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We serve MA, NH, CT, RI, ME, VT, NJ, PA, and TX
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NuWatt designs, installs, and manages solar, battery, heat pump, and EV charger systems across 9 states. One company, one warranty, one point of contact.
Get a Free QuoteBackup power for outages, demand response revenue through ConnectedSolutions, and energy independence for your home.
Battery owners in MA, CT, RI, and VT earn up to $1,375/summer through ConnectedSolutions demand response.
9
New England + NJ, PA, TX
$1,375
avg summer earnings
10-12 hrs
essential loads (13.5 kWh)
3
Tesla, Enphase, Franklin
Battery storage delivers backup power, revenue from demand response, and greater control over your energy costs.
Keep your lights on, refrigerator running, and devices charged during grid outages. A 13.5 kWh battery powers essential loads for 10-12 hours.
Earn $225-$275/kW per summer by dispatching stored energy during peak demand events. A typical battery earns ~$1,375/summer in MA, CT, RI, and VT.
Store solar energy generated during the day and use it at night. Maximize the value of every kilowatt-hour your panels produce.
Reduce dependence on the grid and protect against rising utility rates. Battery storage puts you in control of your energy future.
Every other battery site shows you specs. We show you how long your actual appliances will run during an outage, whether you’re quietly locked into one vendor for life, and whether a generator would actually beat a battery over 25 years.
Tool 1 of 5
Pick the appliances you need during an outage (fridge, wifi, central AC, well pump, etc.) and see exact runtime in hours or days. Default battery: Tesla Powerwall 3. The tool accounts for duty cycles, peak-surge headroom, and optional solar recharge.
Pick what stays on during an outage
Critical loads
4 selected
Simulated runtime
Battery can handle thisRuntime
2.3
days
Avg load
0.2
kW (of 11.5 kW max)
Peak surge
3.5
kW (of 22 kW peak)
Runtime calculated from 13.5 kWh usable × 97% round-trip efficiency = 13.1 kWh effective storage, divided by average load. Duty cycles assume intermittent operation (fridges cycle ~40% of the time, AC ~50%).
Tool 2 of 5
The solar inverter you already have — or are about to install — determines which batteries you can add later. Some are battery-agnostic. Others trap you into a single vendor. This tool shows the real upgrade cost (including AC-coupling or inverter replacement) based on which battery brands you’re interested in. Default inverter: Enphase IQ8HC Microinverter.
What adding a battery later actually costs
When do you plan to add a battery?
Which battery brands interest you? (pick 1-3)
LOCKED — this inverter locks you into the Enphase battery ecosystem
Locked to the Enphase IQ battery ecosystem. Adding a Tesla Powerwall or Franklin WH would require replacing the microinverters with an AC-coupled string inverter.
Manufacturer reliability
Enphase · Enphase Energy Inc.
Yr-10 failure
0.2%
Claim turnaround
1 wk
Stability
Financially stable
Industry-leading reliability with published field data showing roughly a 0.2% failure rate at year 10. The only microinverter brand with transparent warranty claim data. Publicly traded (NASDAQ: ENPH) with strong US operations and 25-year warranties honored without friction. NuWatt installs Enphase as its default microinverter for residential systems where roof complexity or shade rules out a string approach.
Source: Enphase 2024 10-K + Bloomberg BNEF reliability tier 1 · Last reviewed 2026-04 · Full reliability report
Tesla
IncompatibleIncompatible. The Enphase ecosystem won't talk to a Tesla battery — you would need to replace this inverter or add a parallel AC-coupled inverter.
$18,750
$15,250 battery + $3,500 inverter swap
FranklinWH
IncompatibleIncompatible. The Enphase ecosystem won't talk to a FranklinWH battery — you would need to replace this inverter or add a parallel AC-coupled inverter.
$21,000
$17,500 battery + $3,500 inverter swap
Install Enphase IQ8HC Microinverter
Microinverter inverter, battery-ready · locked ecosystem
Add a battery (Tesla)
$15,250 for the Tesla battery + $2,500-$4,500 to replace this inverter.
Stay native (Enphase)
$14,450
Lowest upgrade cost — but you inherit this vendor for the life of the system.
AC-couple a different battery later
$18,700
Flexibility to pick any battery, but adds a second inverter ($3.5-5k) and commissioning labor.
Buy a battery-agnostic inverter up front
$15,950
Pay a small premium today (Sol-Ark, Fronius, SMA) and keep every battery brand on the table.
Future-proofing score
Enphase is largely locked. Changing your mind later will cost real money.
Methodology
Tool 3 of 5
The honest answer to the question homeowners actually ask. Adjust annual outage hours, pick a generator type (portable gas, dual-fuel, or 14/22 kW natural gas standby), and see the true 25-year cost including fuel inflation, maintenance, and replacement cycles. We designed this to be honest: for homes with very high outage hours, the right generator can beat a small battery on dollars alone. We’ll tell you when. Default battery: Franklin WH aPower 2 (whole-home backup).
25-year total cost of ownership
Verdict
Generator wins by $4,502
A 22 kW standby saves $4,502 over 25 years for 24 hrs/year of outage.
