How about this:
Grid power goes through ATS to the main load center, which has
a 2 pole 60A breaker sending power to AC1. Inverters feed a critical load
panel. Generator's start circuit is removed from the ATS and wired to the
inverters.
Power outages transfer ATS to emergency power position, but
cannot start generator. Main load center is not powered, but the
inverters feed the critical loads. At a programmed voltage or amperage
point, the inverters start the generator, which feeds thru the ATS to the main
load panel and therefore AC1 for charging.
Possible problems: too much load on main panel to leave
power for charging.
Also, does that ATS sense generator input and executes a
time-delay before latching, or does it latch after a time delay from
losing grid power? One allows the generator to warm up, the other
doesn't. Also, are your inverters in sell mode? could we have the
inverters attempting to "sell back" to the generator, and what would that
cause?
The inverter should be able to be connected in parallel
with the ATS, if you wanted the ATS to govern the excersize cycle, but the
inverters can do the same thing with more flexibility.
BTW, why a 12 volt system for a dual SW? The thought of
that much current flowing makes me wince. Hope all the wire near your
shunt is rated 90 degree Celcius or better.
----- Original Message -----
Sent: Monday, February 05, 2001 9:55
AM
Subject: Generator Control- A Doozie
[RE-wrenches]
I have a customer who already had a 22 kW kohler
controlled by a automatic transfer switch. We added solar and a dual SW
inverter system to the house. Due to the size of the existing generator
and existing house wiring configuration I can't run the generator
into AC2 on the SW's. There are loads on the main panel that he would
like to run still that shoudn't be ran of the inverters.
I am trying to figure out a way to prevent the
generator from running when the grid is down and the batteries are
charged while allowing the generator to start when (as) the
batteries become depleted. The customer is adamant about this being
automatic.
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