How to run 2 ac units on one genset

RLS7201 wrote:

dougrainer wrote:

RLS7201 wrote:
You can run 13.5 & 11,000BTU ACs on 30 amp shore power. Fleetwood has been do it since 1996. Load shedding was used by Fleetwood but you can do your own energy management by making sure the refrigerator and water heater are on propane. You will need to shut down one AC when using a microwave or other such high amperage item. At sea level, a 4K generator should provide enough energy for both ACs. Do the math.

Richard

This statement is not really true. Fleetwood had RVP(Coleman) build a lo amp draw AC unit(both 13.5 and 11) that with both could run on 30 amp service. Those units had a hard time cooling as well as higher amp draw 13.5 and 11k units. So, to state that all 13.5 and 11 can run on 30 amp service is wrong. You must have those specific RVP units to do that. Those lo amp units are not real common now since so many RV's are 50 amp service. Doug

What ever you say Doug. Just remind those that have added a second, non-RVP AC to their 30 amp rigs that it won't work.

Richard

You are confusing WORKING with the total amp draw. EACH AC (13.5 or 11) requires a minimum of a 20 amp breaker for each AC. Current 13.5 and 11 will draw about 26 amps total give or take 1 to 2 amps. So, you would state that yes, you can run those 2 units on 30 amp. The problem is, what about your other 120 appliances that you cannot easily turn off? Your Power Converter, your refer (2.7 amps), and other 120 appliances you do not think of. The OLD RVP units pulled a total of about 22 amps(13.5 and the 11) on Fleetwoods. Just because you "can", run 2 AC's does not make it safe or the best thing to do. Doug

Hi Richard,

Have you monitored the voltage when doing this? I'm quite curious.

RLS7201 wrote:
those that have added a second, non-RVP AC to their 30 amp rigs .Richard

dougrainer wrote:

RLS7201 wrote:
You can run 13.5 & 11,000BTU ACs on 30 amp shore power. Fleetwood has been do it since 1996. Load shedding was used by Fleetwood but you can do your own energy management by making sure the refrigerator and water heater are on propane. You will need to shut down one AC when using a microwave or other such high amperage item. At sea level, a 4K generator should provide enough energy for both ACs. Do the math.

Richard

This statement is not really true. Fleetwood had RVP(Coleman) build a lo amp draw AC unit(both 13.5 and 11) that with both could run on 30 amp service. Those units had a hard time cooling as well as higher amp draw 13.5 and 11k units. So, to state that all 13.5 and 11 can run on 30 amp service is wrong. You must have those specific RVP units to do that. Those lo amp units are not real common now since so many RV's are 50 amp service. Doug

What ever you say Doug. Just remind those that have added a second, non-RVP AC to their 30 amp rigs that it won't work.

Richard

I have two 15,000 A/C's and a Onan 5500.. Right now they are working, AS I TYPE together.

Pulse Air works as Doug described and I've been pleased using it on shore power. You could check RV salvage companies to see if they have one.With the Energy Management systems on newer RVs the demand for them dropped considerably.

RLS7201 wrote:
You can run 13.5 & 11,000BTU ACs on 30 amp shore power. Fleetwood has been do it since 1996. Load shedding was used by Fleetwood but you can do your own energy management by making sure the refrigerator and water heater are on propane. You will need to shut down one AC when using a microwave or other such high amperage item. At sea level, a 4K generator should provide enough energy for both ACs. Do the math.

Richard

This statement is not really true. Fleetwood had RVP(Coleman) build a lo amp draw AC unit(both 13.5 and 11) that with both could run on 30 amp service. Those units had a hard time cooling as well as higher amp draw 13.5 and 11k units. So, to state that all 13.5 and 11 can run on 30 amp service is wrong. You must have those specific RVP units to do that. Those lo amp units are not real common now since so many RV's are 50 amp service. Doug

Hi,

Add a micro-air easy start. Run the fans on low to reduce the current. Add a hybrid inverter/charger.

Upgrade to the Yamaha 4500 inverter/generator.

You can run 13.5 & 11,000BTU ACs on 30 amp shore power. Fleetwood has been do it since 1996. Load shedding was used by Fleetwood but you can do your own energy management by making sure the refrigerator and water heater are on propane. You will need to shut down one AC when using a microwave or other such high amperage item. At sea level, a 4K generator should provide enough energy for both ACs. Do the math.

Richard

MountainAir05 wrote:
HOW large is the present Gen set. If 3000/3500 then you can try , start the first one and let it settle down then start the second one with the thermostat set at a lower or higher setting. Nothing else can be on AC with both running. We ran several years that way, only issue, no other AC appliance could be turn on.

Pretty much what I do to get by with a 3KW generator and 2 13.5k BTU roof A/C's. No microwave, electric water heater, hair dryers or coffee pots.

KeninAZ wrote:
We have an older RV It only has the one AC unit and when it gets into the nearly 100 degree area it's only tolerable buy shutting off the rear bedroom door.

I think you should "service" the present A/C unit first, to be sure it is cooling like it should and the air is flowing properly.

If the gen currently has any extra capacity, replacing the existing A/C unit with a larger one might be more cost effective. Might.