This unit has been surprising. Though it is a PWM, it packs a punch. I've tested it using 2 lead acid batteries but plan to try LifePO4 and change the setting on the unit. I've just about maxed out the solar for it and staying within the spec's. Still got to make some adjustments and add more breakers for safety. So far I've been able to run a washing machine, various shop saws (table saw, chop saw, grinder, sanders, vacuum and other) through out the day with success. LED type of lighting, no problem. On a nice sunny day, most of the 120 volt power is off grid. Still testing but so far it's been great. Hope it is long lasting.