Can not add repository to supervised home assistant

[kolyfan]

Sorry posting this question to this category - did not find proper one.

I'm trying to add repository to home assistant - Supervised version on Rasberry Pi4
When I tried add custom repository via this instruction:
This integration is part of the default HACS repository. Just click "Explore and add repository" to install

I'm getting error in Addon store: "Invalid Add-on repository!"
I tried adding different links:

• https://github.com/bramstroker/homeassistant-powercalc
• https://github.com/bramstroker
• https://github.com/bramstroker/homeassistant-powercalc/tree/master/custom_components/powercalc

Always getting the same error.

Core version: core-2021.12.4
Supervisor version: supervisor-2021.12.2
Thanks.

[bramstroker]

You don't have to add any repository. Go to HACS -> Integrations. And than "Explore and add repositories". Just search for power calc.

.

[kolyfan]

Great thanks. I did not know what is HACS. Now I installed it and installation instructions now clear for me.