Dometic fridge type RM2453

briche · Guru

Dometic fridge type RM2453

Tony Bev · Guru

According to site below, who sell fridge parts, between 175 and 195 watt, Brian

Hope that this info is helpful

https://www.caravansplus.com.au/3850644091-element-240v-175w195w-suit-dometic-rm2453-rm2553-rm2355-somerm2350-fridges-p-7024.html

erad · Guru

You obviously want to power the fridge from a 12 V source thence the inverter whilst travelling. The inverter will not draw less power than the 12 V element in the fridge - in fact it will draw more because of the inefficiencies associated with the inverter. Just ensure that the 12V power cable is big enough to minimise voltage drop and your 12 V system should do the job quite well.

PeterD · Guru

Brian, if your cable is too light to run your 12 V element in the fridge it will not drive the inverter. To run the 12 V element you need a cable capable of supplying 14. 6 A with a 1 V voltage drop along it (175 A / 12 V.) To run the inverter you have to factor in the inverters inefficiency. The rule of thumb is to divide the fridge power by 10 and not 12 to work out the required current to drive the inverter. You will then need a cable capable of supplying 19.5 A with a 1 V voltage drop.

Forget wasting your money on an inverter that will not make your fridge run any better and use some of it to purchase some heavier cable if the cable you already is too light.

If you don't have one, download its handbook.

Warren-Pat_01 · Guru

Hello Brian,
One added consideration is SAFETY! If something should happen while you are travelling, is there any risk of 240vAC being where it shouldn't be?

If you haven't already considered an isolator when you stop (eg for lunch) consider connecting a Fridge Switch (works on sensed motion). I run my fridge off my car's aux battery with the only problem my DC-DC charger on the car is capable only of 20A so if my car fridge is on at the same time, it stretches the friendship.

briche · Guru

Thank you one and all for your comments. After further investigation on the subject and considering your replys I have decided to abandon the original thoughts. I was aware of most of them anyway but it was good to put it out there to test the waters, so to speak.

i will go my original thoughts and leave it operating direct on 12 volts from the aux battery in the Crusier. I also have a no motion switch installed to overcome the flat battery issuewhen stopped.

once again, thank you for your response,it was much appreaciated.

briche

Brian.

-- Edited by briche on Wednesday 11th of October 2017 02:41:27 PM

-- Edited by briche on Wednesday 11th of October 2017 02:42:53 PM