What happened
PJM is considering changes to its surplus interconnection process after limited use of the existing pathway. The approach can allow new generation or battery storage to connect at existing power facilities using available interconnection capacity.
What this means for homeowners
This is not a residential interconnection rule, but faster storage and generation deployment in PJM can influence regional capacity costs, grid reliability and long-term electricity prices that ultimately matter to homeowners considering solar and batteries.
Key points
- PJM is reviewing reforms to an existing surplus-interconnection process.
- Similar pathways in other grid regions are studying large amounts of mostly battery storage capacity.
- Grid-level storage growth can affect reliability and wholesale costs even when projects are not customer-sited.
How we use this information
Home Solar Atlas does not automatically change calculator assumptions from a news headline. Policy, tariff and incentive changes are incorporated into our data tools only after the applicable dates, eligibility rules and homeowner impact can be represented accurately.