Add support for Solarbank 2

[flip-dots]

I might also add support for the Solarbank 3 in this PR or I might do that later.

This is using the latest SolixBLE with the changes from this PR which adds propper support for devices like the solarbank which was raised under this issue.

This branch was created from the Anker prime branch which I intend to merge first so not all of the changes shown are from this branch/PR.

[jul1an-s]

Looking good!
Running through an ESPHome ESP32 Bluetooth proxy

I'll poke around a little bit and will let you know if I encounter any issues.

Edit:
This is f****** amazing :D Thank you so much for this project :D

[jul1an-s]

Just love it when OpenSource stuff outperforms proprietary software.

I'd propose to rename "Battery output energy". This is misleading. It should be "total output energy". If you bypass the battery and directly feed the grid it can be much higher than battery input energy, which is weird ;-)

[siegmund42]

Hi there, I just wanted to give this branch a try since I am annoyed by the very infrequent cloud updates. Connection seems to work fine, but all values are displayed as "unavailable". HA Debug logging gives the following every 3s:

2026-05-26 11:45:43.012 DEBUG (MainThread) [SolixBLE.device] Received notification from 'Solarbank 2 E1600 Pro'. length: 26, packet: 'ff091a0003010f44099f7517bc1973f1eaa1983644ea860275cc'
2026-05-26 11:45:43.012 DEBUG (MainThread) [SolixBLE.device] Pattern: 03010f
2026-05-26 11:45:43.012 DEBUG (MainThread) [SolixBLE.device] CMD: 4409
2026-05-26 11:45:43.013 DEBUG (MainThread) [SolixBLE.device] Payload: 9f7517bc1973f1eaa1983644ea860275
2026-05-26 11:45:43.013 DEBUG (MainThread) [SolixBLE.device] Payload length: 16
2026-05-26 11:45:43.013 DEBUG (MainThread) [SolixBLE.device] Received unknown message of type: 4409
2026-05-26 11:45:43.013 DEBUG (MainThread) [SolixBLE.device] Decrypted payload: a10131a2020100a3020164
2026-05-26 11:45:43.013 DEBUG (MainThread) [SolixBLE.device] Parameters: {
    "a1": {
        "bytes": "b'1'",
        "hex": "31",
        "int": "0",
        "uint": "0"
    },
    "a2": {
        "bytes": "b'\\x01\\x00'",
        "hex": "0100",
        "int": "0",
        "uint": "0"
    },
    "a3": {
        "bytes": "b'\\x01d'",
        "hex": "0164",
        "int": "100",
        "uint": "100"
    }
}

Do you have any hint on what I'm doing wrong or missing here?

[siegmund42]

Nevermind, Solarbank was still connected in the app. Works absolutely fine after removal!

[jul1an-s]

Yep, SB2 accepts only a single connection at a time. Glad you got it to work!