You would be separating the heater load from the hot tub jets right? If you do not then the jets will not run unless the power is on? Seems like a problem if someone wants to use the tub when the gen set is off. --Dave
> Wireless - I have no clue but - Simplest thing that comes to mind is > spring wound timers on the infrared lamps & clock timers. > > Spring wound timers come in lots of âlength of time optionsâ > > Could the hot tubs have a âUse scheduleâ to coincide with the clock > settings? > > > > ---------------------------------------------------------------------------- > > Dana Orzel Great Solar Works, Inc. > > C - 208.721.7003 [email protected] > > Idaho Contractor - # 028765 Idaho PV # 028374 > > NABCEP # 051112-136 www.solarwork.biz > <http://www.solarwork.biz> > > "Responsible Technologies for Responsible People since 1988" > > P Please consider the environment before printing this email. > > > > > > From: RE-wrenches <[email protected]> On Behalf Of > Eric Youngren > Sent: Wednesday, May 23, 2018 1:28 PM > To: RE-wrenches <[email protected]> > Subject: [RE-wrenches] wireless relays for load shedding? > > > > Howdy Wrenches, > > > > I'm working on a generator powered mini-grid for an island fishing resort > in Alaska. They have 3 XW6048 inverter/chargers to charge batteries while > the diesel runs and power the loads from the batteries when the diesel > shuts down. > > > > They have several high power heating loads not typically seen in > battery-based off-grid electrical systems. Two 4kW hot tub heaters and six > 1kW infrared space heaters. We have the 46 kW generator run-times set so > that the infrared heaters are (in theory) powered only while the generator > is running, but the hot tubs are thermostatically controlled and cycle on > and off every 4-5 hours or so. > > > > I want to make it so that these big heating loads can never be powered > from the batteries, and will only come on while the generator is running. > The current plan is to use the Auxillary output 12V terminals from one of > the XWs to control power relays to switch the hot tub circuits, based on > battery voltage triggers. One of those hot tub circuits is fed from the > main panel right next to the inverters so that is easy enough. But the > other hot tub is fed from a sub-panel located in a different building > around 200 feet away from the inverters. Pulling a pair of wires to > control the second relay at that sub-panel is not practical. So, I'm > looking for wireless options that could control a power relay for the hot > tub circuit in the remote sub-panel. Ideally, the control signal would > come from the same AUX terminal so both hot tubs will not receive power > when the battery voltage is below 50 volts or so, which would indicate > that the generator is not running. > > > > I would also like to put the infrared heaters on a similar control system > so that we are not dependent on people remembering to switch off the > heaters before the generator shuts down. > > > > Has any of you done this kind of thing? Any suggestions on equipment or > best practices? THANKS! > > > > Eric Youngren > > _______________________________________________ > List sponsored by Redwood Alliance > > List Address: [email protected] > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/[email protected]/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > > Dave Angelini Offgrid Solar "we go where powerlines don't" http://members.sti.net/offgridsolar/ e-mail [email protected] text 209 813 0060 _______________________________________________ List sponsored by Redwood Alliance List Address: [email protected] Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/[email protected]/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org
