This inverter really is a beast.  The huge transformer in this inverter really is old school that will last for decades if not abused.  Very few electronics in this workhorse.  I much prefer the old school inverters and chargers with the large transformers rather than using electronics, as the electronic versions have always let me down by burning up.  I have been using the little brother PV1250FC for a couple years now without a hiccup.  We have upgraded our solar array plus we've been working the PV1250 really hard so we decided to upgrade to the PV2000FC.