Calculate output Watts

Hi
I am a newbie for HA. but i manage to create my own dashboard . I want to get my offgrid battery output power but i have only V and A values. can some some explain to me how to calculate power?

power - volt x ampere.

I wat this Power as a entity

Thanks

You need kWh for the energy dashboard.
First you need to make a template sensor to get what, which means you need to multiple volt and ampere (W=V*A). (Template - Home Assistant)

The you need to make a new sensor from that sensor above that handle the measuring over time to get kWh.
HA has made an integration available for that. (Integration - Riemann sum integral - Home Assistant)

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Thank you wallyr