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

Andrew Truitt atruitt at gmail.com
Thu Apr 5 11:41:10 PDT 2007


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He used 3 banks of 15 x 4V Rolls Solar RB-4KS21PS (I was just reading
it on his website) for the smaller system.  They built a ground mount
there in "wet peat" earth at a site with a max wind speed of 173 mph!
Steve - how deep did you sink your piers?!?!

Andrew Truitt
Standard Solar Inc.



On 4/5/07, Brian Teitelbaum <brian at aeesolar.com> wrote:
>
> 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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