These sophisticated devices work by storing electricity—either from the grid during off-peak, cheaper hours or from your own renewable sources like solar panels. . This ESS Buyer's Guide is a comprehensive list of what each brand is offering in the residential and C&I space heading into 2025. We sent a questionnaire to every manufacturer to ascertain their top product and what components are included. Is it a hybrid inverter with a roster of battery partners?. Solar power storage for home systems allow you to capture excess electricity generated by your solar panels and use it when the sun isn't shining.