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Message posted by Monty1529/5/2022 at 12:18pm
Outfit: Lunar Cosmos 524 Location: London
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Monty15
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You need to be more specific with the actual appliances and state their power requirements, as with some it's an absolute no, and with others a definite yes!
Your 'fridge box' can be one of three different types, an Absorption type fridge (typically the 3 way gas/240v/12v type), or a Peltier/Thermo Electric type 'coolbox', both of which are definitely no as far too high power consumption on 12v, or a compressor type fridge that can often work for days on a suitable sized battery.
If a modern LED TV, that doesn't draw much power and shouldn't be a problem for a few hours a day, if an old style 'big boxy' CRT type, that probably consumes too much power.
Lithium batteries can be worth the money if you are going to use it's potential/capacity, otherwise just a waste of money as complete overkill for a job well within scope of a ordinary lead leisure battery. As to straight swap, can be depending on scope of battery charger.
Would help if you'd told up of how you are using the equipment, Caravan/MH, tent etc.
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From adventures in Europe, to summertime retreats in the UK - there is no better way to experience all this than in your motorhome or campervan. Get a quote today by calling our team on 01865 818345 or visit our website
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| Motorhome Protect - Get a motorhome or campervan quote - call 01865 818345 |
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From adventures in Europe, to summertime retreats in the UK - there is no better way to experience all this than in your motorhome or campervan. Get a quote today by calling our team on 01865 818345 or visit our website
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| Motorhome Protect - Get a motorhome or campervan quote - call 01865 818345 |
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From adventures in Europe, to summertime retreats in the UK - there is no better way to experience all this than in your motorhome or campervan. Get a quote today by calling our team on 01865 818345 or visit our website
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Message posted by Ernie DB20/6/2022 at 8:32am
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Ernie DB
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Quote: Originally posted by SoggySteve on 18/6/2022
Quote:
So what's the best way to calculate the AH we need per day? Also on top of this could be charging phones.
The fridge claims to use 6amps at 12vdc which is quite high. Times that by 24hrs and you would discharge a 300ah AGM to half it's capacity (DOD-Depth of Discharge), which is kind of your limit, in one day. TV is 16 watts so divide 16 by your battery voltage of say 12.8 which is about 1.25amps which is 2.5ah for your two hour watch which is obviously virtually nothing.
Personally, if I had a fridge that uses 6amps per hour i'd get a new one. Our Webasto Cruise 65 is a 65ltr built in 12vdc fridge and uses around 1ah or less which is a sixth or less than yours and could run a 300ah battery down to 50% in around 6 days.
Even if you do what is almost essential in your situation and put solar on the roof, re-charging that 150ah of power a day in the Uk is a large ask even if you squashed 400watts of solar on the roof.
I always say to people to get the most efficient versions of things that you can as amp hours in batteries are precious and your fridge is just too much of a power junky in my opinion.
There are other fridges like ours but we've had ours for around 7 years now and it's just fantastic.
If you wish to calculate this stuff yourself and the unit you are powering doesn't have its AMP requirements written on it then look for the wattage and divide that number by the voltage which is most cases I do by using 12.8 volts (with a 12 volt system obviously!). As an example, your TV claims 16watts so 16 divided by 12.8 is 1.25 which is the amount of amps it uses which will be that for one hour, giving you it's Amp Hour rating. Your fridge however more helpfully claims 6amps at 12vdc so 6 x 24(hours in the day) is 144 which is 144 amps in one day. A basic 100ah lead acid battery will have its life cycles reduced from an already relatively average number if you drop it past 50ah so your fridge would use that battery's total recommended consumption in 8 hours (50 ÷ by 6ah is 8.3hrs)
Post last edited on 18/06/2022 11:00:31
Another faux pas, Steve???? 
Before denigrating someones kit and bigging up your own, at least learn the difference between rated input amps and Amp/hours. Or at least do some research.
https://www.waecofridges.co.uk/freezer/cf35.htm
The Waeco CF35 is compressor fridge with thermostatic control
Current Consumption
0.56 Amp/hour at +20°C ambient temperature,
0.71 Amp/hour at +32°C ambient temperature,
both at +5°C interior temperature
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Never argue with fools........They drag you down to their level, then beat you with experience.
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Topic: New battery time
via mobile 29/5/2022 at 10:49am
