GeorgeTelford wrote:Hi Buford
My big question is why?
The answer is.....
These items that say they run off 12v actually want 12volts, a vehicle battery is actually NOT 12v unless its flat.
Measure a battery after charging and it will be 12.8 Volts thats 6.6% higher than a 12v item requires
When on trickle charge @13.8 Volts thats 15% Higher than required....
And when being Charged @ 15Volts thats a whole 25% Higher.
Many of these items that require 12v cannot take the extra voltage.
Another reason is cost, a 12Volt compressor Fridge costs Around £1000 a normal Mains voltage fridge costs £175, All other itams that are specifically made portable "12 Volt" (ie they are specifically made to accept voltage between 12-15 Volts) all the items that are specially made this way cost far more a cheap 14 inch TV for mains costs £40 make it 12v Portable and its a few hundred pounds.
Ease of replacement, mains stuff is far easier to find and replace, proper portable "12v" is not so easy to find
The Major point is that batteries are not really 12v they never were.....
48Rob wrote:
However, there is not a complete circuit because the negative battery terminal, and the negative power supply terminal are not connected.
Do I need to also connect the negative from #86 to the television, and if so, does it not cause problems having the power source (-) connected to the battery through the tv?
Rob
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