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Posted by sspence on May 3, 2010, 3:17 pm
 



Using the grid as your battery doesn't help you when th grid is down.
We went 30 days with no grid in the Ice Storm of '98.

Posted by z on May 3, 2010, 4:13 pm
 




Yeah I think a lot of people are looking to grid tie (probably for tax
reasons .. and to get the 5 cents/kwh or whatnot) but also have the
batteries for when the grid is down.

It's best of both worlds if you can afford it.


Posted by David Lesher on May 4, 2010, 1:06 am
 




Bingo. We'll have a propane generator, but it's big, noisy and $$$$ to run
for long.


--
A host is a host from coast to coast.................wb8foz@nrk.com
& no one will talk to a host that's close........[v].(301) 56-LINUX
Unless the host (that isn't close).........................pob 1433
is busy, hung or dead....................................20915-1433

Posted by Josepi on May 3, 2010, 5:55 pm
 

I think the OP is looking for battery backup as a prerequisite spec.

I have a unit all-in-one unit that does all that but only a 3kW unit with
peak cap of 10kW for 120 seconds.



Well the idea of grid tie (called net metering) is that you don't need
batteries. The grid acts as a battery. This is what is attractive to me, I
would not need batteries. And I like that because batteries are expensive
and don't last forever.

I think Xantrex makes one that will also work off-grid? Then you could use a
battery charger I would assume...

Xantrex which now seems to be "Schneider"...
http://www.schneider-electric.com/corporate/en/products-services/renewable-energies/renewable-energies-intermediate.page?q=NNM1:Solar+Grid+Tie+Systems&f3%3ARenewable+Energies&p_function_id 210

Then there are plenty of 120 volt AC or 240 volt AC battery chargers.

And you can get a transfer switch for the generator.



"David Lesher"  wrote in message


Posted by David Lesher on May 4, 2010, 1:04 am
 



And when the grid fails?


If only it were that simple. One big goal is: use solar power
when both on and off grid. I've seen several schemes that just
shut down the PV input when offgrid.

--
A host is a host from coast to coast.................wb8foz@nrk.com
& no one will talk to a host that's close........[v].(301) 56-LINUX
Unless the host (that isn't close).........................pob 1433
is busy, hung or dead....................................20915-1433

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