A home battery gets sold on two different promises at once: it can keep your lights on during an outage, and Massachusetts has a program that pays you for having it. Those are genuinely separate questions, and the second one, including the actual ConnectedSolutions dollar figures and how they compare to the SMART battery adder, is covered in depth in Solar Batteries in Massachusetts: Backup Power and ConnectedSolutions. This article focuses on the first question: what it actually takes for a battery to protect you during an outage, and whether enrolling in a utility program gets in the way of that.
Backup power is a wiring and sizing decision, not a program feature
Whether a battery keeps any part of your home running when the grid goes down depends on how the system is installed, not on which utility programs you've enrolled in. Two configurations come up most often. A critical loads panel is a separate, smaller panel wired to carry only the circuits you've chosen as essential, refrigerator, some lighting, a sump pump, maybe internet equipment, while everything else on your main panel stays dark during an outage. Whole-home backup instead ties the battery and backup inverter into your main panel so the entire house can keep running, generally for a shorter stretch of time on a given battery size, since it's serving more load at once.
Neither configuration happens automatically just because a battery is installed. It requires a backup-capable inverter and, for most systems, an automatic transfer switch that disconnects your home from the grid during an outage and switches the battery to backup mode. A solar-plus-battery system installed purely for bill savings, without that hardware, may not power anything during a blackout. This is squarely a question for your installer's quote, not something to assume from a brochure.
Does ConnectedSolutions compete with your outage protection?
This is the part that creates the most confusion, so it's worth being precise about what ConnectedSolutions actually is. It's a Mass Save program available to battery-storage customers of Eversource, National Grid, or Cape Light Compact that pays you based on your battery's measured average performance during defined summer events. According to National Grid's own program page, those events run only between June 1 and September 30, on non-holidays, between 3 p.m. and 8 p.m., with no more than 60 events called in a summer and each lasting up to three hours. Mass Save's own battery storage page confirms the same eligible sponsors and structure. The incentive rate is $275 per kilowatt of average performance, and a participant may opt out of the program at any time.
The key fact for outage protection specifically: these are demand-response events that happen during normal grid operation. The utility calls an event because demand on the functioning grid is high, not because the grid is down. When the grid actually fails, whether from a storm, an equipment fault, or anything else, there is no ConnectedSolutions event to dispatch into, because there's no functioning grid to export to. Your backup-capable inverter and transfer switch are what island your home from the grid and power it off the battery at that point, and that's a separate mechanism from the demand-response program entirely.
That said, treat the exact behavior of your specific battery and your specific manufacturer's enrollment platform, including how much charge it keeps in reserve day to day and whether it has any automatic storm-protection feature, as something to confirm with your installer and the manufacturer's own documentation, not something this article can state as a universal guarantee across every battery brand. Programs and equipment both change, and a dollar figure or event rule stated here should be verified at masssave.com before you rely on it.
Sizing a battery for outage protection specifically
If outage protection, not program income, is your main reason for wanting a battery, size and configuration matter more than the headline kilowatt-hour number on a spec sheet. A few questions worth working through with an installer before you sign anything:
- Is this quote proposing a critical loads panel or whole-home backup, specifically, and which circuits are included either way?
- How many hours of backup does the proposed battery size actually provide for those specific circuits, not a generic marketing estimate?
- Does the system include the backup-capable inverter and automatic transfer switch needed to island from the grid, or is that a separate line item?
- If ConnectedSolutions enrollment is part of the pitch, who sets it up, the installer or you directly through the battery manufacturer's platform?
A specific, written answer to each of these tells you more than any single number on a brochure.
Winter storms and backup planning
Massachusetts outages cluster around winter storms as much as summer heat, and a battery sized and configured for backup protection works the same way in either season, since it's about islanding the home and running selected (or all) circuits, not about the ConnectedSolutions event window, which only runs in summer. If reliable backup through winter storm season matters to you, say so directly when comparing installer quotes, since a system optimized purely for maximizing ConnectedSolutions participation and one optimized for winter outage resilience are not automatically the same design.
What to verify before you sign
Confirm which utility serves your address, since eligibility for ConnectedSolutions and its rate structure is set by your specific utility, not standardized across Massachusetts: see Solar for Eversource Customers or Solar for National Grid Customers for utility-specific detail, or the broader Massachusetts solar hub and Massachusetts solar incentives pages. Get the critical-loads-versus-whole-home question answered in writing. And separate, in your own head and in the quote itself, what you're paying for backup capability from what you might earn through ConnectedSolutions participation, since they're priced, installed, and documented differently even when they live in the same battery. For how solar performs in Massachusetts winters more broadly, see Does Solar Work Well During Massachusetts Winters?, and for the full financial breakdown of ConnectedSolutions and the SMART battery adder, see Solar Batteries in Massachusetts: Backup Power and ConnectedSolutions.
Start your free, no-obligation solar assessment and ask directly whether the battery in your quote is configured for critical-loads or whole-home backup, and what that actually covers during an outage.
Frequently asked questions
Will a solar battery automatically keep my power on during an outage?
Not automatically. It depends on whether the system includes a backup-capable inverter and transfer switch, and whether it's configured for critical-loads or whole-home backup. Confirm this specifically with your installer rather than assuming it from the battery's size alone.
Does enrolling in ConnectedSolutions reduce my backup power during a real outage?
ConnectedSolutions events happen during normal grid operation, not during an outage, since the program depends on a functioning grid to export to. Confirm your specific battery and manufacturer platform's reserve and storm-handling behavior directly, since this can vary by equipment.
Is ConnectedSolutions available to every Massachusetts utility customer?
No. It's available to battery-storage customers of Eversource, National Grid, and Cape Light Compact specifically. Confirm your utility and current program terms at masssave.com.
Should I prioritize backup protection or ConnectedSolutions income when sizing my battery?
That depends on your own priorities, and the two aren't mutually exclusive, but a system optimized purely for one isn't automatically optimized for the other. Start your quote and tell a prospective installer which one matters more to you.
