ST performance [RE-wrenches]

[Bill Brooks]

Bob-O,

Take out your meter and check 50 homes and to see what the voltage is one
each side of the 240 split phase. The heavier loaded side will always see a
lower voltage. If you have a 120 Volt inverter and have to choose which side
of the buss to install it on--pick the more heavily loaded side. Do you
understand now?

Why are you concerned about feeding power to one side of the buss? What are
you talking about with being "reconsumed" later on? If you are generating 1
kW on one side of the buss and consuming 1 kW on the other side of the buss,
the revenue meter does not turn. Net instantaneous power flow is zero.
That's what counts. You sound like a utility engineer wanting to stop PV on
the grid. I've heard the very same arguement from several utility engineers.
However, I convinced the best utility folks in California that 6 kVA of
120-Volt imbalance is just fine for all residential applications in
California. It's not just a good idea, it's the LAW in California.

Bill.


-----Original Message-----
From: Bob-O Schultze, Electron Connection
[mailto:econnect at snowcrest.net]
Sent: Tuesday, July 10, 2001 5:13 AM
To: RE-wrenches at topica.com
Subject: RE: ST performance [RE-wrenches]


Bill,
Huh? The LOWER voltage side of a 240vac buss? Pardon my ignorance.
Just what the hell are you talking about? You've got two, separate,
117vac legs 180 degree out of phase with a common neutral. What, turn
on all the loads in the house and see which side has a higher voltage
drop? What's up with that?
Granted that while feeding 1/2 of the main panel any extra power
would scoot out to the grid and be "re-consumed" later on, but the
fact remains that with a 120vac feed from a single inverter, you feed
one and ONLY one side of your mains.

Bob-O

>Bob-O,
>
>No assumption. One 120-Volt inverter, pick the lower voltage side of the
>240-Volt. Two 120-Volt inverters, one on each side of the split-phase.
>
>We have over 1,000 120-volt single inverters on the grid in
California--come
>visit some time.
>
>Bill.
>
>-----Original Message-----
>From: Bob-O Schultze, Electron Connection
>[mailto:econnect at snowcrest.net]
>Sent: Thursday, June 28, 2001 9:35 AM
>To: RE-wrenches at topica.com
>Subject: RE: ST performance [RE-wrenches]
>
>
>Bill,
>You assume two or more inverters, not always, or even mostly,  the case.
>Bob-O
>
>
> >Bob-O
> >
> >120-Volt inverters are put on opposite sides of a 120/240 breaker panel
in
> >the same balanced way that we take loads in a balanced manner from a
> >busbar--no problems. All house circuits get the benefit regardless of
which
> >side of the busbar the systems are on. KWh's are the same whether
produced
> >by a 120-Volt source or a 240-Volt source.
> >
> >Bill.
>

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