If you're purposely looking for a small inverter generator, take a look also at the Earthquake IG800W. Power-wise it's in-between the much-loved EX650 and the 1000 VA inverter generators, but is by a wide margin the smallest and lightest of the bunch. For battery charging you need to be able to throttle the power converter draw. With a PD9160 the generator maxes out in the low 30 amps of converter output, at sea level and moderate temperature. It's smaller than the 1000 VA inverter generators, and weighs only 20 pounds. Output voltage stability with load changes is very good. Noise-wise it's a bit louder than the eu2000i pushing the same load, and based on forum reports is certainly louder than the EX650. The EX650's big drawback besides low availability is that it's about the same size and weight as the eu2000i. There's no chance of it running a standard circular saw. It does run a 6 amp reciprocating saw fairly well, you just need to not keep the saw heavily loaded for more than a few seconds at a time.
For a user report, I've had an IG800W for about 4 months. It starts and runs well. At home it sits next to an eu2000i. Whenever it will work for the job at hand I choose it over the eu2000i 100% of the time because it's so darn easy to carry around, and to get in and out of the RV storage compartment. Cost is in the $300 ballpark, available at Amazon and a few other outlets.
