Journey with Confidence RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Take a Speed Test Free 7 Day Trial ×
 


Reply
 
Thread Tools Search this Thread Display Modes
 
Old 02-19-2024, 09:21 PM   #1
1 Rivet Member
 
2020 27' Flying Cloud
Norcross , Georgia
Join Date: Feb 2020
Posts: 5
Running both AC/heat pumps on 50 amps, can I run a space heater?

I understand Iím on shore power at 50 amps and my AS has 2 separate legs. I also understand the separate units have their own circuits. And separate from that internally the unit I have is wired for 3 separate 15 amp circuits. My question is, can I simultaneously run a space heater plugged into one of those 15 amp circuits whilst the 2 heat pumps are running? Will my biggest problem be the surge as one of the two heat pumps starts up, or not here is enough amperage for that surge?
JavaJay123 is offline   Reply With Quote
Old 02-20-2024, 05:05 AM   #2
Rivet Master
 
2018 30' Flying Cloud
Springfield , Ohio
Join Date: Jun 2020
Posts: 573
There is only one way to find out.
__________________
2018 Flying Cloud 30RB + 2020 Silverado 2500HD Duramax/Allison
tbrowne is offline   Reply With Quote
Old 02-20-2024, 06:06 AM   #3
Rivet Master
 
2008 22' Safari
Spicewood (W of Austin) , Texas
Join Date: Mar 2015
Posts: 3,021
Read your appliance manuals/pamphlets to discover their amperage draw… and add up the total. For long-term-use, avoid a continuous amp-draw more than 80% of capacity (40 amps). Short term draw of 100% is acceptable (less than ten mins…an example being simultaneous use of a microwave to heat a food item, etc.)
Boxite is offline   Reply With Quote
Old 02-20-2024, 06:39 AM   #4
4 Rivet Member
 
Oak Park , Illinois
Join Date: Mar 2023
Posts: 329
This is why I think having something like this is a good idea:


https://www.progressiveindustries.net/ems-pt-x


Will shutdown power before it become a bigger problem and give you some feedback.
sfranklin is offline   Reply With Quote
Old 02-20-2024, 07:35 AM   #5
Rivet Master
 
1988 25' Excella
1987 32' Excella
Knoxville , Tennessee
Join Date: Oct 2010
Posts: 5,147
Blog Entries: 1
With 100 amps total available I would certainly think you have enough electricity to run a small heater also.
Bill M. is offline   Reply With Quote
Old 02-20-2024, 08:19 AM   #6
Rivet Master
 
jeffmc306's Avatar
 
2019 27' Globetrotter
McHenry , Illinois
Join Date: Apr 2018
Posts: 2,249
Blog Entries: 4
Quote:
Originally Posted by JavaJay123 View Post
I understand Iím on shore power at 50 amps and my AS has 2 separate legs. I also understand the separate units have their own circuits. And separate from that internally the unit I have is wired for 3 separate 15 amp circuits. My question is, can I simultaneously run a space heater plugged into one of those 15 amp circuits whilst the 2 heat pumps are running? Will my biggest problem be the surge as one of the two heat pumps starts up, or not here is enough amperage for that surge?
JavaJay123, the way to avoid the surge of the heat pumps at start up is to install something like the Micro-Air EasyStart on each unit. They reduce the in-rush current by stepping up gradually thus eliminating that surge.

Itís the same reason owners install them for air conditioning so they can run them on smaller generators.

Works for us but YMMV.
__________________
2019 27í Globetrotter FBT Walnut/Dublin Slate
2018 FC23FB
2019 Ram 2500 6.4 Hemi Laramie Blue Ox 1000#
WBCCI# 10258
RETIRED!
jeffmc306 is online now   Reply With Quote
Old 02-20-2024, 09:37 AM   #7
2 Rivet Member
 
2016 30' International
Redmond/Tucson , Oregon/Arizona
Join Date: Aug 2013
Posts: 90
Why aren't you using the gas furnace instead of testing the limits with 2 HP's and a space heater?
davetoregon is offline   Reply With Quote
Old 02-20-2024, 09:46 AM   #8
Rivet Master
 
