Ballard Power Systems vs. Bloom Energy: Which Hydrogen Stock is a Better Buy? Posted byOleksandr Pylypenko March 17, 2022 Leave a comment on Ballard Power Systems vs. Bloom Energy: Which Hydrogen Stock is a Better Buy? In today’s article I will analyze and compare Ballard Power Systems (BLDP) and Bloom Energy (BE) to determine which stock is currently a better buy.