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An honest breakdown of battery value for Unitil customers in Concord, Hampton, and Exeter. Unitil's verified all-in residential rate is $0.2920/kWh at 600 kWh/month. Its published summary does not provide enough component detail to verify a NEM export credit, so this page does not calculate savings.
Unitil serves approximately 11% of NH customers in the capital region (Concord, Hampton, Exeter). Its current all-in residential reference is $0.2920/kWh at 600 kWh/month. Schedule QF and the current delivery table derive a $0.20625/kWh Alternative Net Metering credit for eligible small customer-generators taking Unitil Default Service.
The primary value of a battery for Unitil customers is backup power during Nor'easters and ice storms, followed by self-consumption. A defensible annual financial value requires interval usage, export volume, battery losses, installed cost and the customer's supplier terms.
Like all NH investor-owned utilities, Unitil follows the NEM 2.0 framework established by Docket DE 16-576. Solar exports earn credits under the applicable tariff. Schedule QF and the current delivery table separate the required components for eligible small customer-generators taking Unitil Default Service. Competitive-supplier export terms remain supplier-specific.
Unitil Retail Rate
$0.2920/kWh
All-in at 600 kWh/month
NEM Credit Rate
$0.20625/kWh
Eligible small Default Service generator
NEM Gap
$0.08575/kWh
Tariff gap, before battery losses
Battery gap-capture value is the avoided variable import rate minus the verified export credit, adjusted for round-trip losses. Unitil's source-proven tariff gap is $0.08575/kWh for the stated eligibility case. NuWatt does not turn that difference into a dollar savings claim without actual load, exports, losses, cost, financing, and supplier inputs.
The current Unitil residential, delivery, and Schedule QF tariffs verify the $0.2920/kWh all-in import reference and $0.20625/kWh Alternative Net Metering credit for eligible small customer-generators taking Unitil Default Service.
NuWatt still holds annual savings, payback and lifetime-savings outputs. A customer-specific analysis should use interval load and export data, battery losses, installed cost, financing terms, and the customer's supplier terms.
Without TOU arbitrage or demand response revenue, NH battery value can come from four sources. The export-credit-dependent portion must still be calculated from actual exports and battery losses.
Needs verification
Unitil does not publish enough separated tariff components in its residential summary to derive the NEM credit. Do not model gap-capture savings until Unitil supplies a written, account-specific value.
Usage-specific
Every kWh stored and used directly can avoid a future import at Unitil's current variable import rate, but annual value depends on interval load, solar exports, battery losses and operating mode.
~$200/yr
Seacoast area (Hampton, Exeter) is prone to Nor'easters and coastal storms. Capital region (Concord) faces inland ice storms. Outage avoidance value is real.
~$50/yr
Unitil rates have climbed steadily. Battery + solar locks in more zero-cost electricity, reducing exposure to future increases. Value grows over time.
NuWatt does not calculate Unitil battery savings from an inferred export credit. Obtain a written export-credit value from Unitil and use interval usage and solar-export data for an account-specific analysis.
Unitil serves a compact but diverse territory spanning New Hampshire's capital region and seacoast. Each area has distinct considerations for battery storage. Concord is the state capital with government-related infrastructure, while Hampton and Exeter sit in the seacoast region where Nor'easters are a regular threat.
State capital with government buildings, schools, and residential neighborhoods. Inland location faces ice storms in winter. Moderate solar irradiance with good south-facing roof potential.
Coastal community with year-round and seasonal homes. Nor'easters bring extended power outages. Salt air requires durable equipment. High property values make battery investment proportional.
Historic town with mix of older and newer housing stock. Seacoast exposure to storms. Growing solar adoption. Proximity to Hampton and Portsmouth installer networks keeps costs competitive.
Seacoast storm exposure: Hampton and Exeter homeowners face more frequent power outages from coastal storms than inland NH communities. Multi-day outages from Nor'easters are not uncommon in the seacoast area, making backup power especially valuable. A battery paired with solar provides indefinite daytime backup as long as the sun is shining.
Battery sizing depends on your goals: NEM gap optimization requires less capacity than whole-home backup. Here are three common scenarios for Unitil-territory homes.
5 kWh
Enphase IQ 5P · 5 kW
Small / starter battery. Best for homes with modest evening usage. Provides 4–8 hours of essential backup (fridge, lights, router). Shifts ~3–4 kWh/day from export to self-use. Lowest upfront cost but limited backup capacity.
