Thanks Mac and all,
I agree that putting the PV in a panel supported by the genset is not desirable. These are genset retrofits where the customers are hiring generator companies. I'm looking to avoid issues before they happen. Fortunately all customers (so far) are looking into or have purchased Generac which according to Mac has a Smart Management Module (SMM) option/accessory which may be the easiest solution. If the x-fer panels have a tap on the line side for the PV that would be best solution. I looked at one install today of a 400A Generac X-fer panel and it did not have line side tap. Most generator companies have no clue about how solar works and so we're doing some educating (or at least attempting) and research of our own. Thanks for all of your input! Wayne Irwin, President License #CVC56695 State Licensed Solar Contractor Pure Energy Solar International Inc. wa...@pureenergysolar.com<mailto:pureenergyso...@hotmail.com> <http://pureenergysolar.net/>http://PureEnergySolar.com http://SolarChargingStation.net<https://solarchargingstation.net> 352 377-6527 Office 352 336-3299 Fax The Sun Is Always Shining! The content of this message is Pure Energy Solar Confidential. If you are not the intended recipient and have received this message in error, any use or distribution is prohibited. Please notify me immediately by reply e-mail and delete this message from your computer system. Thank you. ________________________________ From: RE-wrenches <re-wrenches-boun...@lists.re-wrenches.org> on behalf of Mac Lewis <maclew...@gmail.com> Sent: Friday, January 12, 2018 8:35 AM To: RE-wrenches Subject: Re: [RE-wrenches] Adding generators to PV systems Hi Wayne, As Tump suggested, getting the solar out of the load center served by the generator is a great way to go. You can also do a relay that opens the solar circuit in the event the generator is operating. Another option that I've used is Generac's Smart Management Module (SMM). These are designed to be load management relays and shed when frequency is dipping under load. However they can also be used to lock out loads during generator operation. I haven't used them for non-Generac generators but I suspect they would work fine. They don't require any communication, the logic is based on the waveform getting sent to the load so they can be situated far away from the transfer switch and generator. On Fri, Jan 12, 2018 at 3:44 AM, Tump <t...@swnl.net<mailto:t...@swnl.net>> wrote: 2 suggestions; the first is installing the GT inverter output on the utility side of the T switch ( Manu’s recommended spot) . The second is have the generator tech set the frequency a bit lower then 59.5 Hz. (57-58 Hz.) which is usually the lower spot where the GT inverters will latch on and begin to output. Make sure that this setting is noted on the generator so the next tech will leave it at this setting. On Jan 11, 2018, at 8:54 PM, Wayne Irwin <pureenergyso...@hotmail.com<mailto:pureenergyso...@hotmail.com>> wrote: Hello All, We have several customers adding generators to their homes on which we have previously installed PV systems. Historically most generators didn't produce a clean enough 60Hz sinewave to get the inverters to feed back. However, with the generator technology improving and the introduction of inverter generators, I'm concerned that if the inverters feed back to the generator it will smoke the stator. I'm wondering if any of you have any experience/issues? If so, what solutions or recommendations do you have? 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