[RE-wrenches] Combining Solectria PVI 2500 with SB3000

[Dave Palumbo]

Dave,

Very good. Thanks for the pick up on the 650A Service Disconnect issue.

Dave Palumbo

-----Original Message-----
From: re-wrenches-bounces at lists.re-wrenches.org
[mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Dave Click
Sent: Thursday, April 19, 2012 1:39 PM
To: re-wrenches at lists.re-wrenches.org
Subject: Re: [RE-wrenches] Combining Solectria PVI 2500 with SB3000

This is fine; your PVI2500 is rated for 10.4A, while the SB3000 is 12.5A.
You can put up to 24A rated current through your 30A fuses. 
Though the disconnect isn't technically a service disconnect, I'd recommend
using a 60A rated (fused at 30A) disconnect per 230.79(D). You would run a
neutral to your combining panel and I'd recommend a "PV SYSTEM ONLY; NO LOAD
CIRCUITS TO BE ADDED" placard on that. Otherwise that'll be an electrician's
first choice when wiring up the new 40A hot tub.

I think something like the Cutler-Hammer BR24L70RP panel may be a good fit,
and it would replace your fused disconnect. It only has space for two 2P
breakers (no main).

On 2012/4/19 12:29, Dave Palumbo wrote:
> Wrenches,
>
> We have an installation in place since 2008 working well with a 
> Solectria PVI 2500 feeding a supply side grid connection.
>
> Homeowner wants us to double the system size now. I can buy a SB3000 
> inverter for $ 300 less than the Solectria PVI 2500 (with upcharge for
> 10 yr warranty) and I'm inclined to go with the Sunny Boy.
>
> We would add an Inverter 240Vac combiner load center before our 30A 
> Fused Disconnect. I would think that it would be OK to combine the 
> 240vac outputs of different inverter manufacturers and sell into the 
> grid but never having done this I wanted to run it by you folks. The 
> SMA phone tech didn't seem to be the most experienced person and after 
> I spoke with him for a minute I had him saying that it should work fine.
> But wanted to check with more experienced people.
>
> One wrinkle is that the Solectria does not use a Neutral, but the 
> Sunny Boy does. Again, I don't think that this will any problem.
>
> David Palumbo
>
> Independent Power LLC
>
> 462 Solar Way Drive
>
> Hyde Park, VT 05655**
>
> */www.independentpowerllc.com /*
>
> NABCEP Certified PV Installer
>
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>
> 24 Years Experience, (802) 888-7194
>
>
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