Down-sizing battery systems [RE-wrenches]

[Joel Davidson]

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In 1998 a lot (perhaps as many as 20%) of California Energy Commission 
Emerging Renewables rebate net metered PV systems were owner-installed 
battery systems with Trace/Xantrex SW-series inverters. Now almost all 
California Solar Initiative PV systems are non-battery and contractor 
installed. The 1500-watt Siemens array and Sunny Boy inverter that I added 
to my home last July was the first owner-installed CSI rebate system in 
Southern California Edison territory. California urban and suburban 
residential PV is now like the residential HVAC business - salespeople sell 
it and licensed contractors install it.

Battery guys stay young by avoiding deep discharges and equalizing 
regularly.

Joel Davidson

----- Original Message ----- 
From: "Allan Sindelar"
To: <RE-wrenches at topica.com>
Sent: Thursday, January 31, 2008 7:18 PM
Subject: Re: Down-sizing battery systems [RE-wrenches]


>
>>Us old guys who still understand batteries are getting rare!<
> Yes, Doug, and us rare guys who understand batteries are getting old.
>
> ----- Original Message ----- 
> From: "Doug Pratt"
>>
>> Hi Jay,
>>
>> I'd estimate that 95%+ of grid-tie systems going in now are direct
> grid-tie.
>> Us old guys who still understand batteries are getting rare!
>>
>> Doug Pratt
>> DC Power Systems


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