13.5 kWh
Tesla Powerwall 3 · 11.5 kW
Medium / most popular option. Covers most homes' evening electricity needs. Provides 12–24 hours of essential backup or 6–10 hours of moderate usage. Shifts ~8–10 kWh/day from export to self-use. Best balance of cost and capability.
20 kWh
Enphase IQ Battery 10C x2 · 10 kW
Large / whole-home backup. Two stacked Enphase units for maximum capacity. Provides 24–48 hours of essential backup. Can handle larger loads (well pump, EV charger). Higher upfront cost but most resilience. Good for rural NH homes far from utility repair crews.
These are the most commonly installed residential batteries in New Hampshire. Prices shown are fully installed (equipment + labor + permitting). NH has no sales tax, which helps. No federal or state incentive reduces these costs for homeowner-owned systems in 2026.
| Model | Capacity | Power | Installed Cost | Warranty |
|---|---|---|---|---|
Tesla Powerwall 3 Integrated inverter, highest continuous power output. Most p... | 13.5 kWh | 11.5 kW | $9,500–$13,500 | 10 years, 70% capacity retention |
Enphase IQ Battery 5P Modular design — add units as budget allows. Pairs perfectly... | 5 kWh | 3.84 kW | $5,500–$8,000 | 10 years or 4,000 cycles |
Enphase IQ Battery 10C Larger Enphase option with improved power output. Stackable ... | 10.08 kWh | 5 kW | $8,500–$12,000 | 10 years or 4,000 cycles |
SolarEdge Home Battery DC-coupled — slightly higher efficiency. Best when paired wi... | 9.7 kWh | 5 kW | $7,500–$11,000 | 10 years, 70% capacity retention |
Franklin WH aPower Whole-home backup capable with integrated transfer switch. G... | 13.6 kWh | 5 kW | $9,000–$13,000 | 12 years |
Generac PWRcell Scalable 3–18 kWh. From the generator company — strong brand... | 9 kWh | 4.5 kW | $8,000–$12,000 | 10 years |
Prices reflect Q1 2026 NH market data. Actual cost depends on installer, electrical panel upgrades, and site conditions. Rural NH locations may see higher labor costs.
Transparency matters. Many battery marketing materials assume TOU rates, demand response, or state incentives that simply do not exist in New Hampshire. Here is what Unitil customers will not find:
NH utilities (Eversource, Liberty, Unitil, NHEC) offer flat residential rates only. There is no TOU option, so there is zero TOU arbitrage value for batteries in NH.
NH has no residential demand response battery program. Unlike MA ($225–$275/kW/year) and CT (ESS $225/kW/year), NH batteries earn $0 from grid services. This is the single biggest gap in NH battery economics.
NH offers no state-level incentive for battery storage. Unlike CT (ESS $30-$130/kWh at enrollment plus $300-$550/kW/year for ten years) or MA (ConnectedSolutions), NH has no financial support for residential batteries.
No NH utility offers a battery incentive, rebate, or enrollment program. Battery value is entirely from self-consumption and backup — no utility payments.
Section 25D expired December 31, 2025. Homeowner-purchased batteries receive $0 federal tax credit in 2026. TPO/lease batteries may benefit from Section 48/48E (30%): financing companies that began construction on or before July 4, 2026 locked in the full timing pathway, and projects that begin later still qualify but generally must be placed in service by Dec 31, 2027 — savings passed to homeowner through lower lease payments.
While homeowner-purchased batteries get $0 federal tax credit, third-party owned (TPO) systems may still benefit. The financing company — not the homeowner or installer — can claim the Section 48/48E commercial ITC (30%). Projects that began construction on or before July 4, 2026 locked in the full credit timing, and new starts still qualify if placed in service by December 31, 2027. This savings is passed to you through lower monthly lease or PPA payments.
Time-of-use availability is utility- and tariff-specific. Unitil now publishes optional whole-house residential TOU and EV-only TOU rates; do not assume a statewide flat-rate structure. Verify eligibility and the current tariff before modeling battery arbitrage.
No. NH has no demand response program for residential batteries. In Massachusetts, ConnectedSolutions pays $225–$275/kW/year for battery dispatch during peak events. In Connecticut, the ESS program pays $225/kW/year. NH offers nothing comparable — your battery earns $0 from grid services. This is the single biggest missing piece in NH battery economics.
