Since grid-tie inverters sell back with a power factor of 1, the load
~should~ be entirely resistive and
not inductive or capacitive so a appropriately rated relay contacts
~should~ be fine.
Except maybe if the inverter is designed to supply VARs like the last
Solar-Pro magazine talks about.
(haven't actually read that article yet but I assume that's what it is
about)
Of course, others may have different experiences so I would listen to them.
I prefer to use a somewhat over-rated relay.
boB
On 6/16/2014 7:05 AM, Drake wrote:
Hello Wrenches,
Do the relays that break the current from the direct grid tie
inverters, in AC coupled systems, need to be motor rated or can they
simply be rated for the amperage of the inverter output? How inductive
is the current between the two inverter systems? Will the current tend
to jump the contacts on a non motor rated relay, or burn them out
prematurely?
Thanks,
Drake
Drake Chamberlin
/Athens Electric LLC
OH License 44810
CO License 3773
NABCEP Certified Solar PV
740-448-7328
/http://athens-electric.com/
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