For systems less that 50kW there is no interconnection fee. Once the solar panel system is installed, the customer must schedule, conduct, and submit verification/witness testing to receive final National Grid interconnection approval. The customer must submit the application and receive initial interconnection acceptance to then install the system. At that point, National Grid will provide requirements and an application package to the customer. To interconnect a solar panel system sized at 50 kW or less (including most residential systems), the customer’s proposed project plan, equipment, and specifications must be communicated to National Grid to determine the nature of the project. Owners of systems generating more than 60kW are required to install a dedicated phone line at the meter. Depending on review, in some instances there may be modification costs associated with the interconnection process. This involves filling out a simple application form, which is then evaluated by National Grid and receives approval. Most residential systems generate less than 15kW, making customers eligible for the Simplified Application Process. Your solar installer will usually help you complete your interconnection paperwork. Regardless of your utility, interconnection involves an application process. The process of connecting a solar panel system to the grid is known as interconnection. National Grid solar interconnection policies and costs Avoided cost rate is the cost National Grid would have incurred had it supplied the power itself. These net metering credits roll over monthly and at the end of the 12 month billing period any excess credits will be converted to a cash value and paid to the customer at SC6 (billing rate) avoided cost rate. When customers generate more energy than used, net metering credits are determined by multiplying the excess kWh generated by the current rate. This means that customers should not expect to receive a check or payment as compensation for accrued net metering credits as these credits do not expire. If these net metering credits are not allocated to National Grid accounts, unused credits will accrue on the account indefinitely. These credits are calculated and credited to the customer’s account where they accrue as a dollar-value credit on the bill. In months when customers generate excess energy that is sold back to National Grid, net metering credits are determined by multiplying the excess kWh generated by a customer’s solar panel system by the applicable rate. What will happen to my National Grid net metering bill credits? Massachusetts The cap is set at 100 MW, so the 85% capacity marker is set at 85 MW. The Public Service Commission requires each utility in New York to report when they reach 85% of their recommended net metering capacity so subsequent action can be determined. It is set at 2% of incremental net revenue, which is equivalent to 100 MW. Now, the net metering cap is determined by calculating net metering’s impact on the utility’s net revenue. In March 2017, New York State transitioned away from a “peak load” based cap. Most residential homes have a single-phase circuit – so, if your system is over 10 kW, there’s a good chance the net metering cap will apply. However, systems that have a nameplate rating less than 10 kW on a single-phase circuit or 25 kW on a three-phase circuit are exempt from the net metering cap. National Grid’s cap is 359.19 MW for private customers and 410.54 MW for public entities. As of April 2016, the net metering cap for Massachusetts limits net metering to 7% of a utility’s historical peak load for private customers and 8% for public entities. The net metering cap of a utility represents how many solar (or other renewable energy) installations can participate in the net metering program. What is National Grid’s net metering cap? Massachusetts The residential rate varies by month and can be viewed on National Grid's website. When a customer exports more energy than they use in a given month, they receive credits on their bill that are calculated by multiplying Supply Costs, Delivery, Market Settlement, State Assessment, and System Benefit charges by the number of excess kWh. Residential net metering on solar panel systems up to 25 kW is available through National Grid in New York. Most residential systems are under 20 kW, so they fall under this category. The value of the credit depends on the size of the customer’s solar panel system, and can be viewed on National Grid's website.įor customers with solar panel systems under 1,000 kW, the net metering credit is determined by multiplying the number of kilowatt hours (kWh) exported back to the grid by the sum of Supply Costs, Distribution, Basic Service, Transmission, and Transition. When a customer exports or feeds more power back to the grid than they use, they qualify for net metering credits. What are National Grid’s rates and prices for net metering? Massachusetts
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