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was beginning another off grid pre-PTO test powerwalls started at about 28% .. so main breaker off simulate power out / turned on breaker to solar / turn on pv converter all night before .. batteries should have easily got me till dawn when i could produce from pv .. so just at sunrise power "shut down" to house .. i looked at teg flow (i do not have access to tesla app only teg's wifi ) batteries showed 10% / X thru grid cause off / zero pv production cause pre dawn but nothing flowing on diagram / fairly positive walls did not shut down due to load (nothing significant kicked on) system is set to "self consumption" with 33% reserve according to teg and i cannot change these.
So why would power walls stop providing power at around 10% showing on teg with no grid access / no pv production other than more load than they could provide? (again do not think this was case since nothing unusual running / did not have to reset power walls... i turned main breaker back on .. then later went back off grid same procedure batt at 12% and climbing from pv and worked fine again)