Requirements

EU efficiency requirements for internal power supplies

The ecoPSU program follows EU regulation requirements that are defined in COMMISSION REGULATION (EU) No 617/2013 of 26 June 2013 of the European Commission. The regulation stipulates minimum requirements for internal power supplies in desktop-computers, integrated computers, servers and more that are placed on the European Single Market.

In ANNEX II 5, the regulation specifies values for the efficiency of internal power supplies. All internal power supplies must comply with the declared efficiency levels within the EU as of July 1st, 2014.

Minimum requirements for efficiency and PFC

In Desktop computers, integrated desktop computers, desktop thin client, workstation and small scale Server:

All computer internal power supplies shall not perform at less than:

a)    85% efficiency at 50% of rated output power,

b)   82% efficiency at 20% and 100% of rated output power,

c)    Power factor = 0.9 at 100% of rated output power.

In Computer Servers, internal power supplies have to fulfill the following requirements:

All multi-output (AC-DC) power supplies shall not perform at less than:

a)    85 % efficiency at 50 % of rated output;

b)   82 % efficiency at 20 % and 100 % of rated output;

c)    power factor 0,8 at 20 % of rated output;

d)   power factor 0,9 at 50 % of rated output;

e)    power factor 0,95 at 100 % of rated output.

All single output (AC-DC) power supplies with rated output of not more than 500 W shall not perform at less than:

a)    70 % efficiency at 10 % of rated output;

b)   82 % efficiency at 20 % of rated output;

c)    89 % efficiency at 50 % of rated output;

d)   85 % efficiency at 100 % of rated output;

e)    power factor 0,8 at 20 % of rated output;

f)   power factor 0,9 at 50 % of rated output;

g)    power factor 0,95 at 100 % of rated output.

All single output (AC-DC) power supplies with rated output greater than 500 Watt but not more than 1000 W shall not perform at less than:

a)    75 % efficiency at 10 % of rated output;

b)   85 % efficiency at 20 % and 100 % of rated output;

c)    89 % efficiency at 50 % of rated output;

d)    power factor 0,65 at 10 % of rated output;

e)   power factor 0,8 at 20 % of rated output;

f)    power factor 0,9 at 50 % of rated output;

g)   power factor 0,95 at 100 % of rated output.

All single output (AC-DC) power supplies with rated output of more than 1 000 W shall not perform at less than:

a)    80 % efficiency at 10 % of rated output;

b)   88 % efficiency at 20 % and 100 % of rated output;

c)    92 % efficiency at 50 % of rated output;

d)    power factor 0,8 at 10 % of rated output;

e)   power factor 0,9 at 20 % of rated output;

f)    power factor 0,9 at 50 % of rated output;

g)   power factor 0,95 at 100 % of rated Output.

The EU states a tolerance for these requirements in ANNEX III 2.3 of the regulation. The arithmetic average of efficiency measured at load conditions must not fall below the applicable limit value for average active efficiency by more than 2 %. The arithmetic average of the power factor must not fall below the applicable limit value for the power factor by more than 10 %.

Minimum requirements – Lowest power state / standby power

In addition to efficiency and PFC, ANNEX II 3.1/3.2/3.3 of regulation No. 617/2013 also states that desktop computers, integrated desktop computers and notebook computers shall not exceed 0,5 Watt power demand in lowest power state. This directly implies that an internal power supply also may not exceed this value. Otherwise an internal power supply cannot be sold as a part of such devices.

Therefore, the ecoPSU program also requires that an internal power supply may not exceed 0,5 Watt power demand in the lowest possible power state in a typical computer system. Since power consumption in this case not only depends on the PSU but also on the motherboard used, ecoPSU is currently in contact to major motherboard manufacturers to collect data on standby power consumption of motherboards and find a solution for proper standby validation and documentation for system builders.

Until detailed data from motherboard manufacturers is available ecoPSU will and test verify the low power system requirements recommended in the ATX 2.3 design guides that focus on ErP requirements.

The Recommended System DC and AC power consumption in ATX 2.3 Design Guide is defined for the system AC wall power consumption (100V~240V) as:

  • < 0.5W with a load of ≤0.225W on 5 V SB (to meet 2013 ErP Lot 6* requirement)
  • < 1W with a load of ≤0.45W on 5 V SB (to meet ErP Lot 6* requirement)
  • < 5W with a load ≤2.75W on 5 V SB (to meet 2014 ErP Lot 3* requirement)

(This settings are recommended in the ATX Design guide, but not required. But in order to comply with new EU regulations they become necessary)

Also PSU 5V SB efficiency should be

  • 45 – 50 % at 0,1 A (~ 0,5 W load at 5V SB)
  • 45 – 50% at 0,05 A ( ~ 0,25 W load at 5 V SB)

recommended efficiency to get below 1 or 0,5 Watt total input power for ErP compliance.