Had Generac for YEARS! (LP gas) YUGE tank
My wife pays in advance for the whole year. Saves a bunch, guaranteed a fixed price. Regular deliveries.
Installed it myself, although being a former HVAC guy, it was not hard for me.
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I installed my own small Generac (16kw) but have never had to use it. My solar with battery backup has always been more than I needed.
Todays energy prices make my decision to go solar seem pretty wise now but back when I did it some people thought I was nuts.