I've done this on a couple of mega-homes, where load shedding is the only
option to manage loads that exceed the most massive inverter stack possible. As
w/your customer mine did not care for any interface at all and in both cases
they are thinking about rental when away and know that guests will not do
anything but gripe.
We used servo-breakers (one is Sq.D and the other is Siemens) and a PLC
w/current sensors on each sub panel. When current approaches 90% of inverter
output we shed loads priortized w/customer input. When we get to a point of
load shed inconvenience a signal is sent to start the genset(s). The PLC allows
extensive options and load management. For example, of the 17 AC's we never
allow more than 6 on at any given moment and none run more than 15 mins. in any
one hour interval. Allen Bradly (PLC) and SQ.D make very solid and reliable
products and our 1st year has gone w/o issue. The only inteface the customer
has to to press one of 3 keys - A,B or C. each one is a different use scenario.
For example - owner away (minimize all AC's and refrigeration), owner present,
and full on party mode with maximum guests.
The gear is not real cheap or is it crazy expensive, nor is it that complex to
work with and the reliability is high and well proven over many years. From
what I read in this string this is what your customer is looking for.
Good luck!
-jeff o
>From the Solar, Wind and Hydro powered office of Jeff Oldham/Regenerative
>SOLutions
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