2023 28' International
Mercer County , New Jersey
Join Date: Oct 2021
Posts: 735
Quote:
Originally Posted by davetoregon View Post
Why aren't you using the gas furnace instead of testing the limits with 2 HP's and a space heater?
I was going to make a similar comment in that if it is cold enough that you need all 3 heat sources, you are probably at the limits of the efficiency of the heat pumps and should switch to the furnace.
jeffb831 is offline   Reply With Quote
Old 02-20-2024, 09:50 AM   #9
4 Rivet Member
 
2019 27' Globetrotter
2023 30' Classic
Denver , North Carolina
Join Date: Jan 2018
Posts: 280
Images: 1
You should have no problem. Each Heat Pump is on a separate leg and each leg is able to provide up to 50 amps if you're plugged into a 50 amp pedestal. The heat pumps will draw around 15 amps when the compressor is running, a little more briefly during startup without soft starts.

I have done what you are describing and never had a circuit breaker trip.

Dave S
link2dks is offline   Reply With Quote
Old 02-20-2024, 02:21 PM   #10
2 Rivet Member
 
Trekers's Avatar
 
2022 30' Flying Cloud
OKEMOS , Michigan
Join Date: Feb 2022
Posts: 59
Quote:
Originally Posted by davetoregon View Post
Why aren't you using the gas furnace instead of testing the limits with 2 HP's and a space heater?
We use a small space heater and 1 or 2 of our heat pumps to avoid running the furnace. My electricity use is free (where I'm currently camping for a few months anyway), and propane costs money. Plus, electricity doesn't require me to refill tanks. And, our furnace is located just outside of our bedroom, so it's loud when it kicks on at night. We only use the furnace when we're getting below 40, which seems to be our HP's effective limit.

So, the OP has a valid question, and I've done what they are asking without any issues.

-Ari
Trekers is offline   Reply With Quote
Old 02-20-2024, 02:43 PM   #11
Rivet Master
 
Mikebrady62's Avatar

 
2019 27' International
Rogers , Arkansas
Join Date: Aug 2019
Posts: 759
My heat pump doesn't seem to help much below 40-45 degrees. If it is colder than that, I run the furnace. If it's warmer than that, our small space heater works very well taking the chill off in the morning and it's much quieter than the heat pump.
Either way, you should have enough electricity to run all 3.
Mikebrady62 is offline   Reply With Quote
Old 02-20-2024, 05:48 PM   #12
1 Rivet Member
 
2020 27' Flying Cloud
Norcross , Georgia
Join Date: Feb 2020
Posts: 5
Thank you all for your suggestions and replies. The short answer as to why Iím querying is that in temps around the mid to upper 30ís overnight itís too cold to just run the heat pumps, but just barely. If I could supplement them with a space heater Iíd be running on electric (which I have paid for by renting a campsite), rather than the propane which will run out after 3 nights. At $35 a pop it was worth it to run the question by you all.

Thanks again.
JavaJay123 is offline   Reply With Quote
Old 02-20-2024, 07:36 PM   #13
4 Rivet Member
 
PC Conner's Avatar
 
2018 27' Flying Cloud
INDIAN HARBOUR BEACH , Florida
Join Date: Jul 2018
Posts: 250
Right!
PC Conner is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
2020 Bambi - 50 amps to 30 amps? jobo Electrical - Systems, Generators, Batteries & Solar 6 05-26-2020 11:57 AM
30 amps vs 50 amps @ Rv parks ColoradoLady Electrical - Systems, Generators, Batteries & Solar 18 07-25-2015 07:59 AM
Going from 50 amps to 30 amps for a 23FB KWN306 Electrical - Systems, Generators, Batteries & Solar 1 01-28-2015 11:12 AM
Can you run both Air Conditioners with the Genset? Keyair Classic Motorhomes 4 08-26-2011 05:32 PM
15 Amps vs 30 Amps billida1 Electrical - Systems, Generators, Batteries & Solar 8 10-01-2010 08:37 AM


Featured Campgrounds

Reviews provided by

Disclaimer:

This website is not affiliated with or endorsed by the Airstream, Inc. or any of its affiliates. Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.



All times are GMT -6. The time now is 07:13 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.