Question about Wagan Electronics - Others

# Will a wagen 10000 watt invertor with 6 6 volt 240amp hour batts run my 2004 motorhome entertainement center (2 TV plus sat. and 2 air cond. generally speaking. The air cond. pull 3000 watts at start then level at 1400 watts and the ent. center alot less. Please advise

Posted by on

• Level 3:

An expert who has achieved level 3 by getting 1000 points

All-Star:

An expert that got 10 achievements.

MVP:

An expert that got 5 achievements.

Vice President:

An expert whose answer got voted for 100 times.

• Master

Hi Pilot,

Yes, your inverter will power your air conditioner(s). But, take a look at the math below, and you will see that it won't be practical, bordering on futile.

This will be based on that your batteries are connected as 3 parallel pairs of series connected batteries. In other words, 3 12volt sources in parallel, with a total capacity of 585AH (Derated from 20AH rate to 5AH rate due to size of load per trojan literature). Your inverter is likely Wagan Model 2483, 12volt (actually 10-15volt input tolerance) input, with a 20,000 watt surge. Nominal voltages will be used as reference, actual voltages will vary from 10 (on low side for depleted battery bank) to 15 (battery bank fresh off charger) volts DC.

For a single air conditioner, it will demand 1400 watts to run, which at 120v translates to (1400/120) 11.7 Amps which is 117 Amps at 12volts (nominal). Since the inverter is 90% efficient, add another 10% for inverter loss (117 Amps + 10%) and you have a RUNNING current draw of 129 Amps. Startup current draw (though momentary for a couple of seconds) will be 3 times this amount, for a current draw of 387 Amps @ 12volts DC. For a single air conditioner. You will be trying to run 2 of them at the same time, unless you have an energy management system installed that cycles the air conditioner units back and forth, but not at same time. For 2 Units (simultaneous), your current draw from the batteries will be (Running) 258 Amps. Startup current draw will be a whopping 519 Amps. You are looking at some serious battery cables here. 4/0 Guage cable is only rated for 300 Amps, the connections themselves will be critical due to voltage drop at each connection. Plan on upgrading the wiring to DUAL runs of 4/0 welding cable to accommodate the enormous startup loads.

Since you specified 6v 240AH batteries, you probably have Trojan T-125 batteries installed. These have a capacity stated for 132 minutes at a 75 amp load. Multiply that times 3, and you have 132 minutes at a 225 amp load. Based on this published capacity, you will be able to run a both air conditioners for about *2* hours before the battery bank is depleted, assuming that the batteries are in perfect condition.

The televisions and satellite TVs are not going to be a factor here, since their power consumption is going to be trivial compared to that of the air conditioner(s). Yes, they will (slightly) decrease the amount of time that you have to operate with, but the air conditioners will be the biggest factors.

As you can see, your inverter and batteries will power what you want, but not for very long. If 2 hours is acceptable, then upgrade the battery interconnect cables (dual 4/0) and inverter power cables (again, dual 4/0), and it will work. This is considered to be extreme duty as far as the batteries are concerned. They likely will not last very long since they are being drawn down to 20% of capacity. You would be much better off using your generator to power everything. Also, the inverter that you are using is a modified sine waveform type of inverter. The air conditioners *will* run off of it, but they will be noisier, and current draw will increase a bit above what is stamped on the name plate. I am not able to account for the additional current draw as it depends heavily on the exact type of waveform (mod. sine straight, or mod. sine stepped). Also note that current demands from the batteries will start at their lowest level at 15vdc, and steadily increase until the battery bank hits 10vdc. In other words, the current calculations will start at 25% lower (battery bank fully charged), and increase to 20% higher (battery bank near being depleted). Running this high of a load on such a small battery bank will result in premature failure of the batteries.

Again, yes, your system (if wired properly) will run everything for about 2 hours. But, you are facing frequent battery replacement (all 6) if you do so.

Posted on Jul 08, 2010

• Sheldon Dedek Jul 08, 2010

A comment was cut off, not sure why.

The air conditioner current draw will drop when outside temperatures are cooler, but will rise when the outside temperatures are warmer. The Air Conditioning units have a design rating of 95F for temperature. In an environment where ambient temperatures exceed 100F, your current draw will be a lot more.

×

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
goodluck!

Posted on Jan 02, 2017

×

my-video-file.mp4

×

## Related Questions:

### 1994 jaguar has weak inj flash ,car idles,hard to start,dies on acceleration,revs with starting fluid,6 volts at inj when running ,12 volts key on! please help,replace ecm with used one!

i would double check all the grounds mice can reak havock on wires & jags need good grounds to run right kinda like a ford. try running an extra ground wire from batt to engine.

May 17, 2012 | Cars & Trucks

### Onan 5500 marqui gen set stumbles on demand

Steve,

The microwave alone shouldn't cause a problem for the generator as even the most powerful models run about 1200 watts or about 10 amps. An air conditioner on the other hand, can draw considerably more power to run depending on BTU size; 15 amps and up is not uncommon (and even twice as much as that though only briefly when starting).

