FYI Have to be careful with electric loads

[Joe Hogan]

Even with a full solid 50 amp connection running 3 A/C is maximum load in our RV. Any other load like water heater, house battery charger, cooking , laundry requires shutting down one or two A/C units.
We have now scheduled use of appliances outside of peak sunshine hours.

 

[Neal]

Your coach should load shed automatically.

 

[Joe Hogan]

It should but have had the post breaker trip here in Bowie TX. Not sure if the energy management system was engaged. It is now.
It 101F today….

 

[Joe Hogan]

Thinking about rewiring the middle air conditioner to the Line 2. The load on line 1 is very unbalanced.
The rear a/c just doesn’t work nearly as hard as the front two.

 

[redbaron]

Thinking about rewiring the middle air conditioner to the Line 2. The load on line 1 is very unbalanced.
The rear a/c just doesn’t work nearly as hard as the front two.

That is a good idea. WIthout the use of an MicroAir Easy starter, each unit will take a surge of 20amps when starting. Thats a big hit if all come on at the same time.

My LADP is wired so that 1/3 are on line 1, 2 is on line 2 along with the washer/dishwasher/dryer. It is very balanced, and I run all 3 air along with doing laundry & dishes without ever having a concern.

I also leave Oasis AC1/2 on all the time, and with a good 50 amp circuit I never have a problem unless we are running stove top, microwave, and vacumming...then we are living life dangerously.

 

[MemoriesByTheMile]

Our rear AC units works the least of the 3 ACs.
Hence, like @redbaron, we have AC 1&3 wired to leg 1, AC2 on line 2, with microwave & refrigerator and kitchen outlets on line 2 with that one AC unit. Oasis … I don’t recall exactly but think it is split between the 2 legs.
Generally we are pretty balanced, unless I pull out the Electrolux canister vac for a deeper clean than the Dyson stick vac. We just don’t microwave at the same time as vacuuming with the big vac.

 

[newmarokie]

Guys,
Am I missing something? I am almost positive the refrigerator and microwave in my coach are on the sub-panel. I am the most out of balance when both ACs are running and the charger is working hard to recharge the batteries.

 

[AbdRahim]

Even with a full solid 50 amp connection running 3 A/C is maximum load in our RV. Any other load like water heater, house battery charger, cooking , laundry requires shutting down one or two A/C units.
We have now scheduled use of appliances outside of peak sunshine hours.

I was wondering how one would run three A/C’s plus other stuff on 50 amps. I guess I don’t need a Prevost.

 

[Scotttkd2]

I was also recently experiencing load difficulties on the new to me coach, but found the issue to be the pedestal breakers were 20 years old and basically shot. (An owned lot, not an overnight RV park slot). I replaced all of my breakers with new and made sure the wiring was clean and in good condition and like "magic" all of my load management issues went away. I can now run all three AC with AC clothes dryer or microwave and not a peep from my coach power management system. I realize that is not an option for an overnight stay while on the road. As mentioned previously the start up of the AC is where you are probably getting overloaded. Last time I looked Soft start makes a dogbone version of their otherwise "installed at each AC" device, might be worth a look for use while traveling.

 

[sheridany]

I was wondering how one would run three A/C’s plus other stuff on 50 amps. I guess I don’t need a Prevost.

Four A/C’s on a Prevost.

 

[newmarokie]

I watched the video about the new builder building on the Prevost chassis. The Volvo engine had SIX alternators. It could run three ACs going down the road.

 

[flyboy013]

It should but have had the post breaker trip here in Bowie TX. Not sure if the energy management system was engaged. It is now.
It 101F today….

I’ve found that some campgrounds have old breakers that trip before reaching 50A. I’m connected up to RV-C network which spits out the current for each leg every 1/2 second. When I have a pedestal breaker trip I usually look at the graph of the current and see what the draw was when it tripped. If it was less than 50A, I configure the load shedding (Silverleaf) so that it only allows 45A or even 40A. It all depends on what the current draw was when breaker tripped.

 

[redbaron]

I’ve found that some campgrounds have old breakers that trip before reaching 50A. I’m connected up to RV-C network which spits out the current for each leg every 1/2 second. When I have a pedestal breaker trip I usually look at the graph of the current and see what the draw was when it tripped. If it was less than 50A, I configure the load shedding (Silverleaf) so that it only allows 45A or even 40A. It all depends on what the current draw was when breaker tripped.

Mark - thats a smart idea about reconfiguring the load shedding--wish I had thought of it. I am going to adopt your practice from now on.

 

[AbdRahim]

Four A/C’s on a Prevost.

And still only 50A service.

 

[Joe Hogan]

As we experienced load issues I paid attention to the leg meters.
Combined we pulled up to 62 amps, the amount above the 50 amp pedestal power was drawn from the House battery I believe.
It will take some time to understand this system.

 

[sheridany]

What kind of numbers are you getting on the shore legs?

 

[MemoriesByTheMile]

62 amps of 120v?
If so, that is well below the 100 amps of 120v that you get on a “50 amp” RV circuit (which is 50 amps @ 240v)

 

[Joe Hogan]

Learn something new every day.

https://www.rvtravel.com/rv-electricity-power-principals-50-amp-shore-power/

 

[RTRanger]

Here is a tutorial on power distribution and usage: