There are several options.

1. In any region of the Russian Federation and all over the world it is possible to purchase hydrogen from Linde Gas, which is a strategic partner of BMPower. Thanks to our cooperation, the use of unmanned aerial vehicles based on energy systems with BMPower hydrogen-air fuel cells is more convenient and safe.
You can contact LindeGas branches or representatives http://www.linde-gas.ru/ru/contacts/contact/index.html, http://www.linde-gas.ru/ru/contacts/distribution_centres/index.html

2. Use of a portable unit with a chemical source for refueling cylinders with hydrogen in the field. The unit consists of a high-pressure reactor into which a removable hydride cartridge and a container of water are inserted. The replaceable cartridge contains the necessary amount of hydride for refilling the high-pressure cylinder of a specified capacity.