[RE-wrenches] Paralleling Mutlitple Inverter

[jay peltz]

Hi Rich

If there are no AC loads, only the inverters then there is no derate for the panel buss.
However if you connect any other loads such as a metering device, now you have to apply the 120% rule.

Jay

Peltz Power





On Jan 22, 2012, at 4:53 AM, "Rich Nicol" <rich at solartechvt.com> wrote:

> Good Morning Wrenches,
> I’m wondering if anyone has an advice on preferred methods and component/panel recommendations for paralleling multiple inverters. The proposed system will utilize 4 SMA6000 inverters (100 amps) and will be a ground mounted system with inverters located outdoors in the cold frigid temperatures of Vermont in a farmer’s field so the panel where we complete the parallel connections needs to be outdoor rated (although it will be sheltered from the worst of the elements). It will be a standalone system with a dedicated utility power drop/meter for the system. My understanding of using a load center in this applications is that the 120% rule will apply as it does in a typical installation per NEC690.64(B)(2)with the bus amp rating for the load center based upon the inverter feed side as well as the over current device on the utility side.
> Any input regarding preferred panels and configuration is appreciated.
> Thanks
> Rich
>  
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