22 kW standby
25-year total
$31,578
FranklinWH aPower 2
25-year total
$36,080
Side-by-side
Net difference: -$4,502 in favor of the generator
Beyond dollars
CO2 emissions (25-yr)
Noise while running
Like a dishwasher
Cutover time
Battery = no lights flicker
How we calculated this
This tool is honest by design: for homes with high annual outage hours, the right generator can beat a small battery on dollars alone. Decide what you’re optimizing for — up-front cost, lifetime cost, silence, emissions, or never hearing a pull-cord again.
Tool 4 of 5
Virtual Power Plant (VPP) and demand-response programs pay residential battery owners for grid-support events. This is where it gets state-specific — and where most national comparison sites go silent. NuWatt tracks the exact program rates for Mass Save ConnectedSolutions, Eversource CT/NH, Rhode Island Energy, Green Mountain Power BYOD, and TX REP programs. Default battery: Tesla Powerwall 3, default state: Massachusetts.
Virtual Power Plant revenue by state for Tesla Powerwall 3
10 years
Estimated annual revenue
$1,500
per year from Mass Save ConnectedSolutions
10-year total
$15,000
before fees/taxes
Battery price offset
98%
of $15,250
Program structure
$/kW/yr
min 3 kW / 5 kWh
Annual revenue breakdown
About Mass Save ConnectedSolutions
Mass Save ConnectedSolutions pays residential battery owners $275/kW for summer peak-shaving events (typically 30-60 events per year, June-September) plus $50/kW for winter events. Highest-paying VPP program in the Northeast.
Administered by Eversource / National Grid / Unitil (Mass Save consortium) · Last reviewed 2026-04
Learn about enrollmentMethodology
VPP revenue estimates use published program rates from utility tariff filings and ConnectedSolutions program reports as of 2026. Actual payment depends on the number of events called, your battery’s performance during events, and ongoing enrollment. Rates change quarterly — re-run this calculator before making financial decisions. This is informational, not a guarantee of revenue.
Tool 5 of 5
The one question every prospect asks, answered with math specific to your state and battery. Combines the federal 30% ITC, state rebates, VPP revenue, TOU arbitrage savings, and solar self-consumption into a single 10-year NPV with a break-even year. Honest by design — for homes without VPP programs (NJ, PA), the tool shows smaller net savings; for homes without solar, the self-consumption value drops to zero. Default battery: Franklin aPower 2, default state: Massachusetts, solar on.
Full 10-year economics: ITC + rebates + VPP + TOU + solar
10 years
Typical: 280 (near-daily cycling)
Verdict
Strong financial case — net $11,435 over 10 years
Break-even in year 6 · Annual benefit $2,369
Upfront cost (after incentives)
Net upfront
$12,250
MA does not have a standalone upfront battery rebate. ConnectedSolutions pays ongoing.
Annual benefits (10-yr total)
10-year total
$23,685
Methodology & caveats
The NuWatt Honest Answer
Most battery sites leave you guessing about runtime, hide the lock-in problem, never compare honestly against generators, skip VPP revenue entirely, and never combine every financial factor into one 10-year NPV. We install the top 5 residential batteries in the US (Tesla Powerwall 3, Enphase IQ Battery 5P and 10C, Franklin aPower 2, sonnen sonnenCore+ 10) and we track every state-level VPP program across our 9-state service area — so every honest comparison lands on a battery we can actually deliver and every financial projection uses your state’s actual rates.
Get a quote with the battery you pickedNuWatt installs battery storage across 9 states. Each state has unique incentive programs and demand response opportunities.
NuWatt installs the top-rated home battery systems. Each offers backup power, demand response compatibility, and solar integration.
ConnectedSolutions is a demand response program that pays battery owners to dispatch stored energy during peak grid demand events. Your battery charges overnight or from solar, then discharges during afternoon peak hours when the grid needs it most.
The program runs during summer months only (June-September). Events typically last 1-3 hours and are called by the utility during extreme heat days. Battery owners receive annual payments based on their battery capacity.
Massachusetts
$275/kW/year
Connecticut
$225/kW/year
Rhode Island
$250/kW/year
Vermont
$850/year
Federal, state, and utility incentives for home battery storage. Visit your state page for full details on available programs.
The 30% residential energy storage tax credit expired December 31, 2025. Homeowners purchasing batteries with cash or a loan no longer receive any federal tax credit. Third-party owned systems (leases/PPAs) may still qualify under Section 48/48E.
State-level programs are the primary incentives for battery storage. Connecticut offers up to $7,500 and Maine up to $4,000 in direct rebates.
Many utilities offer additional battery rebates that stack with state programs. Rebate amounts vary by utility. Visit your state page or enter your town for utility-specific rebate details.
Annual revenue for battery owners in MA, CT, RI, and VT. Earn $1,125-$1,375 per summer with a 5 kW battery. Payments continue for the life of the program.
From assessment to installation, NuWatt handles the entire process with dedicated local crews.
We evaluate your electrical panel, energy usage, outage history, and solar system (if applicable) to recommend the right battery size and configuration.
Our engineers design your battery system, handle all permits, and apply for available state rebates, utility incentives, and ConnectedSolutions enrollment.
NuWatt electricians install your battery in 1-2 days. We handle utility interconnection and system commissioning. Your battery is operational and earning revenue.
Find out which battery system is right for your home, what incentives you qualify for, and how much you can earn from ConnectedSolutions.