It's a maketing call from National Grid to try and get you to sign up for balanced billing

National Grid also offers a variety of helpful programs and payment options, including:

? Balanced Billing -- National Grid's balanced billing program helps to spread payments out more evenly across the year. This is particularly helpful to those on fixed incomes. Customer sign-up is free of charge, and participants may choose to cancel at any time. To find out your proposed Budget Plan amount or enroll, call 1-800-930-5003 or visit www.nationalgridus.com.

Received call from 800-930-5003 on Sunday, April 27th.  Voice mail left with no message on it.  Must be a scam of some sort.