If you are doing it on the AC side, a Generac transfer switch has the
capability and is designed to do this. It's easy to rig an interface as I
discussed privately with Bill.
On Fri, Nov 29, 2019 at 1:29 AM Jerry Shafer
wrote:
> Wrenches
> Need to be careful here to use something that has the
Wrenches
Need to be careful here to use something that has the interrupt KVA rating
required to prevent an arc in the event of an under load opening with the
switch proper AIC rating 10,000 or more, last thing I think you want is to
have that kind of liability on products that are not designed for
If you only want to change over, why not use a contactor with three poles,
a NO and NC contact? that will switch instantly. Use Utility to power the
coil, it will switch to utility when the power is restored.
On Tue, Nov 26, 2019 at 2:57 AM Jerry Shafer
wrote:
> There is the SMA Automatic
Hi Bill,
We just did something like this with a hydro plant and backup solar site.
We ended up using a Kohler RDT transfer switch with the accessory board.
With the accessory board, its possible to adjust down to about ~1 second
transfer, and without the accessory board, its ~3 second transfer.
There is the SMA Automatic transfer switch if you go with the SMA battery
inverter and SMA pv inverter, it can be located seperate of the battery and
inverter and will take up to 30 kwhrs. of capacity
Just a thought
On Mon, Nov 25, 2019, 10:52 PM Bill Hennessy wrote:
> hi folks--
>
> We're
hi folks--
We're installing a grid-tied, battery backup system on a farm where the service
entrance is on a pole in the yard. At the single-phase, 240v, service entrance,
there are two main breaker subpanels--one going to the house and one to the
barn. The buildings are each about 100 feet away
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