Average vs Maximum LED Power: Sizing and Running Cost

Quick answer

LED displays list two power figures, and they do different jobs. Maximum power (for example 300 W/m²) is what the wall can draw showing full white at full brightness; use it to size circuits, cabling, breakers, UPS and generators. Average power (for example 100 W/m²) is what the wall typically draws with normal content; use it to estimate energy cost. The maximum is usually about three times the average. A 20 m² EA640H1 indoor wall therefore needs a supply for about 6 kW, but averages about 2 kW and uses roughly 8,760 kWh a year at 12 hours a day.

Sources used: EA600COB3 specs; EA640H1 specs; EA1000H9 specs; EA640F2 specs

Never size the supply on the average figure: a white slide or a bright scene can draw close to the maximum and trip breakers or overload a generator.

Documented average and maximum power by model

All four sourced models list AC 100–240 V, 50–60 Hz input. Those are input conditions, not a substitute for the W/m² figures. EagerLED’s EA600COB3 documentation explicitly labels its average figure for running-cost estimates, and the EA1000H9 documentation says to size the generator, distro and cabling on maximum figures rather than averages.

Sizing circuits and cabling from the maximum

Multiply the wall’s active area by the maximum W/m² for the exact model, pitch and indoor or outdoor version, then add the processor, media player and any other equipment on the same supply.

Currents assume a power factor of about 0.95. These are planning numbers for the electrician, who chooses the breakers, cable sizes and distribution for the site and the local electrical code. Split large walls across several circuits so one fault does not black out the whole screen, and keep inrush current in mind: switching on many power supplies at once draws a surge, so many installations power cabinets up in groups.

Generators and UPS

For outdoor events and temporary walls, EagerLED’s EA1000H9 documentation is explicit: size the generator, distro and cabling on the maximum figures. A 30 m² outdoor EA1000H9 wall at 720 W/m² needs a generator able to supply about 21.6 kW plus the rest of the video system, with headroom; many engineers add a margin above the maximum so the generator is not run at its limit. The LED screen rental price guide covers what else a hire quote includes.

A UPS for a control room or broadcast wall is sized the same way. It must carry the maximum load for the time needed to ride through a short outage or shut down safely. For 24/7 rooms, see control room LED video wall.

Estimating energy cost from the average

Energy per year = area × average W/m² × hours per day × days per year ÷ 1,000 (in kWh).

Multiply by your tariff to get the cost. Real consumption depends on content and brightness: dark content and dimmed screens use less, bright white content more. Outdoor screens dim at night, which cuts their average considerably. For a full ownership budget, see LED screen running cost, power, spares and shipping.

Surge protection, grounding and power quality

Outdoor screens need surge protection on the incoming supply and proper grounding of the structure and cabinets, because a lightning strike nearby or a fault on the grid can damage power supplies across the whole wall. Indoors, a stable supply matters most for walls that run all day: ask the electrician whether the building’s supply needs conditioning, and keep the screen on circuits separate from motors, lifts or kitchen equipment that cause voltage dips.

On temporary sites, check the generator’s voltage and frequency stability under load before connecting the screen, and switch the screen on after the generator has stabilised. Power the cabinets up in groups rather than all at once to limit the inrush current.

Heat load for air conditioning

Almost all the electrical power a screen draws becomes heat. For indoor walls, give the HVAC designer both figures: the average for the normal cooling load and the maximum for the worst case. A 2 kW average load is about 6,800 BTU/h; a 6 kW maximum about 20,500 BTU/h. In small rooms, such as control rooms or meeting rooms, that is significant.

Read each power table by model, pitch and environment

Power figures change with the exact product, pitch and version:

1. Confirm the model and exact configuration, including SMD, GOB or COB.
2. Confirm whether the row is for indoor or outdoor use: EA1000H9 indoor and outdoor figures differ.
3. Confirm the pitch group: EA600COB3 uses different figures at P0.62–P0.78, P0.93–P1.56 and P1.87.
4. Read the maximum for sizing and the average for energy.

EA640F2 shows why configuration matters: its SMD options run 100–110 / 300–330 W/m², while its COB options run 80–100 / 230–300 W/m². If a table shows only one figure, ask which one it is.

Does higher brightness mean higher power?

Usually, but LED type matters. Outdoor screens draw more because they run at 4,500–6,500 cd/m², but the EA960R4 P10 DIP reaches 8,000 cd/m² at only 330 W/m² maximum, against 630 W/m² for the P10 SMD version. Compare the figures for each exact version; see outdoor LED brightness: 4500 vs 5000 vs 6500 nits.

Scenarios and what to confirm

For stadium installations with large loads, see stadium LED display cost.

Frequently asked questions

Should I size an LED wall’s power on average or maximum consumption?

Size circuits, cabling, UPS and generators on the maximum. Use the average only for energy cost estimates.

How much power does an LED wall use?

Indoor walls average about 50–110 W/m² and outdoor walls about 170–240 W/m², with maximums about three times higher. A 20 m² indoor wall averages about 2 kW.

Why is maximum power so much higher than average?

Maximum is measured at full white and full brightness; real content is darker and screens are often dimmed, so they draw about a third of the maximum on average.

How big a generator does an outdoor LED screen need?

At least the maximum load of the wall plus the video system, with headroom. A 30 m² EA1000H9 outdoor wall at 720 W/m² needs about 21.6 kW before margin.

Does dimming an LED wall reduce its power use?

Yes. Power falls roughly with brightness and with darker content, which is why outdoor screens that dim at night and indoor screens running well below their rating use much less than the maximum.

How much heat does an LED wall produce?

Nearly all its power. A wall averaging 2 kW adds about 6,800 BTU/h to the room’s cooling load.

Send the wall size, model and site power details to request a quote with a sizing calculation.