Power usage

[HowTo]

Hi all
I need to power a TV power consumption 129Watt.

Mercer true sine wave UPS 1600watt. Using above TV how long will the UPS last after 2hr power outage.

 

[TheChamp]

Hi all
I need to power a TV power consumption 129Watt.

Mercer true sine wave UPS 1600watt. Using above TV how long will the UPS last after 2hr power outage.

The 1600W does not tell you anything in terms of the run time, it just tells you how much you can plug onto your UPS, the devil is in the detail of the battery used to power the UPS.

 

[Lupus]

The Mecer 2400va thread, all the info you need is there

 

[BadBoyGP]

a rough-and-ready calc*ultation:

129 Watts / 230 Volts = 0.56 Ampére

a fully charged 105 Ah battery (assuming it was 100% efficient, and your inverter had a power factor of 1 instead of the usual 0.6 or 0.8) would power the TV for:

105 Ah / 0.56 A = 187 hours

if you never wanted the battery to deplete below 50%, then halve that to 93 hours ~ 4 days

Incorrect calculation.

The 105ah is at 12v so you cannot divide by 0.56.

The real answer
105x12v= 1260wh
1260wh x 50% = 630wh usable.
630wh/129w = 4.9hours

 

[TheChamp]

Incorrect calculation.

The 105ah is at 12v so you cannot divide by 0.56.

The real answer
105x12v= 1260wh
1260wh x 50% = 630wh usable.
630wh/129w = 4.9hours

*Assuming it's at 12V.

 

[AlphaJohn]

*Assuming it's at 12V.

And 100% efficient.

 

[BadBoyGP]

Correct.

Your calculations above assumed 105ah at 230v

 

[HowTo]

Ok hold your horses.
UPS has 4*12V/9 Ah batteries. Should have stated this from the beginning. Series total 48V / 9Ah.
No 105ah batteries.

 

[TheChamp]

Ok hold your horses.
UPS has 4*12V/9 Ah batteries. Should have stated this from the beginning. Series total 48V / 9Ah.
No 105ah batteries.

I am afraid it's a lost cause, keep it for your router and other small things and get a proper inverter for your TV.

 

[Pineapple Smurf]

Hi all
I need to power a TV power consumption 129Watt.

Mercer true sine wave UPS 1600watt. Using above TV how long will the UPS last after 2hr power outage.

Have you paid your tv licence?




just joking, A UPS was never designed in the first place to keep things running for hours after a power failure.
The function of a UPS is to give you enough time to save your Word document, finish your solitaire game and then safely shut down Windows, and wait until you have ESKOM again.

What you need is an inverter, it is designed to keep you running for many hours.

Without going into the differences etc, as this topic has been hammered more often than @Cr4ig when he was in prison over the years, that I will just leave it here.

I am running the 55 inch tv and wifi etc on a Mecer 2400VA with 2x100 amp batteries, I suggest you look into something similar.

1200VA Mecer Inverter + 100AH Battery (4 HOUR BATTERY LIFE) KIT - 720W (150-200 cycles) - 12 Month Warranty

Mecer Inverter 1200VA (720W) + 20A Charger SIMILAR to INTELLIPOWER 2 or TESCOM 1000VA UNIT Includes 1x 100Ah Battery + Battery Case All cabling included 12-month warranty on the inverter PLEASE NOTE: The 4-hour battery life is based on a 150W consumption. Typically, a TV, lamp, wifi router, and...

www.geewiz.co.za

 

[wingnut771]

Hi all
I need to power a TV power consumption 129Watt.

Mercer true sine wave UPS 1600watt. Using above TV how long will the UPS last after 2hr power outage.

Use this calculator to work out battery size. Your consumption is 129W, divide this by 0.6 power factor = 216.67W.

Battery size calculator

The battery size calculator calculates the battery size in ampere-hour (Ah).

www.jcalc.net

EDIT: and your 48V:

 

[HowTo]

Have you paid your tv licence?

Yes every year