Satelite

[Hussar]

Apolegies folks if this is in the wrong section.
I am going to install a sat system to my van, can anyone give me a ballpark figure on how long I can expect a 12v tv to last without EHU. Mrs H cannot do without her Eastenders, I understand that this is a "generic" question and to be honest I have not done a search (too much medicinal).
The system will be a bog standard cheap as possible freesat.

Any help is appreciated.
Paul

 

[Davesport]

It'll last for ages........................

Depends on how big your battery is

Satellite dish once locked onto signal wiil draw no current. Reciever.....probably about an amp-ish. My Avtex telly is a thirsty beast & draws 3.5 amps.

So the answer is totally dependant on how much oomph your battery has.

The alternative is to run a genny & hack the neighbours off

<ducks & runs for cover>

D.

 

[biggirafe]

It'll last for ages........................

Depends on how big your battery is

Satellite dish once locked onto signal wiil draw no current. Reciever.....probably about an amp-ish. My Avtex telly is a thirsty beast & draws 3.5 amps.

So the answer is totally dependant on how much oomph your battery has.

The alternative is to run a genny & hack the neighbours off

<ducks & runs for cover>

D.

Yep I would agree, its all depending on the specific equipment and battery you have,

I have a Sat system an Oyster. Once in position the dish draws no power its the 'freesat' box that draws power. I have a 12v one which draws about 10 watts max and 2 watts in standby. Less than 1 amp.

The Telly you use will also draw power and this can be significantly more depending on the brand. I use a laptop which draws about 3.5 amps

After some searching on the subject I believe the best calculation is:-
Capacity ÷ Current Drain × 0.7 = Approximate Battery Life

The 0.7 is for outside factors such as temperature and the fact your battery is unlikly to be in peak condition.

So for me (110/5)*0.7 = 15.4 hours if nothing else was in use which is unlikely

The big drain seems to be lighting, a single old style bulb is 8w so if I add that into the calc it would more than half the time
(110/13)*0.7 = 6 hours

Add in 2 light bulbs and the heating system and you are down to 3 hours or so before the battery is going flat.

I'm sure others will be along to chip in where I'm perhaps not 100% correct

 

[barryd]

Our method is a bit strange but we just had the gear anyway. I have a small 10 inch flip top laptop style DVD / TV combo which is really compact and uses hardly any power and seems to run indefinately. Yes the screen is small but its big enough for the back of the van. I also have a very lightweight 19" flat screen 240v TV which I use on hookup. A bit daft having two teles but there you go.