Full FAQ document: IslandDER FAQs
What is IslandDER™ and what does it do?
IslandDER™ is a Meter Socket Adapter (MSA) that functions as a Microgrid Interconnect Device (MID). It safely disconnects a home from the grid during an outage, allowing residential energy systems like solar, batteries, and V2H/V2G to create a "microgrid" and provide backup power.
How does IslandDER™ benefit installers?
It provides a cost-effective way to enable whole-house and partial backup, avoiding common issues with MIDs and CTs in meter-main combination panels (common in the Western and Southern U.S.). It eliminates the need for complex electrical work like circuit relocation or main panel upgrades, and offers compatibility with many third-party battery systems.
What is a meter-main combo panel and why is IslandDER™ valuable for them?
Meter-main combination panels combine the meter socket and breaker box in a single enclosure, making the electrical connection between the meter and the main service disconnect inaccessible. This traditionally required costly service replacement or complex circuit relocation. IslandDER™'s design bypasses these challenges entirely.
Does IslandDER™ require a neutral wire?
No. Since IslandDER™ does not include a DER power connection, a neutral (grounded) conductor is not required. Neutral lug options are provided on the back of the MSA for unique circumstances — see the installation manual for details.
Does IslandDER™ support partial-home backup?
Yes. For whole-house backup, it is installed in the main meter socket. For partial backup, it can be installed in a second customer-owned meter socket between the main panel and a backup loads panel. Refer to the installation manual for more information.