[RE-wrenches] large array on 200 amp service

[gary easton]

Thanks Jason
That's what we do as well so is the supply connection limited only by the
utility and the rating of the conductors feeding the service?

On Friday, September 25, 2015, Jason Szumlanski <
jason at floridasolardesigngroup.com> wrote:

> Supply side interconnection is the only option, usually tapping service
> conductors in main panel between meter and existing main. Without other
> complexities present, it's pretty straightforward. We're running into a lot
> of meter/main combos that don't have conductors that can be tapped (copper
> bus bars between meter socket and main breaker. That has required changes
> of service equipment, which can be pricey.
>
> One thing that you should consider... Just because the service is 200A, it
> doesn't mean the utility transformer can handle the backfeed from a very
> large PV array, especially if a neighbor on the same transformer has a PV
> system. In one extreme case we had a single 25kW pole-mounted utility
> transformer feeding SIX tenant meters at a single property ranging from
> 100A to 200A! We wanted to install a PV system larger than 25kW (about 105A
> rating), and the utility blocked the project, denying the request to
> upgrade the transformer, even at the customer's expense. It was a bit more
> complicated than that, but bottom line it was a pure political/principle
> stance. If we had the legal department the utility does, we probably would
> have fought it.
>
> It's a lesson to check the utility transformer serving the property, not
> just the service rating.
>
>
>
> On Fri, Sep 25, 2015 at 9:10 AM, gary easton <gary at arp-solar.com
> <javascript:_e(%7B%7D,'cvml','gary at arp-solar.com');>> wrote:
>
>> Hello Wrenches,
>> What are folks doing when installing 100A plus of solar into a 200A
>> service?
>>
>> --
>> Gary Easton
>> Appalachian Renewable Power
>> Stewart, Ohio 45778
>> NABCEP Certified Solar PV
>>
>> T: 740-277-8498
>>  www.arp-solar.com
>>
>> “First they ignore you. Then they laugh at you. Then they fight you. Then
>> you win.”
>> ~Ghandi
>>
>>

-- 
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