NH NEM 2.0 credits are utility-specific. For the current Eversource residential reference, the verified all-in rate is $0.2906/kWh at 600 kWh/month and the derived export credit is $0.1996/kWh. Battery value still depends on actual imports, exports, load timing, efficiency, and tariff eligibility; do not publish a fixed annual savings figure without those inputs.
Financially, NH battery economics are modest. Without TOU arbitrage, demand response payments, or state/federal incentives, a typical battery saves $500–$700/year through NEM gap capture and self-consumption optimization. At $9,000–$13,000 installed cost, simple payback is 13–20+ years — often beyond the 10-year warranty. However, if backup power during outages is important to you (Nor'easters, ice storms), the non-financial value can justify the investment. Third-party owned batteries via lease/PPA may be more attractive since the financing company can still claim the 48/48E ITC (30%).
For essential loads only (refrigerator, lights, router, phone charging, ~1–2 kW continuous): a 5 kWh battery provides 4–8 hours of backup. For moderate loads (essentials + well pump, ~3–5 kW): a 13.5 kWh battery provides 6–12 hours. For whole-home backup including electric heat or EV charging: 20+ kWh is recommended. NH ice storms can cause multi-day outages, so pairing solar + battery for daytime recharging extends backup indefinitely during daylight hours.
Modern lithium-ion batteries (LFP chemistry) perform well in cold climates. Most residential batteries are installed in garages, basements, or utility closets where temperatures stay above freezing. Tesla Powerwall, Enphase, and Franklin WH units have internal thermal management. Expect 10+ years of useful life with gradual capacity degradation (most warranties guarantee 70% capacity at 10 years). NH's cold but not extreme temperatures are within normal operating range for all major battery brands.
No — for homeowner-purchased systems. Section 25D expired December 31, 2025. Homeowners who buy batteries with cash or a solar loan receive $0 federal tax credit in 2026. However, if you lease or PPA your solar+battery system, the third-party financing company can still claim the Section 48/48E commercial ITC (30%). July 4, 2026 was the begin-construction safe-harbor date, not an expiry: projects that began construction on or before it locked in the full timing pathway, and projects that begin later still qualify but generally must be placed in service by December 31, 2027. That savings is passed to you through lower monthly lease/PPA payments.
There is no announced timeline for NH to introduce battery incentives, demand response, or TOU rates. HEAR rebates ($34.7M, anticipated spring 2026) are for heat pumps and weatherization, not batteries. If backup power is your primary motivation, there is no reason to wait. If economics are your primary driver, waiting for potential future programs makes sense — but nothing is guaranteed. The one time-sensitive factor: if you're considering a TPO/lease battery, July 4, 2026 was the Section 48/48E begin-construction safe-harbor date — starting on or before it locked in the full timing pathway, while later starts still qualify but must be placed in service by Dec 31, 2027, a tighter window.
Yes. Community Power Coalition of NH (CPCNH) customers use their IOU utility (Eversource, Liberty, Unitil) for delivery and net metering. A battery works identically whether you're on utility default supply or CPCNH supply — the NEM credit structure and delivery rates are unchanged. CPCNH may lower your supply rate by 5–15%, which slightly reduces the NEM gap (marginally less battery value from gap capture) but lowers your overall bill.
In 2026, typical installed costs in NH are: Enphase IQ 5P (5 kWh) — $5,500–$8,000. Tesla Powerwall 3 (13.5 kWh) — $9,500–$13,500. Two-battery systems (20+ kWh) — $16,000–$24,000. These prices include equipment, installation, permitting, and electrical panel work. NH has no state sales tax, which helps. Prices are slightly higher in northern NH and rural areas due to installer travel. No federal or state incentive reduces these costs for homeowner-owned systems in 2026.
Unitil's all-in residential reference is $0.2920/kWh at 600 kWh and its Alternative Net Metering credit derives to $0.20625/kWh for eligible small customer-generators taking Unitil Default Service. The $0.08575/kWh difference is not a battery-savings promise; model actual imports, exports, timing, losses, installed cost, and financing. Competitive-supplier terms differ.
No. As of February 2026, Unitil offers no battery rebate, demand response program, or storage-specific incentive. Battery value for Unitil customers comes entirely from NEM gap capture, self-consumption optimization, backup power, and rate-rise hedging. If Unitil introduces a battery program in the future, this page will be updated.
We serve Concord, Hampton, Exeter, and the surrounding Unitil territory. We will give you a transparent assessment of whether a battery makes sense for your specific home, usage, and backup needs — including an honest payback timeline.