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Equipment catalogNEPTUNE V
ITM Power

NEPTUNE V

Full scope 5 MW containerised green hydrogen plant

HydrogenPEM electrolyserModelled
NEPTUNE V by ITM Power
Nominal power
5MW
Specific energy
55.9kWh/kg
H2 output pressure
30bar

Characteristics

3 of 6 fields · all sourced · retrieved 2026-09-03
Nominal power
5MW
Specific energy
55.9kWh/kg
H2 output pressure
30bar

NEPTUNE V is ITM Power's full scope 5 MW containerised PEM hydrogen plant for mid-scale projects. The spec sheet declares 8 stacks for 5 MW of capacity, 90 kg/h of hydrogen at 30 bar(g), and an AC power consumption of 55.9 kWh/kg covering the full system (water purification, stack and balance of plant) at beginning of life. Output purity is given against EN 17124 and ISO 14687 as under 5 ppm H2O and under 5 ppm O2. The plant modulates at 10% per second ramp up and 50% per second ramp down over a 12.5 to 100% operating range, on an optimised footprint of about 96 m2, and is quoted at EUR 5,000,000 on ITM's standard terms.

Manufacturer datasheet (6)

Hydrogen production
90 kg/h
Number of stacks
8
Operating range
12.5-100%
Hydrogen purity standard
< 5 ppm H2O, < 5 ppm O2 (EN 17124, ISO 14687)
List price
EUR 5,000,000 on ITM standard terms
System footprint
Approx. 96 m2 optimised layout