The best energy storage system for solar panels lies in lithium-ion batteries. These batteries excel due to their higher efficiency, longer lifespans, better depth of discharge (DoD), and greater energy density compared to other types of batteries, such as lead-acid for example.
The hybrid approach stores energy for later use in one or multiple solar batteries but can also pull from the grid in high energy use periods like hot summer months. Any solar-plus-storage system that is not meant to be entirely off-grid will be a hybrid system.
Storage helps solar contribute to the electricity supply even when the sun isn’t shining. It can also help smooth out variations in how solar energy flows on the grid. These variations are attributable to changes in the amount of sunlight that shines onto photovoltaic (PV) panels or concentrating solar-thermal power (CSP) systems.
Hybrid solar systems are both grid-tied and storage-ready. Most solar system owners should choose a grid-tied solar system because it's typically the most cost-effective. You may go off-grid if you live in a remote area, don't consume much electricity, and have the capital to invest in a complete home storage backup system.
Grid-tied solar panel systems are best for homeowners with access to full-retail net metering and don’t experience frequent power outages. With true net metering, a grid-tied system can earn the best solar savings of all the system types because the equipment costs are low.
Solar energy storage systems offer round-the-clock reliability, allowing electricity generated during peak sunshine hours to be stored and used on demand, thus balancing the grid and reducing the need for potential cutbacks. They enhance resilience by providing uninterrupted power, particularly critical for essential services during outages.