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Keep in mind the inrush current will far exceed this spec for a very short period of time as the compressor motor starts up. This can trip DC breakers if you use them. I've got a couple of (admittedly far too long) videos where I talk about this issue with an Engel MR040 and a Yeti 400:
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To calculate total amp hours you need to run entire Caravan. Let's calculate for each of the facility used respectively.
Device/Appliance Minimum Wattage
Alarm Clock 2
Coffee maker 300
Electric Kettle 1000
Hair dryer 1000
Iron 1000
Laptop Computer 20
Mobile Phone Charger 2
Electric Fan 10
Electric Heater 1500
Microwave 600
Radio 70
Television 70
Toaster 800
Water Pressure Pump 120
Satellite Dish 20
LED light 8
Power in watts is equal to Current in amperes multiply by Voltage in volts
Power = Current x Voltage Thus; P = I x V or I = P divided by V or V = P divided by I
Where:
P = power in watts (W) P = power in milliwatts (mW)
V = voltage in volts (V) V = voltage in volts (V)
I = current in amps (A) I = current in milliamps (mA)
A milliwatt is a 1000th of 1 watt , A milliamp is a 1000th of 1 amp
I = P divided by V I = 80 divided by 18 = 4.44 amps. So as the formula states that a 100 watt solar panel in peak light conditions will supply a current of 4.44 amps an hour.
If we say that a 100 watt solar panel will supply 4.44 amps for a period of 5 hours (in the summer). Since you require 770 W for 24 hr. It is not possible to run caravan on solar power for 24 hrs. Though it can lay a helping hand for 5 hrs.
I am not a guru buy still I tried to answer your question bcoz 6 months ago I used solar panel on my caravan.
The point with usage calculation that it depends upon the use of electronic equipment.
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