Charge retention is excellent: one unit lost only 1% after sitting unplugged for three days.
Pros: surge capacity, voltage regulation
Cons: water resistance, ventilation requirements
Best Generators for self-discharge rate
Storage results conflict: one test saw only 2% loss over three months, while another report described rapid idle drain. Checking a unit periodically is prudent.
Pros: power output, rated output
Cons: AC outlet count, repairability
Charge retention depends heavily on power state. Fully shut down, the station can sit for months; left on with wireless or outputs active, it may lose several percent or even...
Pros: rated output, output stability
Cons: over-voltage protection, cold-weather performance