Batteries or battery packs without an integrated inverter must be paired with an external, third-party inverter to connect to your solar panel system and home.
One of the best-known–and most installed–products in the market is the LG Chem RESU10H, a battery that does not come with an integrated inverter. It must be connected with a storage inverter to interface with your solar panel system and your home. It's most frequently connected with a SolarEdge StorEdge inverter, which has recently been upgraded to the EnergyHub inverter. The RESU 10H can be installed as a part of an AC or DC-coupled solar plus storage system. Because it only requires one inversion process (from DC to usable AC electricity in your home), it boasts one of the highest true round-trip efficiencies of any product in the market when looking at the energy ultimately usable in your home.
Another well-known battery cell manufacturer, SimpliPhi's products, must be paired with an external inverter. Its modular and stackable battery packs provide the storage alone but are "inverter agnostic," which is the industry's way of saying they work with anyone. Its most popular battery is the 3.8 kWh battery module, which can be stacked and nestled next to your inverter on the wall next to your electrical panel.
A more recent entrant into the energy storage space, the Hawai'i-based Blue Planet Energy's products are "grid-optional" batteries. The company integrates battery modules into a "cabinet" that houses and provides the electrical connections for each battery module. The Blue Ion 2.0–their flagship residential product–is a battery-module-filled cabinet that can integrate with several inverter brands, including Sol-Ark, Schneider, Enphase, and SolarEdge, in AC-coupled designs.
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