ito ginamit namin sa mga solar powered sites, pure sine wave talaga, un ibang inverters hindi kaya magpailaw ng fluorescent light, in my opinion mas safe ito dahil sa na simulate nya talaga ung AC.
Cotek inverters are high freq type pure sine inverters, these can run motor based equipment even a.c and ref. But there are larger more durable more expensive low frequency pure sine inverters. They are more durable and can handle more surge then high freq type.
But low freq power inverter consumes more power at no load, around 3-5amp is lost, compared to high freq idle loss of 1-2amp.
For my solar power i use cheapo cdrking modsine inverter to power my house lights, low freq for the ref and genset for the a.c.