Battery life running fans for hot air heating

Interesting reading - am trying to find out how thirsty the TV is. Just done 3 nights in a field. So gas for the blown air heating and had TV on about 7 hours in total and then a further 3 - 4 on as a 'radio'. We have 100w solar panel and 2 x 110amp lesuire batteries but lost all power on waking this morning.  I think tv is thirsty, other half disagrees!   An thoughts? 

I believe some TVs take a lot of power (I have heard 2 - 3 Amps mentioned on this forum) but you should be able to find out. Does it have a power rating or do you have the instructions? If you post the make somebody may know.

Of course, if the heating is ticking over all day or night that wouldn’t help because the fan is usually on all the time whilst the heating furnace cuts in and out.

There are others with more practical knowledge of going off grid who may be able to help but I would mention that when a battery says 100 ampere hours unfortunately it doesn’t mean you can get 1 amp for 100 hours, or 2 amps for 50 hours etc. The capacity is under very specific conditions, when new, fully charged, and you dont want to go below about 25% capacity..

Thank you Hitchglitch - have done a bit of research on the Tv and will be more frugal in future (fine with me!) and ensure non LEDs are also not left on.