Standby results varied sharply by mode and test, from excellent charge retention to roughly three days with the inverter left on. Output settings matter greatly when idle.
Pros: surge capacity, voltage regulation
Cons: water resistance, ventilation requirements
Idle draw is respectable in some tests, but other measurements and owner experiences were less favorable.
Pros: rated output, peak output
Cons: startup reliability, full-load noise
Idle drain is the most repeated weakness. Leaving AC or DC outputs active can consume a surprising share of the small battery, while Eco mode may shut off loads that...
Pros: rated output, output stability
Cons: over-voltage protection, cold-weather performance
One report describes roughly 1% charge loss every 1.5 hours while idle, which would be poor for emergency storage. Other storage results are better, so unit-to-unit consistency is uncertain.
Pros: power output, rated output
Cons: AC outlet count, repairability