SolarEdge has announced the approval of its Nexis IslandDER meter collar for use in the service territories of Pacific Gas and Electric (PG&E) and San Diego Gas and Electric (SDG&E) in California. The move allows solar and energy storage installers in those utility service territories to more easily install SolarEdge Nexis energy storage solutions.
Meter collars, also called “meter socket adapters” (MSAs), are installed between a utility meter and the meter socket in a residential installation and enable a direct, two-way electrical connection between distributed energy resources like solar and battery inverters and the homes at which they are installed. This differs from the traditional method of installing these resources, which often involves more complex electrical work to rewire circuits in the home’s main electrical panel.
SolarEdge says the use of MSAs saves time and money for installers and their customers. Installers have also said they prefer to work with MSAs over doing complex rewiring.
“The IslandDER meter collar makes the interconnection process a lot simpler, and paired with SolarEdge Nexis it keeps the whole installation clean and straightforward,” said Zachary Hood, director of residential construction at San Diego-based installer Stellar Solar. “Anything that lets us put in solar and storage more efficiently is a win for our crews and for the homeowner.”
The Nexis IslandDER device, which was developed in collaboration with MSA maker ConnectDER, was specially designed to work with the Nexis inverter. Unlike the latter company’s analog MSAs, the Nexis IslandDER communicates with the SolarEdge inverter through a digital connection via a standard ethernet cable.
The Nexis IslandDER device is now among five MSA solutions approved by SDG&E, and among four approved by PG&E. The list of other approved devices includes MSAs from Tesla, Enphase and NeWorld. Testing is underway in PG&E territory on MSAs from Generac, Sigenergy and Span.
In addition to PG&E’s and SDG&E’s approvals of the Nexis IslandDER MSA, the device is also scheduled to complete witness testing for California’s other major utility, Southern California Edison.
Together, the three California companies serve more than 5.38 million residential customers in the state, and are among the 86 utilities in 33 states that have approved MSAs.
The SolarEdge Nexis ecosystem consists of a solar inverter that can deliver 13 kW of power when used on-grid and 14.5 kW when the grid is down, coupled with 5 kWh stackable modular battery blocks that are designed to be used in systems up to 80 kWh in size. The Nexis products were unveiled in late 2025 at the annual RE+ trade show in Las Vegas, and the components of the system became available nationwide in June, 2026.
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