Advise sought for large off grid PV system; 480 volt 3-phase [RE-w renches]

[Brian Teitelbaum]

Hey Steve!

Sounds like an awesome system. 

What did you use for battery banks? I think we would all be interested


Brian Teitelbaum
AEE Solar



-----Original Message-----
From: Steve Wade [mailto:Steve at windandsun.co.uk] 
Sent: Thursday, April 05, 2007 9:43 AM
To: RE-wrenches at topica.com
Subject: Re: Advise sought for large off grid PV system; 480 volt 3-phase
[RE-w renches]



We've just installed a system similar to this to power the Isle of 
Foula located 20 miles into the atlantic off Shetland (The UK's most 
remote inhabited location).
See: Isle of Foula on the Projects section of our website: 
www.windandsun.co.uk.

This uses a 3-phase island network at 3.3kV. Transformers are used to 
step up from generation and down to consumers.
System includes 2 x 25kW diesel generators, a 19.2kWp PV system and 
three 3-phase clusters of SMA SI-4500 Sunny Island inverters to give 
a 54kW 30min rating. Remote monitoring is via a Sunny Control Plus. Hydro &
wind will be added in the future and so far operation has 
been excellent!
Our biggest concern washow the inverters would behave on energising 
the network of transformers & loads - but the inverters hardly 
blinked!

We're now in the middle of a bigger system with two 80kW diesels, PV 
three hydro turbines & wind for the Isle of Eigg.
This uses 4 x 3-phase clusters of SMA SI-5048 5kW inverters (60kW 
total) and I think these inverters should soon be available in the 
US.

Hope this is useful.

Steve WadeWind & Sun Ltd., Humber Marsh, Stoke Prior, Leominster,
Herefordshire, HR6 0NE.
Web: www.windandsun.co.uk


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