In the last list someone mentioned putting the transformer behind the
pressure switch for the well pump so it won't be sitting there idling
24/7. It's a good idea, but watch out for the double surge. When the
contacts close you'll get a surge load from the well pump trying to lift
a column of pressurized water, but also a surge from the transformer as
the coils energize. I have seen a few inverters have trouble handling
that stacked surge. If the inverter is significantly oversized compared
to the pump/transformer it will be ok. Otherwise you can get a time
delay relay that waits a second (or so) after it gets actuator power
before energizing. In that case you'd want to adjust the pressure switch
to come on a few PSI higher than usual so the customer doesn't
experience a momentary loss in pressure.
Best,
Hilton
--
Hilton Dier III
Renewable Energy Design
Partner, Solar Gain LLC
453 East Hill Rd.
Middlesex, VT 05602
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