Grid offseting system for 10-12 homes, Colorado [RE-wrenches]

[William Korthof]

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How about using a master-meter setup, a single battery bank,
one set of inverters, and an AC meter for each home....

A single larger utility service (eg, 200-400A, 120/240VAC, 1 ph)
would feed (backup) 4 to 8 Outback inverters, as needed for load.
About four MX60 controllers for the solar array. Size the battery
pack based on the desired amount of backup capacity (probably
small, say 400Ah). The inverter outputs would then feed each
home with standard 120/240 service entrance (100A each) and
a sub-meter.

Each home would pay for their share of the total power cost
Customer's $ = (submeter use / gross use) * (utility bill +
amortized PV cost +/- a base fee).

This configuration would be simple and mostly conventional to
build, provide standard power to the homes, provide the option
of extra backup power if desired, provide the best solar fraction,
allow you to use or avoid net metering, allow future expansion,
and keep system maintenance costs as simple and low.


/wk


At 02:02 PM 3/18/04 -0700, Jeremy Rodriguez wrote:

>Greetings!
>I am trying to put together a system or systems for 10-12 homes that would 
>be grid connected and use pv to offset the loads.
>The plan would be to erect a 10-12kw array on a large concrete wall. The 
>local utility company says that we would have to have a huge liability 
>policy since we would be considered our own power company!? With that in 
>mind I'm talking to the developer about using an SW plus inverter at each 
>home with a minimal battery bank. By using the utility to keep the 
>batteries at float level, anything generated by the RE source would then 
>be used to offset the loads of the house, correct?  Forget about using a 
>Sunny Boy for now, unless we can get utility approval.
>How big of inverter would you suggest? How about Outback inverters?  Any 
>help or info would be appreciated.
>
>Jeremy and Amy Rodriguez
>All Solar Inc.
>1463 M. St
>Penrose, CO 81240
>719-372-3808
>800-499-4055
>www.asolarelectric.com
>
>
>[Non-text portions of this message have been removed]
>
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