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An honest breakdown of battery value for Unitil customers in Concord, Hampton, and Exeter. Unitil has the highest retail rate among NH investor-owned utilities at $0.26/kWh, giving batteries a slight edge in self-consumption value. But NH still has no TOU rates, no demand response, and no battery incentives.
Unitil serves approximately 11% of NH customers in the capital region (Concord, Hampton, Exeter). At $0.26/kWh, Unitil has the highest retail rate among NH's three investor-owned utilities, which means self-consumed solar is worth slightly more per kWh here. The NEM gap is the same $0.04/kWh as other NH utilities.
The primary value of a battery for Unitil customers is backup power during Nor'easters and ice storms, followed by self-consumption optimization at the $0.26 retail rate. Annual financial value is typically $550–$750 for a 13.5 kWh battery.
Like all NH investor-owned utilities, Unitil follows the NEM 2.0 framework established by Docket DE 16-576. Solar exports earn credits worth approximately 85% of the retail rate — not 1:1. The credit includes 100% of supply, 100% of transmission, and only 25% of distribution charges. This is locked through January 1, 2041.
Unitil Retail Rate
$0.26/kWh
Highest among NH IOUs
NEM Credit Rate
$0.22/kWh
~85% of retail rate
NEM Gap
$0.04/kWh
Battery captures this
Without a battery, midday excess solar is exported to Unitil and credited at $0.22/kWh. With a battery, that same solar is stored and used in the evening at the full $0.26/kWh retail rate. The $0.04/kWh difference adds up: a 13.5 kWh battery shifting 8 kWh/day saves roughly $117/year just from closing the NEM gap. This is modest compared to states with TOU spreads of $0.10–$0.15/kWh, but it is real and guaranteed through 2041.
Unitil's $0.26/kWh rate is a penny higher than Eversource ($0.25) and two cents higher than Liberty ($0.24). This translates to roughly 3–5% more annual battery value from self-consumption savings. The NEM gap ($0.04/kWh) is identical across all three IOUs because the 85% credit structure is set by the PUC, not individual utilities.
For a Unitil customer with a $200/month electric bill and a 13.5 kWh battery (Tesla Powerwall 3), here is the realistic first-year value breakdown:
| Value Stream | Annual Estimate |
|---|---|
| NEM Gap Capture | ~$120 |
| Self-Consumption | ~$245 |
| Backup Power Value | ~$200 |
| Rate-Rise Hedging | ~$50 |
| Year 1 Total | ~$615 |
At $9,500–$13,500 installed cost for a Powerwall 3 and no federal or state incentive, simple payback is 15–22 years. This exceeds the 10-year warranty for most batteries. Batteries in NH are primarily justified by backup power value and peace of mind, not by financial return alone.
Without TOU arbitrage or demand response revenue, NH battery value comes from four straightforward sources. Unitil's higher retail rate ($0.26) gives a slight edge on the first two categories compared to Eversource and Liberty.
~$100-175/yr
Unitil NEM credits are ~85% of retail ($0.22 vs $0.26). A battery shifts midday exports to evening self-use, capturing the $0.04/kWh gap.
~$260-390/yr
Every kWh stored and used directly avoids the full $0.26/kWh retail rate. Unitil's higher rate makes self-consumed solar worth slightly more than other NH utilities.
~$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.
Use our calculator to estimate battery savings for your specific situation. Select Unitil as your utility, enter your average monthly bill, and choose a battery size. The calculator accounts for NEM gap capture, self-consumption, backup value, and rate-rise hedging — but honestly reflects that NH has no TOU or demand response revenue.
See your estimated battery savings
Eversource NEM Rate Gap
Retail Rate
25.0¢
NEM Credit
21.0¢
Gap
4.0¢
Annual Value Breakdown (Year 1)
Cumulative Value
Year 1 Annual
$599
First-year savings
5-Year Total
$3,118
With rate escalation
10-Year Total
$6,574
Full warranty period
NH does not offer TOU rates, ConnectedSolutions, or battery demand response programs. Battery value in NH comes primarily from backup power and self-consumption optimization. These estimates are based on current utility rates and typical usage patterns.
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 $250–$600/kWh upfront) 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%) if the financing company begins construction before July 4, 2026 — 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%) for projects beginning construction before July 4, 2026. This savings is passed to you through lower monthly lease or PPA payments. After July 4, 2026, this path also closes.
No. None of NH's four utilities (Eversource, Liberty, Unitil, NHEC) offer residential time-of-use rates. All NH residential customers pay flat rates. This means there is zero TOU arbitrage opportunity — you cannot charge a battery cheaply at night and discharge at a higher peak rate. This is a significant difference from states like CT and MA that offer TOU options.
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 approximately 85% of retail rate (100% supply + 100% transmission + 25% distribution, per Docket DE 16-576). For Eversource customers, that means solar exports earn $0.21/kWh while retail electricity costs $0.25/kWh — a $0.04/kWh gap. A battery captures this gap by storing midday excess solar and using it in the evening instead of exporting. For a 13.5 kWh battery, this is roughly $100–$175/year in additional savings.
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%) for projects beginning construction before July 4, 2026. That savings is passed to you through lower monthly lease/PPA payments. After July 4, 2026, this path also closes.
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, the Section 48/48E ITC (30%) expires for projects not started by July 4, 2026.
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 higher retail rate ($0.26/kWh vs Eversource's $0.25/kWh) makes self-consumed solar worth slightly more per kWh. The NEM gap is the same ($0.04/kWh for both). Overall, Unitil customers see about 3-5% more annual battery value than Eversource customers with the same system size and usage pattern. The difference is modest but real.
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.