Television power draw

Healeyjet

Explorer
We are building an RV to live in for a few months at a time. As such we are equipping it with a television. We will be running on dual 220 Amp alternators and solar panels to 870 AH battery bank. Is there any reason to be concerned about the draw on our battery bank of a television that draws 80W versus one that draws 20W? At most we would watch the TV for a half hour twice a week with the occasional movie on rainy days. It will be run through a 3000W inverter. I am not electrical savvy but even 80W doesn't sound like much but I don't want to mess this up, LOL.

Thanks in advance!
Ward
 

Maninga

Adventurer
I wouldn't be too worried about an 80w TV if you're only using it for a few hours. You've plenty of battery capacity, probably get more loss through the inverter running the TV.

We're going a different route for TV, using a projector system. Drop down screen attached to the roof, thinking 40', project mounted on roof also. 12v pocket/pico projectors have come a long way lately
 

Bbasso

Expedition goofball
80 watt tv sounds rather big or old...
My 26 inch LED Vizio draws 27watts.
Sure you have the right numbers?
 

Healeyjet

Explorer
It is a 2015 Samsung 32" HD Smart TV. The 28" is 22W, the 32" says it's 80W. Could the fact that it is a smart TV mean it has more things going on inside than a simple TV?
Ward
 

LeishaShannon

Adventurer
I'd probably look at a smaller inverter too, a 3000W inverter might waste between 20W and 50W just being turned on.

We went the same way as Maninga with a LG PF1500 projector - 1080p and LED bulb so no problems with vibrations or having to wait for it to cool down. ~55in screen inside and 110in outside on the side of the truck :)

It also runs off 19v DC , so no need for an inverter at all.
 

Healeyjet

Explorer
Thanks for the info. I asked the builder about parasitic draw and possibly using a large inverter to run the major items and a small inverter to run the phone chargers, lights, fans etc. It is a Samlex Evo 3012.

His reply

"This new series of high efficient inverters have a power save function where on standby they draw 0.6 amps. The inverter will stay in this mode until you turn something on, then it will only draw power in proportion to what it is putting out. You won't have to worry about extra draw draining your batteries with this unit, plus having two inverters highly complicates the wiring as well as takes the simplicity out of the equation. You have a tremendous reserve of battery power combined with approximately 40 amps of solar power available during the day, that your system will run self sufficient for indefinite periods of time when your dry camping."

Her is the info I found on the inverter

Input: 12 VDC
Output: 120 VAC
Watts: 3000 Watts
Surge: 9000 Watts
Outlets: Hard Wired
Fuse: External
Remote Control: EVO-RC (Optional Remote Control)
Safety ETL safety listed to stringent UL standards: 1741, 458, and to CSA C22.2 No. 107.1-01. EMI/EMC compliant with FCC Part 15(B), Class B and RoHS Compliant.
Nominal AC output, frequency, THD: 120 ± 5% vac, 50/60 hz ± 0.1 selectable, < 5% thd
Input battery voltage range: >9 - 17 Volts DC
Continuous power output at 25° C: 3000 VA
Continuous AC output current (A): 25 amps
Surge power for 1 ms 300% (9000va, 75a)
Surge power for 100 ms: 200% (6000va, 50a)
Power boost for 5 seconds: 150% (3900w)
Power boost for 30 seconds: 140% (3800w)
Power boost for 5 minutes: 120% (3400w)
Power boost for 30 minutes: 110% (3200w)
Maximum continuous DC input current: 373a
Inverter efficiency (peak): 90%
No load power consumption normal mode: 30w; power save mode: <8w
AC input from grid/generator: 120 Volts AC nominal (60 - 140 Volts AC, 40 - 70 hz selectable)
Programmable AC input current: 5-70A (default 30A)
Transfer relay type and capacity: DPDT, 70A
Transfer time: inverter to grid/generator: < 1 ms (synchronized transfer at zero crossing)
Transfer time: grid/generator to inverter: Up to 16 ms (synchronized transfer)
AC input voltage range: 120 Volts AC nominal (60 - 140 Volts AC, 40 - 70 hz selectable)
Maximum AC input current: 20 amps, AC
Maximum DC output current: 130 amps, DC
Power factor: > 0.95
Charger efficiency: 86%
Charging stages: adaptive charging control; normal mode: 3 stages – bulk, absorption, float; Equalization mode: 4 stages – bulk, absorption, equalization, float
Battery temperature compensation: Battery temperature sensor included. Compensation range from -20°C to + 60°C
Charging input voltage range 13-15 Volts DC
Maximum charging current 50A
Cooling: 2 fans – temperature controlled, variable speed
Protections/alarm: input over current, output overload, short circuit, over temperature, battery low voltage /over voltage, immunity against conducted electrical transients in vehicles
Compliance Safety/EMI/EMC: Intertek-ETL listed: conforms to ANSI / UL STD. 1741, 458; Certified to CAN / CSA STD. C22.2 no. 107.1-01; certified to FCC part 15(b), class b
Temperature: Operating: -20°c to +60°c (-4°f to 140°f); storage: -40°c to +70°c (-40°f to 158°f)
Operating humidity: 0 to 95% RH non condensing
Dimensions (W x D x H): 12.79" x 16.77" x 8.15" (325 x 426 x 207mm)
Weight: 64 lb. / 29 kg

Ward
 
Last edited:

Forum statistics

Threads
189,992
Messages
2,922,955
Members
233,266
Latest member
Clemtiger84
Top