Jay mentions a topic that I've had a question about. Has anybody AC-coupled an induction generator (wind or hydro) with a conventional battery based inverter? On the surface it seems that it would work fine as long as there were appropriate means included in the design to avoid over-charging the battery. Maybe one of you off-grid hydro Wrenches has done this. Thanks for any insights... Phil
On Tue, Aug 25, 2009 at 5:00 PM, jay peltz <j...@asis.com> wrote: > Hi Keith, > Sorry about #4, should have said " pumped storage just isn't practical for > small systems. > > So the long version is that to get away from batteries, you would need > whats called an AC direct hydro. > This hydro would power the AC loads directly, no inverters, no batteries. > What gets tricky is that since the hydro has to power EVERYTHING including > surge it needs to be pretty large for many of todays loads. > So 8 kw would be pretty small ( about a 4kw inverter system ) and 15kw+ not > uncommon for an AC direct system. > Which means you need a lot of water/drop to get this kind of watts from > your hydro. > > In getting away from batteries, inverters etc its a very cost effective and > reliable system, and really about the ultimate system. Typically these > systems run for years, decades without problems, with a bit of maintenance > of course. > > Besides the turbine you need a controller system that will keep the voltage > constant. These use SS controls with diversion loads to keep the voltage > constant under all loads ( within the parameters of the system) so you don't > blow things up when the compressor turns off or on for that matter. > One benefit of these dump loads is that you can make hot water for domestic > and space heating, air conditioning, leave lights on, you name it. > > Hope this makes sense, > > jay > > peltz power >
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