Inverter Wiring - Printable Version +- Wanderlodge Gurus - The Member Funded Wanderlodge Forum (http://www.wanderlodgegurus.com) +-- Forum: Yahoo Groups Archive (/forumdisplay.php?fid=61) +--- Forum: WanderlodgeForum (/forumdisplay.php?fid=63) +--- Thread: Inverter Wiring (/showthread.php?tid=7265) Pages: 1 2 |
Inverter Wiring - Don Spithaler - 10-20-2008 12:42 Guys---I want to set a small freezer in one my outside bays. There is a plug there but how do I wire it to run off the inverter while going down the road? How would I know if it will run off a 1500 W inverter? Thanks Don Spithaler 89 SP 36' Butler, PA Inverter Wiring - Gregory OConnor - 10-20-2008 13:05 unplug the bus from shore and turn the inverter on.Any hot receptical found must thenbe inverter powered. ( I have one bb installed bay receptical that is inverter hot). run a new receptical close to the new fridge from there. Watts devided by voltes = amps. W/V=A .1500/120=12.5. 1500 watt inverter gives 120 volts @12.5 amps max. I bet the fridge has a watt or amp value advertised. I found the biggest amp/watt hog appliance is a coffee pot. Greg94ptCa --- In WanderlodgeForum@yahoogroups.com, "Don Spithaler" > > Guys---I want to set a small freezer in one my outside bays. There is > a plug there but how do I wire it to run off the inverter while going > down the road? How would I know if it will run off a 1500 W inverter? > Thanks > Don Spithaler > 89 SP 36' > Butler, PA > Inverter Wiring - Donald Spithaler - 10-20-2008 13:45 Greg
A toaster is a hog to. My coffee pot & toaster can't be on at the same time with the 1500 W On Mon, Oct 20, 2008 at 9:05 PM, Gregory OConnor <"Gregoryoc@aol.com"> wrote:
Inverter Wiring - Joyce and Richard Hayden - 10-20-2008 14:18 Yep - the toaster and the coffee pot takes a lot and so does the vacuum - my heart stops when my wife vacuums the bus and I watch the battery meters...
Dick Hayden - '87 PT 38 - Lake Stevens, WA
Inverter Wiring - Pete Masterson - 10-21-2008 02:52 The inverters in a BB are set up with their own distribution wiring (separate from the main 120 vac panel). So, follow the output wires from the inverter and you should find a distribution system (possibly with circuit breakers) somewhere nearby. You can 'join' a new wire there (or set up an additional circuit breaker) to run to the location of the freezer. Load: you first need to determine what the general load on the inverter is at present. What devices are attached and how many are used at the same time? It may be that all the available load is (potentially) used up by the existing appliances. Appliances almost always have watt or amp ratings on them (usually on a tag by the manufacturer's name on the back). To ease calculations, convert all ratings to either watts or amps. (Amps x volts (120) = watts or Watts divided by volts (120) = amps) So, a 1500 watt inverter can handle about 12.5 amps in total. You should leave a couple hundred watts (2 amps or so) "free" to allow for calculation errors and electrical efficiency. Motors (which don't "like" certain types of inverters) prefer "true sine wave" power -- something an older inverter may not provide. Motors (the freezer compressor) also draw as much at 50 more power at start up than their rating, so allowance must be made for that, as well. In all probability, the inverter on your coach is already wired up to use most of its maximum rated power for the appliances already attached. I expect, depending on the size of the freezer, that you will find that it draws anywhere from 6 to 8 amps up to around 10 amps. (Remember to add for the brief overload for motor start up.) So, the solution(s) are (1) upgrade the existing inverter from a 1500 watt unit to a 2500 watt, true sine wave unit or (2) add a second inverter of about 1000-1500 watts (depending on the size of your freezer) to handle only the freezer circuit. Keep in mind that the additional 'juice' required for the inverter will come at the expense of the batteries. If you only use the freezer/inverter while on the road, the engine alternator should be replenishing the house batteries to offset the load, but while parked, the house batteries will need to provide the inverter power, and I know from personal experience (I have a home-style 22 cu ft side-by-side refrigerator-freezer) that refrigeration can draw down batteries rather quickly. You may need to consider adding additional house batteries (or otherwise increasing the available amp-hours) to compensate for the additional demand. Pete Masterson '95 Blue Bird Wanderlodge WBDA 42 aeonix1@... On the road at Edinburg, VA On Oct 20, 2008, at 8:42 PM, Don Spithaler wrote: > Guys---I want to set a small freezer in one my outside bays. There is > a plug there but how do I wire it to run off the inverter while going > down the road? How would I know if it will run off a 1500 W inverter? > Thanks > Don Spithaler > 89 SP 36' > Butler, PA > Inverter Wiring - Gregory OConnor - 10-21-2008 04:53 Pete, there is a group of switches that stand between the 120V electric panel and the receptical/appliance. when you power on the inverter