I think sticking on to the original thread here "making generator from 2 wheeler engine" inverter seems the easiest way out.
Someone said it is not a good idea as it causes losses. I agree that commutator w'd cause generation losses but if not then we have to have an isochronous governor for controling engine RPM else frequency w'd hunt. I don't know what w'd a governor for 7 bhp engine cost but since i have an inverter I won't spend anything extra. At the most i have to let go some powere developed.And as far as inverter itself is concerned it is a solid state electonics device meaning no moving parts ar no heating elements / filaments as in olden vacuum tube devices. Hence there can't be any losses in the inverter itself.
Other solution suggested, using 3 phase generator, is impracticle for me. I mean the entire home is wired for single phase. To use 3 phases i have to get it re wired. Also if one phase is connected to say refrigerator which cuts in and out there will be substantail phase imbalace in alternator. Moreover when we are talking on 3.5 kw power, power per phase w'd be too tiny to be useful.
What's ur opinion rohit.
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