Abstract: A hybrid energy system is configured to carry a power load for a generator configured to output an AC signal. The hybrid energy system includes a plurality of battery banks, and a renewable energy source. The plurality of battery banks includes a low cycle life battery and a high cycle life battery. When the renewable energy source is outputting more power than required by a load, the access energy is used to recharge the plurality of battery banks. The low cycle life battery is only recharged once a day by the renewable energy source. The high cycle life battery can be recharged by both the renewable energy source and the generator.

Abstract: Regenerators for Stirling engines and Vuilleumier heat pumps are difficult to reliably manufacture. A regenerator is disclosed in which edges of the regenerator wire meshes are coated with a stabilizing material. The regenerator wire meshes are then sufficiently stable to be machined to the dimensions of the housing. In some embodiments, the material on the outer surface of the edges of the regenerator is relatively thermally insulating to limit heat transfer to the housing.