[RE-wrenches] AC Combiner with main breaker as system disconnect

[Brian Teitelbaum]

One big omission, in the otherwise fine Soligent white paper, is that the 60A minimum disconnect has to be rated as "Service Equipment". Generally this means a "Heavy-Duty" safety switch or Service-rated load center with Main breaker.

I don't see why an AC breaker panel, with a Main breaker, couldn't act as the PV system disconnect, as long as it's Service-rated, a minimum of 60A, and the utility does not require an external-handle disconnect, lockable in the off position. Many utility companies still do.

Brian Teitelbaum
AEE Solar



From: re-wrenches-bounces at lists.re-wrenches.org [mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Jason Szumlanski
Sent: Wednesday, March 12, 2014 2:14 PM
To: RE-wrenches
Subject: Re: [RE-wrenches] AC Combiner with main breaker as system disconnect

Don't utter the word tap. :)

See:
http://www.soligent.net/documents/HappyLandings_v3.pdf

We usually specify a fusible disconnect for overcurrent protection when grouping the PV AC combiner with the main premises disconnect is not practical.


Jason Szumlanski
Fafco Solar




On Wed, Mar 12, 2014 at 1:31 PM, <kevin at renovusenergy.com<mailto:kevin at renovusenergy.com>> wrote:
I am trying to determine whether an AC combiner panel (for multiple inverter outputs) with main breaker can be also used as the PV system disconnect?

This is for a line tap situation.  I am accustomed to doing these systems with an AC combiner, and separate enclosure for a breaker style, line tap over current protection.

Any thoughts/comments would be appreciated.

Thanks,

Kevin

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