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stmbtwle

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Reply with quote  #11 
Sunny Boys take an input of several hundred volts (mine runs at 350-400) and output 208-240v AC. Not exactly battery friendly.

From what I understand they can be paired with the Sunny Island to get the battery charge capability. When there's not enough sun the Sunny Island takes up the slack from the batteries.

I think a 25kw diesel generator would be a good start (it sets the "grid" and it'll be needed for backup later anyway), and add on grid-compatable solar and battery systems later.

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Solar is like the wind. It may be free, but putting it to work isn't!
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Rick H Parker

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Reply with quote  #12 
The Sunny Island 6048-US has a 130A Charge controller. With four 6048-US, the maximum charging current is 520A and the maximum PV Array is 26.8kW + 7kW on the 7000TL-US-22 for a total of 33.8 kW.

It is looking like the four The Sunny Island 6048-US are enough, he does not need the 7000TL-US-22.

Sunny Island 6048-US specs

Sunny Boy 7000TL-22-US specs.



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Rick H Parker
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stmbtwle

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Reply with quote  #13 
That's fine BUT the Sunny Island CANNOT be connected directly to PV panels. Yes a PV input is mentioned but that's an AC input... and PV panels are DC. He would need charge controllers to charge the batteries, or some means of converting the DC from the panels to AC. A Sunny Boy does that, but being grid tied it wants an AC input for timing. It gets this from the Sunny Island. Then the Sunny Islands convert the 240v output to 48+v for battery charging. Only SMA knows exactly how.

Anyway the whole thing is a no go, as the upfront cost of nearly 200 panels (and related equipment) is said to be out of reach for the client. It's grid, or diesel. Any solar will be an add-on.

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Solar is like the wind. It may be free, but putting it to work isn't!
Willie, Tampa Bay
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