The compressor cool boxes are ok for a day or 2 if set on 3°c. Ours was set on -10c in a high ambient temperature so over night it hammered the battery.wonder how i will get on with my little compressor fridge box and no solar, unless you count the little attach to battery one from Halfords
Just realised I didn't make it clear that it would be 55ah out of EACH of your lead acid batteries, ie 110ah in total.Strong ... how long ... etc ...
Depends how long you are going to be off EHU, you'll get an absolute max of 55ah out of your lead acid batteries unless you want to knacker them (don't go below 50%) so a 100w solar panel may struggle to keep you self-sufficient for a few days, depending on what else you use and/or if you do any driving too to put charge back in them.
How depressing is that - that someone thinks that people need an app to do basic division.
Panels mounted flat on the roof in the UK will at maximum give less than 60% of rated output. 5A is about the best you can expect for a 100W panel.
It's a nice simple project for a beginning web site programmer. Then when you've got it working, you might as well add it into your web site rather than throw it away. Somebody might find it useful.How depressing is that - that someone thinks that people need an app to do basic division.
I think you are working your figures at the wrong voltage a 100 watt panel absolute maximum is 6 amps. Need to do calculations at 16.5/17v.Panels mounted flat on the roof in the UK will at maximum give less than 60% of rated output. 5A is about the best you can expect for a 100W panel.
A 100 watt panel is tested for output in standardised conditions, so that you can fairly compare different brands of panel. These conditions are about what you would get in tropical conditions with the panel at 90 degrees to the sunlight. Mounted flat on a roof in Europe you are never going to get 100 watts from a 100 watt panel.I think you are working your figures at the wrong voltage a 100 watt panel absolute maximum is 6 amps. Need to do calculations at 16.5/17v.
My flat mounted 100 watt panels achive 5.5 to 6 amps a couple of hours either side of midday around the 21st June fall off quite a bit once you get away from those times/dates & we live on the south coast.
2/ applies to both types of fridge. The problem with compressor fridges is that in this country, in average Summer weather, and more especially early or late in the year when lights and maybe TV are eating your battery, you will need twice the battery and solar capacity that you otherwise would. And even then you'll struggle.I like them for 3 main reasons. 1/ switch it on and forget, like your fridge at home very little goes wrong with them. 2/ when on ehu you use the elec paid for not your gas, and when wild camping free solar. 3/if you have a pvc van the fridge can be installed at eye level because it slopes at the back.
The down side is you need extra solar and batteries to accommodate it and not expect to go wildcamping in this country for more than a few days in one place in winter.
I have 300a/h of batteries and 220w solar and never fell below 12.6v off ehu in 2 months abroad in the summer.
My rule of thumb would be i would be happy wild camping with 200a/h batteries and 200w solar.
Im interested in this topic!! I've been speaking to photonic universe regarding this. I sadly have not yet had the time to get my head around electrics and the maths involved. BUT I put It to PU, their response was, a 230v AAA+ fridge ran through correct sized inverter... Is more efficient than 12v equivalent. I have them a few of options, that's what they came back with... Not sure if this is helpful of relevant, but just putting it out there....