[RE-wrenches] SolarEdge Optimizer - Was: Tigo and SMA AFCI - Was: AC coupled, grid-tied Sunny Island - contactor & bypass

[Steve Higgins]

Steve Higgins
Technical Services Manager
M: +1.206.790.5840
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Surrette Battery Company
Exclusive manufacturer of
[cid:rolls600f99]<http://www.rollsbattery.com>

From: Richard L Ratico
Sent: Wednesday, June 5, 2013 6:44 PM
To: re-wrenches at lists.re-wrenches.org
Reply To: RE-wrenches
Subject: Re: [RE-wrenches] SolarEdge Optimizer - Was: Tigo and SMA AFCI - Was: AC coupled, grid-tied Sunny Island - contactor & bypass


SolarEdge makes an optimizer / inverter system. We just installed one. Our
clients are happy. So are we.

Don't know if you can AC couple the inverter. Their website says they are about
to release a version of the optimizer that will work with other manufacturer's
inverters.

Dick Ratico
Solarwind Electric

--- You wrote:
On 6/5/2013 3:33 PM, SunHarvest wrote:
> Just an FYI for anyone wanting to use Tigo optimizers with SMA
> inverters incorporating AFCI -
> According to SMA the Tigo optimizers will not operate with the SMA
> inverters. They didn't go into detail. They just said the AFCI feature
> of the Sunny Boy is not compatible with Tigo. After further discussion
> they acknowledged that disabling the AFCI feature in the Sunny Boy
> would allow compatibility with the Tigo optimizer. Awesome.
> After talking this over with Tigo they came to the same conclusion but
> neither company seemed too happy or confident in the marriage. Awesome.
> Eric Stikes
> SunHarvest
>
> ----- Original Message -----
> *
>
> Wrenches,
> Here's an update on this configuration (20kW Enphase, AC coupled to
> Sunny Islands) you should know about:
>
> Enphase will not support and warranty the use of their micro inverters
> in an AC-coupled installation with battery-based inverters. Enphase
> approved this verbally with us in design, but balked when we asked
> them to back it up in writing. Their issue/point is that AC-coupling
> violates the UL1741 listing.
>
> Thus, we're revising the design to use Sunny Boy string inverters. Our
> customer would still like the module-level monitoring and optimization
> offered by the micro-inverters (there is some shading issue), so we're
> considering using string optimizers. We have not used string-
> optimization, yet. It looks like the leading options are Solar Magic
> and Tigo.
>
> Any preferences, cautions, or advice with choosing and using
> optimizers would be appreciated.
>
> Thanks,
>
> -Kelly
>
> Kelly Keilwitz, P.E.
>
--- end of quote ---
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