Re: need for sine wave inverters: Most computers, flat screen TVs, etc., (what they often describe as "sensitive electronics") run fine on a MODIFIED sine wave inverter, which is what most generators not labeled as true or pure sine wave are. Many pellet stoves AND UPS DEVICES are much more sensitive, though, and will NOT run or recharge on these generators. Thus, those relying on a non-sine wave gennie may have a nasty surprise come the first big power outage, as could some who rely on recharging their UPS off the gennie. The true sine wave gennies / inverters will be no problem.
I run my Quad Mt Vernon AE through a 2200VA APC brand UPS at all times (originally used as a server backup supply) and it is designed to both put out a pure sine wave and recharge off a modified sine wave generator. It powers the stove for 30-45 minutes until I start the gennie but the battery in it is old. However, we had two lesser quality UPS devices on computers that refused to even function when the same generator was on. We could, however, run the computers plugged into them just fine on the same gennie if we disconnected the UPS devices and just plugged them into the circuit. Needless to say, we ended up ditching those UPS units as they were only good for preserving data long enough to shut down the computers, and we average 3-4 days/year without power as we're at the end of a transmission line and are one of the last 7 houses on it (so often last on the power co. list). But this is a common and known problem with both pellet stoves and UPS devices, and I note it hear in hopes no one gets surprised this winter.
My solution going into this winter is an AGM deep cycle battery for the Mt Vernon (they are designed to run with one attached as a backup, and it will run for about two days on it in manual mode), and I'm considering a couple of add'l deep cycle batteries on a 2000 watt sine wave inverter for my old Whitfield Quest and some add'l overnight needs such as internet, security, TV and fridge (under 1000 watts total). That would allow me to shut down the gennie overnight, saving fuel and noise. Will keep everyone posted as / if this is implemented.