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Compare the costs

Watermeln versus other solutions

Choosing sustainable energy on-site is about more than just emission-free operations; it’s about reliability and cost-efficiency. Watermeln distinguishes itself through an integrated approach that significantly reduces the Total Cost of Ownership (TCO).

1. Watermeln Hydrogen Generator (WM-200)

The WM-200 combines power, storage, and intelligent energy management into a single system. No external battery or additional generator is required, simplifying transport, installation, and maintenance.

Hydrogen costs are transparent—you only pay for what you consume. Thanks to high efficiency and minimal downtime, operational costs are structurally lower compared to battery swapping or third-party H2 systems.

Scroll down for the annual calculation and scenario data.

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Conventional hybrid solution

A hybrid system requires more components, more maintenance, and more complex logistics. Fuel costs remain high due to the continued use of diesel, resulting in ongoing CO₂ emissions and noise pollution. Furthermore, the batteries must be frequently recharged by the generator, which significantly limits overall efficiency.

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Battery swapping

At first glance, swapping battery packs seems straightforward, but it involves significant logistical and labor costs. Batteries must be constantly transported, charged, and replaced—which quickly becomes expensive and cumbersome for long-term projects or remote locations.

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Hydrogen generators from third parties

Many hydrogen systems on the market require an external battery to handle peak loads. This results in additional space requirements, transportation, connection costs, and higher initial investments. Furthermore, energy efficiency is typically lower than that of the integrated Watermeln solution, leading to a higher cost per kilowatt-hour.

Conclusion

Watermeln’s integrated approach makes all the difference: one compact unit, minimal logistics, zero emissions, and lower operational costs. This allows you to save not only on fuel and maintenance but also on time, transport, and complexity—resulting in maximum reliability.

See the price per kWh for each solution below.

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Watermeln H2-generator

  • € 1,63* Price per kWh
  • € 3.400 + € 1.250 Rent
  • € 3.500 Fuel
  • 5.000 kWh
  • Total
  • € 8.150 Projectkosten
  • 0 ton CO2 Emission
  • 0 kg NOx emission
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Hybrid diesel-generator

  • € 1,88 Price per kWh
  • € 2.100 + € 5.200 Rent
  • € 3.200 Fuel
  • kWh
  • Total
  • € 10.500 Projectkosten
  • 4 ton CO2 Emission
  • 7 kg NOx emission

You save € and 4 ton of CO2 + 7 kg NOx with the Watermeln generator

Disclaimer: These figures are based on market averages, Stage V emission standards, and a usage profile of 1,000 kWh per day (5 days/week, 24/7 demand) at rates of €11/kg for hydrogen, €1.80/L for HVO, and €0.50/kWh for charging, including asset rentals but excluding VAT and logistics; no rights can be derived from this calculation.
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Watermeln H2-generator

  • € 1,63* Price per kWh
  • € 3.400 + € 1.250 Rent
  • € 3.500 Fuel
  • 5.000 kWh
  • Total
  • € 8.150 Projectkosten
  • 0 ton CO2 Emission
  • 0 kg NOx emission
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Battery swap

  • € 2,10* Price per kWh
  • € 4.000 + € 4.000 Rent
  • € 2.500 Fuel
  • 5.000 kWh
  • Total
  • € 10.500 Projectkosten
  • 0 ton CO2 Emission
  • 0 kg NOx emission

You save € 2.350 and 0 ton of CO2 + 0 kg NOx with the Watermeln generator

Disclaimer: These figures are based on market averages, Stage V emission standards, and a usage profile of 1,000 kWh per day (5 days/week, 24/7 demand) at rates of €11/kg for hydrogen, €1.80/L for HVO, and €0.50/kWh for charging, including asset rentals but excluding VAT and logistics; no rights can be derived from this calculation.
h2 aggregaat.png

Watermeln H2-generator

  • € 1,63* Price per kWh
  • € 3.400 + € 1.250 Rent
  • € 3.500 Fuel
  • 5.000 kWh
  • Total
  • € 8.150 Projectkosten
  • 0 ton CO2 Emission
  • 0 kg NOx emission
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H2 + external battery

  • € 2,30* Price per kWh
  • € 4.000 + € 2.750 + € 1.250 Rent
  • € 3.500 Fuel
  • 5.000 kWh
  • Total
  • € 11.500 Projectkosten
  • 0 ton CO2 Emission
  • 0 kg NOx emission

You save € 3.350 and 0 ton of CO2 + 0 kg NOx with the Watermeln generator

Disclaimer: These figures are based on market averages, Stage V emission standards, and a usage profile of 1,000 kWh per day (5 days/week, 24/7 demand) at rates of €11/kg for hydrogen, €1.80/L for HVO, and €0.50/kWh for charging, including asset rentals but excluding VAT and logistics; no rights can be derived from this calculation.
WM-200

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