[RE-wrenches] GT inverter

[Brian Teitelbaum]

Jay,

If you use the Aurora 6000, it has two separate MPPT channels, and each channel has dual input lugs, so you could have up to four PV strings without any needed fusing (two strings per channel).

On the 6000, the max input power per channel is 4kW, so you can't just put two strings of 10 modules on one channel (20 x 225W = 4500W), but you could use four strings, with, say 16 modules on one channel (two strings of 8 for 3600W ) and 14 modules on the other channel (two strings of 7 for 3150W ). The Aurora inverters have an adjustable input voltage range that will go all the way down to about 90VDC and still power-point track, so strings of 7 are no problem, even with regular 60-cell modules. There is some loss of efficiency at the lower voltages, but it's minor.

30 of the Sanyo 225's might be a bit high for a 6kW inverter however, so you may want to use two smaller Aurora inverters instead of a single 6000. You will need to analyze how much clipping you might get at the location, and see if the lost wattage is worth the extra cost of using two inverters. Personally, I don't think that an array at 6750W on a 6kw inverter will really see all that much clipping, unless it's in a cold climate. I doubt that the extra cost of using two smaller inverters would be justified.

Brian Teitelbaum
AEE Solar


From: re-wrenches-bounces at lists.re-wrenches.org [mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of jay peltz
Sent: Sunday, November 20, 2011 2:36 PM
To: RE-wrenches
Subject: Re: [RE-wrenches] GT inverter

HI mac,

I like this choice also.

But what is on the market for a TL fused disco?

jay
On Nov 20, 2011, at 1:59 PM, mac Lewis wrote:


I would see if the Aurora 6000 would be a good fit.  I believe it will string but it may clip depending on tilt, orientation and anticipated temps.


Mac
On Sun, Nov 20, 2011 at 2:44 PM, jay peltz <jay at asis.com<mailto:jay at asis.com>> wrote:
Hi All,

Anybody have  a favorite string GT inverter for the following.

6700 watts
30 x sanyo 225 watt

no shading
240v output

thanks,

jay

peltz power





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--



Mac Lewis

"Yo solo sé que no sé nada." -Sócrates

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