Far more of an issue is synchronising the frequencies and putting crap on
the local supply or even creating RFI from the inverter in my experience,
which is not much here, but from those who rushed out and got it, there have
been issues.. grin.

Brian

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From the Sofa of Brian Gaff Reply address is active
"John Williamson" wrote in message
...
jim wrote:
Please, can someone kindly elucidate how a domestic 240V house system
maintains a stable voltage when connected to an FIT inverter fed from a
pv panel?

One moment it's feeding amps into the local supply, the next it may be
extracting them. To get a reversible current flow, there must be a pd
(potential difference) between the 2 situations. How does it do this
trick? (and avoid flickering lights etc).

Are mirrors involved?

It's all low impedance connections, so you need quite a large current
change to make a noticeable difference in the suply voltage. Anything
other than incandescent light bulbs or very old, non-stabilised power
supplies for TV sets won't really notice less than about a 10% change in
voltage anyway, which should need a current change of 100 amps or moreif
all is in order. As most domestic PV panel sets can't generate more than
about 16A, it's not a problem.

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Tciao for Now!

John.