Renewable energy technologies, such as wind and solar, are characterized by variable outputs of energy production (when the sun sets and wind speeds slow). Storage solutions address these production fluctuations by compensating electricity from storage when necessary and contributing to a more flexible and reliable grid system. The following collection of portable batteries can be easily set up for off-grid cabin life and light enough to be hauled to long-term camping sites. Additionally, they can be easily connected to a variety of portable solar and wind generators.