Hydrogen is the most abundant element in the Universe. We use it as an odourless, colourless gas to store energy. Hydrogen is predicted to be widely used as part of decarbonisation in our journey to nett zero carbon by 2050. It can be thought of as a hydro-carbon fuel (like any other fuel) just without the carbon.

The gas we use is currently manufactured by BOC Ltd by steam reforming natural gas. The gas is compressed to 300 bar and contained in portable G20 cylinders, similar in size to a 13kg LPG cylinder. It is available from BOC Gas n Gear centres, and the first marinas are starting to stock it at the canal-side.

Used correctly hydrogen is as safe as any other fuel. It is a very bouyant gas, so any that is released will escape upwards and disperse. It can be explosive if released in a confined space. That is why all our equipment is roof mounted and designed for good ventilation.

Not yet. Most hydrogen in the UK is currently made from natural gas, which is a fossil fuel. However, there are a few companies who are making "green" hydrogen, made by electrolysis of water using renewable power. The UK Government is supporting the expansion of green hydrogen over the next few years as more renewable power becomes available. We are working with others on developing alternative sources of green hydrogen.

Currently hydrogen is about 8 x the price of petrol per kWh of power produced. However, that is not the whole story because generators are not a very efficient means of charging batteries. The battery charger will adjust the current drawn to "float" charge the batteries, reducing the generator load to a point where its efficiency is poor. Most people stop charging their batteries with a generator after a few hours. Over time this will shorten the life of the batteries. Ultimately the answer depends on how you value the convenience and other benefits of fuel cell derived power. There are plans for hydrogen to fall in price dramatically in the next few years, with predictions it will become cheaper than petrol and diesel per kWh by 2030. As early adopters we will create the demand that will hasten this happening. Hydrogen may not be cheap now, but it will be cheaper in the future.

Our current product is HyArk. It provides domestic power since that can be done now using portable G20 gas cylinders. We are developing a boat propulsion solution, initially for the hire fleet market. This will take us along the (tow) path to zero carbon emission boating.

Hydrogen fuel cells are near silent and can be set to operate automatically. They produce no pollution at point of use, and being mostly solid-state, they have few moving parts. Their efficiency does not vary much with load, and they have low internal losses, meaning they can be left on if needed without using much fuel.