Balcony Battery Storage with Local API

Hardware
1

I am looking into buying a battery station for my balcony solar system. I have found a lot of solutions that have a lot of problems, one of the biggest one being that the manufactures just love locking you into their cloud and their eco system…

Does anyone know a brand that allows you to access the API from from within home assistant without going through their cloud?
I also want to be able to control the power output of the battery.

Manufatures I have looked at:

  • Anker: cloud lock-in, also with the HA integration you cannot control the power output I believe?
  • EcoFlow: same story
  • Zendure: not sure, but you need to use their inverter (I already have one)
  • SunLit: no integration whatsoever, need to use their app
  • Marstek: local API possible, but you cannot control the power output I think
  • Growatt: no idea, could not find anything regarding a HA integration
  • Hoymiles: no idea whether it has a local API

Does anyone have more information? What kind of batteries are you using with HA?

3 Likes
2

I‘m in the exact same boat. Just recently identified Marstek as a potential candidate. Did You by chance clarify on Your doubt? (If output can be controlled)

3

Tracking this post as I’m also interested. I haven’t bought any hardware yet.

4

RS485 output? They are common on PV systems and can quite easily be connected through esphome.

5

Any developer here that wants to work on the new local API for marstek devices?

6

@BentiGorlich I am not sure if you made further progress on this. I am also looking into balcony battery solar systems. One that looks promising with a HA API is the Solarkon One. It seems there is a HA integration here: GitHub - solakon-de/solakon-one-homeassistant

I have not tried this myself, still researching.