I believe the inverter sends 12volts to the On On switch and removes shore/gen 120v (what ever the transfer switch is sending) and paths the power from the inverter.ON1= shore/gen ON2=inverter. If the switch fails one of the inverterpowered paths wont switch between the two choices Wierd thing is I cant seem to understand how the receptical/appliance is then protected. The power no longer rus thru the houshhold style pandnel breaker box but goes directly from the inverter total output source. I guess any leg once powered by inverter then has the ability to draw 12.5 amps (or 30 amps if the individual inverter is a 3600watt). would be good to understand the protection of circuit wires when you add a larger inverter and more demand. Greg94ptCa --- In WanderlodgeForum@yahoogroups.com, Pete Masterson > > The inverters in a BB are set up with their own distribution wiring > (separate from the main 120 vac panel). So, follow the output wires > from the inverter and you should find a distribution system (possibly > with circuit breakers) somewhere nearby. You can 'join' a new wire > there (or set up an additional circuit breaker) to run to the > location of the freezer. > > Load: you first need to determine what the general load on the > inverter is at present. What devices are attached and how many are > used at the same time? It may be that all the available load is > (potentially) used up by the existing appliances. > > Appliances almost always have watt or amp ratings on them (usually on > a tag by the manufacturer's name on the back). To ease calculations, > convert all ratings to either watts or amps. (Amps x volts (120) = > watts or Watts divided by volts (120) = amps) So, a 1500 watt > inverter can handle about 12.5 amps in total. You should leave a > couple hundred watts (2 amps or so) "free" to allow for calculation > errors and electrical efficiency. Motors (which don't "like" certain > types of inverters) prefer "true sine wave" power -- something an > older inverter may not provide. Motors (the freezer compressor) also > draw as much at 50 more power at start up than their rating, so > allowance must be made for that, as well. > > In all probability, the inverter on your coach is already wired up to > use most of its maximum rated power for the appliances already > attached. I expect, depending on the size of the freezer, that you > will find that it draws anywhere from 6 to 8 amps up to around 10 > amps. (Remember to add for the brief overload for motor start up.) > > So, the solution(s) are (1) upgrade the existing inverter from a 1500 > watt unit to a 2500 watt, true sine wave unit or (2) add a second > inverter of about 1000-1500 watts (depending on the size of your > freezer) to handle only the freezer circuit. > > Keep in mind that the additional 'juice' required for the inverter > will come at the expense of the batteries. If you only use the > freezer/inverter while on the road, the engine alternator should be > replenishing the house batteries to offset the load, but while > parked, the house batteries will need to provide the inverter power, > and I know from personal experience (I have a home-style 22 cu ft > side-by-side refrigerator-freezer) that refrigeration can draw down > batteries rather quickly. You may need to consider adding additional > house batteries (or otherwise increasing the available amp-hours) to > compensate for the additional demand. > > Pete Masterson > '95 Blue Bird Wanderlodge WBDA 42 > aeonix1@... > On the road at Edinburg, VA > > > > On Oct 20, 2008, at 8:42 PM, Don Spithaler wrote: > > > Guys---I want to set a small freezer in one my outside bays. There is > > a plug there but how do I wire it to run off the inverter while going > > down the road? How would I know if it will run off a 1500 W inverter? > > Thanks > > Don Spithaler > > 89 SP 36' > > Butler, PA > > > Inverter Wiring - erniecarpet@... - 10-21-2008 07:10 Don, with my house type refer, I can and do drive 4 hours and when I stop for lunch, start the generator, run that for an hour and all is well till I stop for the nite. Worked like that for 3 years, now.
Ernie Ekberg 83PT40 Weatherford, Texas Inverter Wiring - erniecarpet@... - 10-21-2008 07:42 since I don't have an inverter, that was my solution
Ernie Ekberg 83PT40 Weatherford, Texas Inverter Wiring - Donald Spithaler - 10-21-2008 11:02 Pete The freezer that I'm looking at is small. It is 115V / 95W so it would be drawing under 1 amp. Is that right? I would be only using the inverter while going down the road. We don't dry camp any. On the road the only thing on the inverter would be the TV & my laptop. I'm not ready to upgrade the inverter at this time & I don't want to get into that unless I have to. Don Spithaler 89 SP 36' Butler, PA On Tue, Oct 21, 2008 at 10:52 AM, Pete Masterson <"aeonix1@mac.com"> wrote
Inverter Wiring - Donald Spithaler - 10-21-2008 11:30 Ernie That what I'll be doing too. I run the genny at night. Don Spithaler 89 SP 36' Butler, PA On Tue, Oct 21, 2008 at 7:10 PM, <"erniecarpet@aol.com"> wrote:
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