Can you 'convert' Amp hrs/hour to an equivalent 240V use?

[Gàirnealair]

My campervan conversion has a Dometic CRE0065 fridge and my understanding of the setup is that it always draws power from the leisure battery, and when on hook-up the mains power is recharging the battery, not directly powering the fridge. However, ignoring that little detail , and over-simplifying massively, I am trying to answer the following question:-

If a van with a Dometic fridge, which has a Power consumption avg. 1.93 ahrs per hour in 24 hours, is plugged into EHU, how much is drawn from the grid to replace that which the fridge uses?

I have searched all over Google but I guess I am not phrasing my searches correctly to get an answer which seems feasible. I appreciate there are multiple variables dependent upon external temperature, fridge settings, etc. I am not looking for a scientifically accurate result, just enough information so that I can say to someone "this is how much LX I used when parked on your drive" so I can reimburse them.

 

[Deaky]

Massively over simplifying it but

That's 1.93a draw per hour at 12v is 23.16w per hour

23.16w x the number of hours you were on the drive will give you the watts of electricity you've used.

 

[Dellmassive]

You could look at it the other way....

That links shows 45w average power draw.

That will be very similar for 12v and 240v via the charger.

So calculate for 45W or 45Wh.

24hrs x 45wh = 1080wh per day.

1080wh X 7days = 7560Wh per week. (7.56KWh)

Then get the price of electric per KWh and charge accordingly.

Rough average £0.30 - £0.45 per KWh ATM.

So about 30-40p per day.

 

[Gàirnealair]

Thank you both.

Your replies are brilliant and exactly what I needed to know - very much appreciated.

 

[Deaky]

Thank you both.

Your replies are brilliant and exactly what I needed to know - very much appreciated.

Go with mine, its less

 

[Mocko1962]

Get some solar on your roof … my 150W panel just about runs the fridge when it’s producing so it’ll be free during sunny / daylight hours as Igenerally do a full weekend 2 days with no hookup and the combo of the leisure battery + the solar panel keeps me with enough volts in the battery to not worry about losing camping electrics ( fridge lights and even in winter starting and running the erbersprecher night heater )

 

[Gàirnealair]

@Mocko1962
Thank you for that. For reasons which are not relevant here I cannot put solar on my van roof.