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What do you consider the most importaint feature ?
Cost 26%  26%  [ 6 ]
Inverter Efficiency 47%  47%  [ 11 ]
Communications Options 4%  4%  [ 1 ]
Warrenty 4%  4%  [ 1 ]
Paint Color 0%  0%  [ 0 ]
I think about other things that are importaint ! 17%  17%  [ 4 ]
Total votes : 23
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 Post subject:
PostPosted: Mon Aug 23, 2004 11:28 am GMT ErdGMT 
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Catfish
Catfish

Joined: Sun May 09, 2004 2:05 pm GMT EthGMT
Posts: 49
My fault, I missed the battery requirement in my earlier post.

I did see some info regarding the SMA Sunny Island 4500. The US paper flyer was tagged preliminary which leads me to believe they may be waiting on UL approval. However like the other SMA products it will most likely need a significant amount of 'plumbing'.

For appearance, the cleanest design I've seen with batteries would be the Outback battery cabinet with what looks like a Beacon inverter. Take a look at Page 7.

Sean


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 Post subject: Re: Future inverter designs
PostPosted: Thu Oct 21, 2004 3:43 pm GMT EstGMT 
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Catfish
Catfish

Joined: Sun May 09, 2004 2:05 pm GMT EthGMT
Posts: 49
Rob Larson wrote:
The solution is an inverter per cell. All MPPT logic and power conditioning should be done in a small module (chip?) associated with each cell. The output from these small inverters would be combined on a panel to produce a single output from the panel. All panels should be connected in parallel. Shading, etc., would only affect the output from the shaded area. Multiple orientations would be a no-brainer. Additions to the system could be done in single panel units, and they would not need to be size matched to the rest of the units.


How complex/expensive is the only MPPT technology for a single panel?Would it be at all practical to make a micro MPPT controller that mounts on the back of a panel and outputs fixed 120VDC? The MX60 claims 99.1% converting to 48V at 40A. Turn off the MPPT tracking on the GT-3.0, lock the input to 120VDC and away you go. This would solve the different orientation issue for string inverters while letting the centralized inverter handle the grid-tie, conversion and certification issue.
Each panel could have two MC male connectors and two MC female plugs.

Sean


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