According to some aspects, a power regulation system for energy harvesters that lacks a battery is provided. In some embodiments, the power regulation system may receive power from multiple energy harvesters that generate energy from different sources, such as wind currents and ambient light. In these embodiments, the power regulation system may selectively provide power from one or more of the energy harvesters to a load as environmental conditions change and power itself with energy from the energy harvesters. Thereby, the power regulation system may start and operate without a battery and provide power to the load over a wider range of environmental conditions.