Solar Powered Air Con- possible?

[SunEagle]

Yeah but so what? The generator is not causing the distortion which is meaningless, it is the load equipment causing it. Care to guess what the utility supplies?

I believe the Utility is only supposed to meet the IEEE Std 519-1992 of < 5% THD. And you are correct that most distortion is generated by PWM power supplies on the loads.

[Sunking]

I believe the Utility is only supposed to meet the IEEE Std 519-1992 of < 5% THD.

Winner Winner Chicken Dinner. Just about every residential whole house and commercial genny does that. Heck even some Gas portables like Honda "iAVR" system beets that. It comes down to design and matching components up that work with each other.

[ChrisOlson]

Not intentionally it was painting all generators with a broad stroke which has now been done by the OP. In off grid application THD is pretty much meaningless because the generator feeds a battery charger which in most designs is very tolerant of THD.

That would only be the case with a generator just driving a charger. In systems (more typical) where the power passes thru to loads and the inverter can either charge batteries with excess or switch to invert mode to assist the generator with loads (Generator Support Mode), THD becomes a very real issue in keeping the generator qualified on the inverter. And sometimes in getting it to qualify at all.

We always figured that if we could get 5% THD at rated prime from a genset, that's about as good as it gets. But the point is that "thumpers" that deliver uneven torque do not make good prime movers for AC gensets. They're fine on DC.
--
Chris

[dkpro1]

RV Gen.

yes, they do need a bit of work to quiet them down. Personally I'd rather hear the thump thump of a Listeroid than a quiet modern high rev engine. Listeroids aren't so portable tho

THEY MAKE ME WANT TO PUKE CANT STAND THEM......

[FunGas]

I built a PV/Peltier based cooler for the workshop.

If you're going to cool more than 50m³, forget it, use a generator.

My workshop is about 30m³, with a 150W panel, it cools about 10-15 degrees - not much when the ambient is over 40 degrees.