If these were the only things connected and on, the generator should be able to handle them - again depending on the BTU size of the AC unit. Generators state their capacity in Watts, but must of the devices we connect are in Amps. Calculating Watts in an AC circuit is complicated, but pretty close to the much easier Watts in a DC circuit for most residential settings. Here's how it's done:

Watts = volts x amps. Pretty simple stuff. Your generator is rated at 5500 watts. The microwave is say, 120 volts / 10 amps - which equals 1200 watts. The generator has 4300 capacity available now. Suppose your air conditioner is rated at 120 volts / 15 amps - which equals 1800 watts. 4300watts - 1800watts = 2400watts capacity is left. But, the starting current for the AC is as much as 25 amps for a few seconds (and once started drops back to 15 amps) - which means there's only 1200 watts capacity left. Add up the rest of the appliances you're running at the same time (TV set, Cable / Satellite box, stereo, toaster, lights, computer, etc.- you get the idea), and you can see how you might have exceeded the 5500 watts capacity of the generator for a few seconds. It's at these times that your hear / see the generator speed falter and sputter, lights dim, etc.. If this is happening a lot, you may need a larger or additional generator.

I hope this helps and good luck!

Dec 25, 2011 | Watts Onan Portable Generator - 5000 ,...

### How many kilowatts per hour does the Krystal Clear Model 635T filter pump use?

The simple answer is not many. I don't think your pump is that hungry to use kilowattS per hour... lets see "Kilo" is one thousand. At this site you will find the several formula for getting to your answer. Ohm's Law applies ... http://www.powerstream.com/Amps-Watts.htm

I am presuming your pump is 115 Volts and it probably plugs into a 15 amp circuit. IF IT USES 15 amps (I doubt it uses the entire value) Volts X Amps = Watts or 1725 watts or about 1.7 kilowatt. I couldn't find the amp rating for your particular model pump. I think it probably operates near 6 to 8 amps @ 115 Volts AC. If your pump runs at 6 amps that is 690 watts, 8 is 920 and 10 would be 1150. There are other factors that determine the actual amount of power consumed - load will increase the use - partially clogged filter would be an example of increased load, age of the pump could be another factor.

Here is another nifty place to convert: http://www.supercircuits.com/resources/tools/Volts-Watts-Amps-Converter

Here is a rule of thumb: If a device can run on two different voltages, the higher the voltage, the lower the amps. For example 115 volt @ 12 amps would use 1380 watts. The same device running at 230 volts would run at 6 amps and use 1380. This is the correct math answer. However, in actual use, the device would run slightly more efficient (use fewer watts). Electricians and science teachers and math teachers will all tell you different stories depending on their discipline. Heavy use devices do run more efficiently at the higher voltage (stove, dryer, furnace, hot water heater, well water pumps, swimming pool pumps)(Do not go looking for a 220 Volt pump for your above ground pool in an effort to save money. The higher voltage device will cost more and there are other practical and safety related issues in this kind of installation.)

If you lived in my area, (please don't say where you live) you would pay about 12 cents (US dollars) per kilowatt hour. If your pump runs at 10 amps 115 volts - that would be just over 12 cents per hour to run the pump.

Mar 05, 2011 | Intex Krystal Clear Model 635 Pool Filter...

### 230V FEDDERS I HAVE 110V AND 20AMPS COMBINE HOW MANY AMPS DOES 230V NEEDS

I give simple formula to determine amps:

I (amps or current) =watts/volts.
And with above formula,you can calculate volts and watts too.

Jan 05, 2011 | Friedrich X-Star XQ10L10 20" Air...

### It doesen't put out 120 volts continueslly. It'll

you can search in the local repair section of fixya for a repair shop,for you problem,are you sure your batteries are still in good working condition i.e reading 12volts when battery is low

Feb 25, 2010 | Schumacher 1000 Watt Inverter with 2 GA....

### My aims 2000 pure sine wave inverter is pluged to 2 240amp/h 6 volt batteries. When | plug in a 1800 watt hairdrier i get an alarm as if the batt. were to low. they are new and at full charge. is the load...

Your inverter has a peak of 3000 watts rating and should power that hair dryer. Make sure your batteries are in good shape. The inverter can only put out what it takes in. 1800 watt demand on the inverter requires 1800 watts from the batteries.

Jul 14, 2009 | Inverter Aims Pure Sine Wave Power...

### Can you tell me what seer this unit is?

Divide the cooling capacity by the total watts. example 10,000 btu's divided by total watts ( voltage times current)

10000/(120 volts X 7.0 amps)
10000/840=11.9 eer

May 15, 2009 | Heating & Cooling

### Engine Start Then Batt/AIrbag Light On 14.6 Volts At Battery?

Batt/air bag light? 2 problems. air bag light check and clean wiring under passenger seat. Then drivers seat. Battery light I have no idea unless battery volts to low.

Feb 12, 2009 | 2004 Pontiac Montana

## Open Questions:

#### Related Topics:

50 people viewed this question

Level 3 Expert

Level 3 Expert