H-300 PEM Fuel Cell - 300WFuel Cell Stack 300W Additional Information Horizon does encourage filling out a quote request form here in order to ensure that any needed supplemental parts can be included with your order. While we do try to keep air cooled fuel cell stack up to 5kW in stock, we recommend filling out the quote request form so that we can set proper delivery expectations. Fuel Cell and Hydrogen Safety Requirements Do not connect or disconnect power cables when the