:** [March 1, 2024, 9:30am UTC](https://community.homey.app/t/car-charging-speed-regulating-max-10kw/105258 "2024-03-01T09:30:58Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![JamesPigeon](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/jamespigeon/32/84899_2.png) [@JamesPigeon](https://community.homey.app/u/JamesPigeon)\
**Post date:** [March 1, 2024, 9:30am UTC](https://community.homey.app/t/car-charging-speed-regulating-max-10kw/105258/1 "2024-03-01T09:30:58Z")

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Hi,

I am trying to create a flow to keep me under 10kw for the house. I have 230v 3 phase charger that can supply 28A to the car, 11kw. So based on other things that draw from the house, the charger should dynamicly reduce the power to the car.

I think I have most of the flow, but missing a logic that can set output to be dynamic, but max 25A.  
I am using both tesla charger and the new tesla API.

How do i add the dynamic calculation from wattage to ampere to max speed based on 10kw roof?

 ![image](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/7/f/7f53c29c847006eb511da89732c4e4db3b3b5388.png)