Power-to-Gas Efficiency Calculator

Calculate the round-trip efficiency of power-to-gas-to-power systems including electrolysis, compression, storage, and fuel cell conversion.

Inputs

Electrolyzer Efficiency (%)

Compressor Efficiency (%)

Storage Loss (%)

Fuel Cell Efficiency (%)

Tab to move between fields

Results

Round-Trip Efficiency

33.96%

Energy Lost66.04%

Electric → H₂ Efficiency63%

H₂ → Electric Efficiency53.9%

vs. Battery Storage (90%)37.73%

How to Use This Calculator

Enter Electrolyzer Efficiency (%), Compressor Efficiency (%), and Storage Loss (%).
Set Fuel Cell Efficiency (%).
Review the Round-Trip Efficiency (%) result.
Use Energy Lost (%) and Electric → H₂ Efficiency (%) to inform your decision.
Use the chart to visualize the results and explore different scenarios by adjusting inputs.

How the result changes with Electrolyzer Efficiency (%)

Electrolyzer Efficiency (%)	Round-Trip Efficiency
46%	22.31%
59%	28.62%
76%	36.87%
90%	43.66%

What each input means

Electrolyzer Efficiency (%): Electricity-to-hydrogen conversion efficiency. PEM: 60-80%.
Compressor Efficiency (%): Energy efficiency of hydrogen compression for storage.
Storage Loss (%): Hydrogen lost during storage from permeation and boil-off.
Fuel Cell Efficiency (%): Hydrogen-to-electricity conversion efficiency.

What each result means

vs. Battery Storage (90%): Round-trip efficiency as a percentage of battery storage (90% baseline).

How this is calculated

Worked example, using the default values

Identify Input Parameters
4 parameters
Electrolyzer Efficiency (%) = 70, Compressor Efficiency (%) = 90, Storage Loss (%) = 2, Fuel Cell Efficiency (%) = 55 = 4 input(s) provided
Calculate Round-Trip Efficiency
Round-Trip Efficiency
33.96 = 33.96
Calculate Energy Lost
Energy Lost
66.04 = 66.04
Calculate Electric → H₂ Efficiency
Electric → H₂ Efficiency
63 = 63

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