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Flexboss 21 Randomly Restarting

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Posts: 6
Topic starter
(@okiesolie)
Active Member
Joined: 2 months ago

Been running all my loads off grid with flexboss 21 and 2 eg4 indoor 14.3 kw batteries fine for at least the past month (Don't have the interconnection inspection and meter yet). Loads are currently running through the Gridboss back up port.

Yesterday though I went to start dryer and immediately kicked the power off for about 1 minute during daylight hours and came back on its own. To add I have ran dryer (4500 watts) and 3 ton ac (3000) before no problem usually and yesterday according to the data all my loads were under 7000 watts.

Then today randomly about 11:30am with my highest load being battery charging 8000 watts, and maybe 600 add on to that with my home load.

Also I will attach a picture of this graph, but my soc was set to charge to 100%, and slowed charging, and then as shown on graph charging much faster shortly before the restart. (Also has been sunny all morning).

I am on software FAAB-2525 and may try to update to the latest released last month EG4_FAAB-2727 (although I don't see this issue mentioned specifically in the change log here

Im guessing but don't know maybe it was charging too fast at too high of SOC?

2026 04 19 11 44 42
2026 04 19 11 43 13
2026 04 19 11 54 19

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Posts: 6
Topic starter
(@okiesolie)
Active Member
Joined: 2 months ago

Also here the inverter data export during that time Fram


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