Jai Haissman wrote:
Thanks for the reply Martin!
We are trying to scale the batteries and inverter for maximum
efficiency. I will investigate the inverter options further if 48v
battery charging is more efficient. You mention that battery
inefficiency isn't that bad if charge/discharge is done at sane rates.
Can you elaborate on this? We expect about 5-10Kw/day use. Perhaps the
number of batteries will affect the rate of charge. We do not intend to
run 12v loads off this system, so it seems to follow from your
recommendation that 48v is most advisable to run.
You should have a charge controlling device on your battery pack.
Batteries are mysterious devices, you most certainly don't want to just
guess to see if they're charged correctly. By 'sane rates' I mean don't
run 500 amp discharges too often, and don't charge them at that rate
either, just common sense type stuff. I don't know how big the capacity
of your batteries are either, so I can't really say.
This webpage will become very helpful if you would like to know how to
preserve your batteries:
<http://www.batteryfaq.org/>
In my original email I said 15-30 feet from the house for the gen-set.
You mention now that you aren't going to use any low voltage loads. If
this is the case, you can move your battery pack to the same shed with
your generator, but the batteries will last longer if they are kept at a
constant temperature around 60-70 degrees F.
It is possible to keep a generator in a basement with the appropriate
venting, though keeping the noise down would be difficult.
-What is the effect of emission reduction technologies backpressure on
genset function (compression)? Is this a concern? Can anything be done?
If you use car or truck components on a generator there will be minimal
back-pressure. The downside is that something such as a catalytic
converter may not reach its ideal operating temperature.
-Another question: are gensets are less sensitive than auto engines to
the unknowns associated with long term WVO use?
Depends on the gen-set but generally I would say it's about the same.
Car engines may be more picky because of new injection technology, but
in general I would say that they are also made more cheaply - this all
depends on what engine your gen-set has.
-How should the power be conditioned coming into the house to protect
computers and appliances?
If you purchase an inverter that costs you $2000 you will not need any
extra protection, it will probably be better electricity than you get
from your utility company.
Thanks in advance for any replies.
Jai Haissman
--
Martin K
http://wwia.org/sgroup/biofuel/
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