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 Post subject: Outback: GTFX/GVFX connection
PostPosted: Fri Apr 13, 2007 3:47 am GMT EthGMT 
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Catfish
Catfish
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Joined: Sun Sep 11, 2005 2:31 pm GMT EthGMT
Posts: 27
Location: Ontario Canada
Does anyone know if you can connect one of these to the grid without the batteries? Then add them later?
thanx


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PostPosted: Fri Apr 13, 2007 8:44 am GMT EthGMT 
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Red Cobra Delta Guppy
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Joined: Sun Jun 02, 2002 1:01 am GMT EndGMT
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Location: Lakeland Florida
No,

The GTFX inverters can not be directly connected to solar panels, they require a charge controller. The Charge controllers as well as the inverter to some extent require batteries.

A cheap/small battery bank will work ( 100ah Wal-Mart Deep Cycle ) can be had for about $250.00 , and give you about 2kWh of backup, this will work OK for smaller installations ( PV ), I have run this way for about 3 years.

If you’re going to run the inverter at full load, gridtie or not you'll need a bigger battery bank, rule of thumb is 100ah battery rating per 1Kw of inverter load or the AC ripple will overwhelm the charge controller/inverters

Also, cheap Lead Acid is high in tar losses, your looking at about 60-70% efficiency power in/power out. The GTFX also, as just a gridtie inverter is at the very bottom off efficiency, about 91% ... and in the charger control losses and battery tar losses and you will be in the low 80% range, compared to current gridtie only units in the 95% range


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