Engle MT60f -G4-S 12/240 fridge.

funandbubbles · Newbie

Engle MT60f -G4-S 12/240 fridge.

Cadpete · Guru

G'day Funand Bubbles and welcome to the forum.

According to the photo, at 12V it will draw 4.2A/hour, when ever the motor is running. What I cannot tell is for how long in the hour the motor would run, as that depends on many things - insulation, thermostat settings, even cable size can have some effect.

Assuming (very dangerous I know) it runs full time you would need 4.2A x 12 hours (for 1 day) = 100.8A/hr. Given that lead acid batteries should not be run more than roughly 50% down you are looking at 2 100A/hr batteries for each day if no recharging available. However you have a genny so you can look at the charge rate available and charger ratings from that to see how long you need to run it to charge your batteries.

Hope that helps

meggsy · Veteran Member

Cadpete wrote:
G'day Funand Bubbles and welcome to the forum.
According to the photo, at 12V it will draw 4.2A/hour, when ever the motor is running. What I cannot tell is for how long in the hour the motor would run, as that depends on many things - insulation, thermostat settings, even cable size can have some effect.
Assuming (very dangerous I know) it runs full time you would need 4.2A x 12 hours (for 1 day) = 100.8A/hr. Given that lead acid batteries should not be run more than roughly 50% down you are looking at 2 100A/hr batteries for each day if no recharging available. However you have a genny so you can look at the charge rate available and charger ratings from that to see how long you need to run it to charge your batteries.

Hope that helps

You don't say if you are using it from a van battery or a vehicle additional battery -- if in a van or camper you need to realise that a 100 Ah hr battery needs a 20 amp charger so logically you will need a 40 AH battery charger for 2 X 100 Ahr batteries - the DC output on the gene only provides something less than 10 Amps so you are better off using a quality multi stage charger from the AC outlet on the Generator..... usually vans have a reasonable quality charger built in to service the house (van) battery -- hope its not too confusing

Cheers by the way welcome to the forum

Vince · Senior Member

Hi funandbubbles

If I have read it right you are asking about power use on the Engel MT60f below is a link that I hope can give you the answer your are after.

www.roadtrucker.com/engel/engel-12-volt-fridge-freezer-technical.htm

http://www.campertrailers.org/solar_spreadsheet.htm

Cheers
Vince

-- Edited by Vince on Wednesday 14th of October 2015 10:26:07 PM

dorian · Guru

The fridge draws 4.2A at 12V, not 4.2 amps per hour.

Running this fridge for 12 hours will consume about 50 Amp-hours of battery capacity (= 12 x 4.2) , not 100.8A/hr.

03_Troopy · Guru

And battery chargers supply Amps, not Amp Hours

Cadpete · Guru

G'day Funand Bubbles and welcome to the forum.

According to the photo, at 12V it will draw 4.2A/hour, when ever the motor is running. What I cannot tell is for how long in the hour the motor would run, as that depends on many things - insulation, thermostat settings, even cable size can have some effect.

Assuming (very dangerous I know) it runs full time you would need 4.2A x 24 hours (for 1 day) = 100.8A/hr. Given that lead acid batteries should not be run more than roughly 50% down you are looking at 2 100A/hr batteries for each day if no recharging available. However you have a genny so you can look at the charge rate available and charger ratings from that to see how long you need to run it to charge your batteries.

Hope that helps

editted because there's 24 hours in a day!!

-- Edited by Cadpete on Thursday 15th of October 2015 11:24:26 AM

Vince · Senior Member

To also clarify the running

These fridges will run on a duty cycle of average 40% on REF to 1 on the dial -- Approx 9.6 Hours per day at 4.2 amps = 40.32 amps in 24 hours

If using as a freezer the duty cycle is close to 70% on Freeze. -- Approx 16.8 Hours per day at 4.2 amps = 70.56 amps in 24 hours

To combat the drain, a solar panel will assist in putting some charge in the battery and above I have posted a link with a spreadsheet that can help here. Cheaper than running a geni.

I feel that using 1 battery of say 100 ah is not suffice 2 would be a better option. However you noted about putting 1 in the camper and 1 in the tug.....
option here is Anderson plug to rear of truck and connect to Anderson plug on the camper that is connected to the camper battery.

At this point connecting either solar or generator 12v charge to the auxiliary battery in the tug with the plugs between both connected will charge both batteries.

Without getting too technical a dc-dc charger in line will also work more efficient.

Hope this may help
Cheers
Vince

03_Troopy · Guru

Vince wrote:
To also clarify the running

These fridges will run on a duty cycle of average 40% on REF to 1 on the dial -- Approx 9.6 Hours per day at 4.2 amps = 40.32 amps (Amp Hours) in 24 hours

If using as a freezer the duty cycle is close to 70% on Freeze. -- Approx 16.8 Hours per day at 4.2 amps = 70.56 amps (Amp Hours) in 24 hours

To combat the drain, a solar panel will assist in putting some charge in the battery and above I have posted a link with a spreadsheet that can help here. Cheaper than running a geni.

I feel that using 1 battery of say 100 ah is not suffice 2 would be a better option. However you noted about putting 1 in the camper and 1 in the tug.....
option here is Anderson plug to rear of truck and connect to Anderson plug on the camper that is connected to the camper battery.

At this point connecting either solar or generator 12v charge to the auxiliary battery in the tug with the plugs between both connected will charge both batteries.

Without getting too technical a dc-dc charger in line will also work more efficient.

Hope this may help
Cheers
Vince

03_Troopy · Guru

Cadpete wrote:
G'day Funand Bubbles and welcome to the forum.
According to the photo, at 12V it will draw 4.2A/hour (just amps, not amps per hour), when ever the motor is running. What I cannot tell is for how long in the hour the motor would run, as that depends on many things - insulation, thermostat settings, even cable size can have some effect.
Assuming (very dangerous I know) it runs full time you would need 4.2A x 24 hours (for 1 day) = 100.8A/hr. (Amp Hours, or AH , not A/hr) Given that lead acid batteries should not be run more than roughly 50% down you are looking at 2 100A/hr (Amp Hours, or AH , not A/hr) batteries for each day if no recharging available. However you have a genny so you can look at the charge rate available and charger ratings from that to see how long you need to run it to charge your batteries.

Hope that helps
editted because there's 24 hours in a day!!

-- Edited by Cadpete on Thursday 15th of October 2015 11:24:26 AM

funandbubbles · Newbie

Thank you everyone for your wonderful responses. We had a second battery installed in our car, and utilising the solar pannels all seems to be going well.

Regards

funandbubbles