FYI.
This is what my heating pad that is compatible with the JK bms looks like.
Comes from Gobel Power, who supplied my battery cases.
8x 395w Canadian solar (3.160kw)
Planned 20 440w JA solar (8.8kw)
12kw midea ASHP
3152W RE, Whitelaw Brae
3kw solis G98 grid tied
2x 3.6kw sunsynk ecco g99
4x16 280A eve batteries (57kw)