Plug-in solar is an affordable option for many who might not be able to install traditional solar panels and save as electricity rates continue to rise in many areas. They range in cost from a few hundred dollars to over $2,000, but can save you hundreds of dollars a year.

The new battery-electrolyzer system is being piloted in Africa, with initial success in Malawi and planned tests for Zambia and Côte d’Ivoire coming soon. The system could help schools, homes, and more store energy for up to a month at a time, a huge benefit in remote areas with unreliable electricity access.

Home battery storage can save you a lot of money, especially when paired with solar panels. Even without panels, it allows you to power up when energy costs are lowest and use the stored power for your home during peak hours.