EFOY Pro 12000 Duo

EFOY Pro 12000 Duo providing a higher output.

100% reliable, off-grid energy

Power generator for high energy requirements

The EFOY Pro 12000 Duo, our 500 W fuel cell, offers 100% reliable, off-grid power as well as emergency power. When required, the fuel cell charges the battery fully automatically, then turns itself off again – without maintenance and without user intervention.

Its compact design allows installation in a 19 inch control cabinet. By the output up to 500 W, applications with higher power requirements can easily be operated with the EFOY Pro 12000 Duo. Typical areas of application are back-up power supplies for wind and telecommunications systems, off-grid power supplies for monitoring traffic and environmental sensors as well as on-board use in vehicles.

Technical data

Compare technical data

EFOY Pro12000 Duo
Power output500 W
Power output after (operating hours)1400 W (3,000 h)
Nominal voltage24 V DC / 48 V DC
Charging current20.83 A / 10.42 A
Charging current after (operating hours)16.67 A / 8.33 A (3,000 h)
Recommended battery capacity 224 V: 200 to 875 Ah
48 V: 100 bis 450 Ah
Weight32.0 kg (70.6 lbs)
Warranty 324 months / 3,000 operating hours
Connectable cartridgesM5, M10, MT60 / M28 only with M28 adapter
Number of connectable cartridges (with DCS1)2 (4)
Length fuel cartridge connector73 cm / 28.7 in
Switching threshold for automatic battery charging at 12 V / 24 V / 48 V 4On: -- V / 24.4 V / 48.8 V
Off: -- V / 28.4 V / 57.6 V
Required start-up voltage at 12 V / 24 V / 48 V-- / 20 V / 36 V
Maximum battery voltage at 12 / 24 V /
48 V
-- / 31 V / 62 V
Noise level (at 1m / 7m distance)62 dB(A) / 45 dB(A)
Nominal Consumption 50.9 l/kWh
Quiescent current draw at 12 V75 mA (at 24 V)
Operating temperature 6-20 °C to +50 °C / -4 °F to +122 °F
Start-up temperature+3 °C to +50 °C / +37.4 °F to +122 °F
Storing temperature+1 °C to +50 °C / +34 °F to +122 °F
Altitude 7up to 4,000 m / 13,123 ft
Dimensions D x W x H640 x 441 x 310 mm / 25.2 x 17.3 x 12.2 in (7HE)
International Protection (IP-Class)IP 20
Inclination along the roll axisPermanent: max. 10°; temporary (<10 min): max. 45°
Inclination along the lateral axisPermanent: max. 10°; temporary (<10 min): max. 45°
Communication protocolsMODBUS RTU; Clear text protocol (SIO commands)
User-InterfaceAt the unit with text display or via external operating panel OP2
Data-InterfaceRS232 RJ-45 plug
2x RS485 RJ-45 plug
I/O terminals (A, B, GND)
Electrical InterfacePower: +/- terminals: min. 10 mm²
Sense: +/- terminals: min. 2 mm²
Ground: Terminal: min. 2 mm²

1) Nominal power varies by ±10 %, decreases with the operation hours. Specification valid within warranty period.

2) Depends on battery type and application – bigger batteries possible, if additional energy source available (e.g. solar)

3) Regional warranty conditions for EFOY Pro fuel cells apply.

4) Factory Setting – can be modified with Interface Adapter and PC or operating panel OP2.

5) Effective consumption depends on operating conditions.

6) At temperatures above +40 °C / +102 °F the power output can decrease. Charging Lithium (LiFePO4) batteries is not always possible at temperatures below 0 °C. The instructions from the battery manufacturer must be observed.

7) During operation above the recommended altitude the power output can decrease.

EFOY energy solutions

EFOY Pro energy solutions combine power generation via EFOY Pro fuel cells and energy storage with batteries in a suitable housing. There is still sufficient space for customer-specific adaptations.

More about EFOY energy solutions


EFOY Pro 12000 Duo
EFOY Pro 12000 Duo manual
EFOY Pro 12000 Duo warranty conditions

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Can be controlled remotely

The EFOY Pro fuel cell can be monitored and controlled via a modem.

Discover more benefits

Questions and answers to
EFOY Pro 12000

What is the EFOY Pro fuel cell designed for?

The EFOY Pro fuel cell has been designed and developed for commercial and professional operation.

What is included in delivery?

You can see the scope of delivery here.

Installation kit

What do I have to consider when installing the EFOY Pro?

Make sure there is an adequate air supply and sufficient ventilation for waste heat and spent air. Please also ensure that there is enough space for the fuel cartridges and the unit itself. You can refer to the user manual for more details.

User Manual

How much does an EFOY Pro fuel cell cost?

Your EFOY Pro partner can tell you the current prices or contact us, we are happy to help!


Where can I buy an EFOY Pro fuel cell?

Please contact us directly. We will recommend you the suitable EFOY Pro Partner.

Service & Contact

We are happy to help you personally!

+49 89 673 592-555

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More EFOY Pro models

The EFOY Pro fuel cells are available in various performance categories, with outputs ranging from 45 W for small-scale power systems to a 500 W module for UPS solutions. With a Cluster Controller, multiple devices can also be connected to one battery system. This means that multiple kW outputs can be provided.

EFOY Pro 800 Duo

Power output
45 W

Nominal voltage
12 V DC / 24 V DC

88.3 kg


2 fuel connnectors


EFOY Pro 2400 Duo

Power output
110 W

Nominal voltage
12 V DC / 24 V DC

99.3 kg


2 fuel connnectors


EFOY Pro 12000 Duo

Power output
500 W

Nominal voltage
24 V DC / 48 V DC

32 kg


2 fuel connnectors



Power output
2500 W

Nominal voltage
48 V DC

27 kg