Hi, There are several different ways to accomplish this via RF signalling.
One discussed before here is to use the IO-WRP kit from supplyhouse.com. I did exactly what you want (disconnecting an inverter feed remotely when the generator started) using this kit and relay / contactor. And check out offerings at https://www.rfsolutions.co.uk/. I just set up a wireless genny start / stop from the dry contact of a Fortress Envy, with one of their xmitter (Bogeyboard) and receiver (Quanta) pairs. @ about 1/2 the price of the IO-WRP setup. The Rfsolutions stuff is quite versatile, just about anything can be told to turn on or off, based on one or more 0v inputs. A wide variety of function inventory to choose from. A found the products I needed in stock at Digikey and Mouser, respectively. On Thu, Jun 20, 2024 at 2:35 AM William Miller via RE-wrenches < [email protected]> wrote: > Friends: > > > > I have an installation of 12 Enphase IQ inverters that is downstream from > a generator transfer switch. During power outages the generator will run > poorly when the Enphase is on and the sun is shining. The problems go away > when the Enphase is shut off. No surprises about this. > > > > The Enphase is installed on a barn about 150 conduit feet from the > generator transfer switch. My plan is to create a low voltage signal when > the generator is running and send it to a coil on a contactor in the barn. > Said contactor will disconnect the 12 micro-inverters. > > > > There is existing one 26 AWG pairs of a Cat 6 cable running between the > buildings. I have found a two pole, 30A contactor that draws 7 watts on > the coil. The voltage drop calcs on 150 feet of 26 AWG wire shows a 24 > volt signal will not cause excessive voltage drop (~4%). > > > > Here is where I am uncertain: Should I run 24 volts AC or DC? My concern > about DC is if there are any damp connections, electrolysis will occur that > might erode the 26 AWG conductors. We’ve all seen powder where copper used > to be. Is AC less susceptible to electrolysis? My research has turned up > no pertinent conclusions. > > > > Thanks in advance. > > > > William Miller > > > > Miller Solar > > 17395 Oak Road, Atascadero, CA 93422 > > 805-438-5600 > > www.millersolar.com > > CA Lic. 773985 > > > > > _______________________________________________ > List sponsored by Redwood Alliance > > Pay optional member dues here: http://re-wrenches.org > > List Address: [email protected] > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > There are two list archives for searching. When one doesn't work, try the > other: > https://www.mail-archive.com/[email protected]/ > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > http://www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > http://www.members.re-wrenches.org > > -- *Kirk Herander / **[email protected] <[email protected]>* *Owner|Principal, VT Solar, LLC* *Celebrating our 33st Anniversary 1991-2024!!* dba Vermont Solar Engineering 802.559.1225
_______________________________________________ List sponsored by Redwood Alliance Pay optional member dues here: http://re-wrenches.org List Address: [email protected] Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org There are two list archives for searching. When one doesn't work, try the other: https://www.mail-archive.com/[email protected]/ http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: http://www.re-wrenches.org/etiquette.htm Check out or update participant bios: http://www.members.re-wrenches.org
