LCD CURRENT DRAIN on INVERTER

Submitted: Friday, Jan 25, 2013 at 22:06
ThreadID: 100198 Views:4100 Replies:7 FollowUps:7
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I know there are 12 volt TVs out there, but just wondering if anyone has done a check on size of inverter needed for 54 cm Tv and a small DVD player?

Appreciate any help at all !

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Reply By: kevmac....(WA) - Friday, Jan 25, 2013 at 22:08

Friday, Jan 25, 2013 at 22:08
Not with it, sorry. LCD TVs of course
AnswerID: 503404

Reply By: Allan B (Member, SunCoast) - Friday, Jan 25, 2013 at 22:27

Friday, Jan 25, 2013 at 22:27
If you look in the instruction book under "Specifications" or on the data plate fixed to the TV there should be the power rating. It will be expressed in "Watts". An inverter to supply that should be a little larger, say 20% and should be of "Pure Sinewave" type.
Cheers
Allan

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AnswerID: 503406

Reply By: Ross M - Saturday, Jan 26, 2013 at 00:06

Saturday, Jan 26, 2013 at 00:06
Kevmac
Many 54cm TV go as low as 40W at 240, however some will be around 50W and possibly up to 60W depending on screen brightness and efficiency.
A DVD will be around 13W at 240v
Together the total may be up to 70W and as Allan said there is a loss in the 12v to 240 V AC conversion. This will take the load on the 12V battery to close to 100w at 12v, so at least 8 amps draw of current being used by the inverter to create the 240 supply you need.

Does your battery pack have the ability to supply 8 amps very hour you use it?
One nights viewing may be 1/3 to 1/2 of the charge capacity of a fully charged 100ah battery.
AnswerID: 503409

Reply By: Dennis Ellery - Saturday, Jan 26, 2013 at 00:34

Saturday, Jan 26, 2013 at 00:34
I have a 19 inch 12 volt TV.
It’s a Phoenix and is advertised as a ultra-low current draw because it has LED edge lighting.
The 19 inch (48 cm) is rated at 30 watt and 22 inch (56 cm) draws 40 watt.
If you intend connecting the TV off a Vast satellite decoder don’t buy a 240 volt model run off an inverter as the losses add up to about 20 watt. Buy the decoder with a 12volt inbuilt power board and it will draw 8 watt.
AnswerID: 503410

Reply By: Member Andys Adventures - Saturday, Jan 26, 2013 at 10:01

Saturday, Jan 26, 2013 at 10:01
Hi kevmac,
I run a 19" 12v TV and DVD player all in one. I have a 250w inverter that plugs into cig socket to run the Vast decoder box. I can run the tv all night for 5 nights before needing a recharge, using 2x 80 deep cycle batteries.
All TV's that are LCD LED are 12v and some come with a DVD player in them so you won't need an inverter.
Andy
AnswerID: 503419

Follow Up By: Dennis Ellery - Saturday, Jan 26, 2013 at 12:25

Saturday, Jan 26, 2013 at 12:25
Most LCD LED Tv’s sold in Australia are 240 volt and only a smaller amount are 12 volt.
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FollowupID: 780080

Follow Up By: Member Andys Adventures - Saturday, Jan 26, 2013 at 13:45

Saturday, Jan 26, 2013 at 13:45
Hi Dennis,
LCD and LED come with a 240v AC adaptor which is 12v. Every store I have been to looking at LED LCD Tv's have this.
What make are you looking at, I have 4 different brands of LED LCD tv's all bought from Harvey Norman they are all 240v but I run them on a 12v battery.
Andy
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FollowupID: 780091

Follow Up By: travellers - Saturday, Jan 26, 2013 at 13:58

Saturday, Jan 26, 2013 at 13:58
Have to agree with Andy. I cut the TV power lead close to the 12v adaptor and fitted a cig plug adaptor. An ordinary cigarette socket outlet fitted in the van powers the combined TV and DVD, no inverter required.

Pete
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FollowupID: 780093

Follow Up By: Dennis Ellery - Saturday, Jan 26, 2013 at 16:19

Saturday, Jan 26, 2013 at 16:19
Hi Andy,
Very interesting - next time I am near a TV store I will check for power packs.
My 43 inch Samsung LCD LED TV at home has no power pack - its 240 volt straight into the back of the TV.
My 19 inch LCD LED Phoenix is 12 volt and needs a power pack to run off 240 volt.
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FollowupID: 780109

Follow Up By: Dennis Ellery - Saturday, Jan 26, 2013 at 16:28

Saturday, Jan 26, 2013 at 16:28
By the way the PVR unit connected to my Samsung is 6 volt – run off a 240 volt power pack.
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FollowupID: 780110

Follow Up By: Member Andys Adventures - Saturday, Jan 26, 2013 at 19:27

Saturday, Jan 26, 2013 at 19:27
Hi Dennis,
Your 19" can be powered by a 12v battery, no need to plug into 240.
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FollowupID: 780133

Follow Up By: Dennis Ellery - Saturday, Jan 26, 2013 at 20:53

Saturday, Jan 26, 2013 at 20:53
Hi Andy - I realize that - thanks for the thought anyway
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FollowupID: 780136

Reply By: Member -Dodger - Saturday, Jan 26, 2013 at 18:01

Saturday, Jan 26, 2013 at 18:01
Our house LCD tv is 240v (80cm) to the tv and has no supply box but uses 80 watts when working .
The Caravan tv (15") has a transformer that converts 240v ac to 12v dc and also has a direct dc lead that plugs into the 12v van supply and uses 3amps when on tv mode and 4 amps when running on DVD mode. These figures are from an amp meter.

We find that the tv using dc current directly from the house batterys a better function.
I used to have a handle on life, but it broke.

Cheers Dodg.

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AnswerID: 503442

Reply By: The Bantam - Monday, Jan 28, 2013 at 16:41

Monday, Jan 28, 2013 at 16:41
Consider this.

Kogan are offering a small flat screen Tv WITH and inbuilt DVD player and PVR for $139.

That is less than the cost of a decent small inverter...and it runs direct off 12 volts.

day after day, the good reasons to run an inverter get less and less.

cheers
AnswerID: 503516

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