12volt TV and Waeco

Thanks Bantam. The freezer is one of those Waecos. I was told by auto electrician they use very little power and that's why they are ideal,for campers??? Thanks johno

Don't believe everything you are told.

Waeco make a wide variety of fridge products ranging from very small to full sized fridge freezers.

and remember 100watts is very little power when compared to most houshold appliances.

The fact is our mobile, battery powered systems have very restricted capacities and all to often people do not grasp this.

to avoid disapointment you need to account for every bit of current comming and going and optomism does not pay.

Y typical 30 to 40 litre fridge run as a fridge does indeed draw a small AVERAGE current spread over time.....but run that same machine run as a freezer at "recommended safe temperature" will draw 4 to 6 times ( or more) than it would run as a fridge under the same conditions......the motor will run more or less continuoulsy especially if it is freezing stuff down.

there are some articles on this site that may be helpfull or look for books by "Colin Rivers"....."solar that works" is one title that comes to mind.
have a trawl thru the back threads concerning fridges and battery systems.....these and similar issues come up very regularly.

remember 3 things

Solar pannels only output their rated capacity in the strongest sunlight and only for a few hours a day.

Never believe the average current consumption figures published by the fridge manufacturers.....those figures are very optomistic and in real use they draw far more.

It does not pay to be optomistic about current demand, battery capacity or solar output.

cheers

I have a vehicle laid up in the backyard - to keep the batteries topped up I set my 120w panels up on the roof and it has a Watts meter on it. At the moment (early spring) and clear days the panel only produces 5 ah between 11 and 2 each day and either side of those times much less. It is charging into a 100ah battery with a short cable run and a Mppt regulator.

I connected my small 25l evaKool RV fridge on freeze (very inefficient fridge) for a week and in sunlight the panel managed to keep the battery up but on overcast days the panels could not keep up and the battery drained down a bit but still OK as long as the next day was full sunlight. I think if there had been two consecutive overcast days (the panels produce about 1ah) the battery would have been discharged.

I think the OP setup is marginal and will sustain the system only if there is full sun.