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New Hampshire has no TOU rates, no demand response, and no state battery rebate. That makes the battery value equation fundamentally different from neighboring states. Here is how each utility stacks up for solar + storage in 2026.
3
IOUs Compared
$0.04
NEM Gap (All 3)
$0 TOU
No Arbitrage
$0 ITC
25D Expired
Short answer: For economics alone, batteries are a tough sell in New Hampshire. Without time-of-use rates, demand response programs, or state rebates, a 13.5 kWh battery saves roughly $600-750/year through NEM gap capture and self-consumption optimization. At $9,500-$13,500 installed with no federal tax credit, simple payback is 13-20+ years -- often beyond the 10-year warranty.
However: If backup power during Nor'easters and ice storms matters to you, the resilience value changes the equation. And if you go the TPO/lease route, the financing company can still claim the Section 48/48E ITC (30%) on projects beginning construction before July 4, 2026, reducing your effective cost significantly.
Bottom line: NH batteries are a backup-power purchase first, an economics play second. The math improves if you pair with a TPO solar+battery system.
All three NH IOUs have flat residential rates and similar NEM gaps. The differences come down to retail rate, territory size, and installer availability.
| Utility | Retail Rate | NEM Credit | NEM Gap | TOU Available | Demand Response | Annual Battery Value* |
|---|---|---|---|---|---|---|
| Eversource ~71% of NH | $0.25/kWh | $0.21/kWh | $0.04 | No | None | $599 |
| Liberty ~6% of NH | $0.24/kWh | $0.20/kWh | $0.04 | No | None | $590 |
| Unitil ~11% of NH | $0.26/kWh | $0.22/kWh | $0.04 | No | None | $609 |
* Based on 13.5 kWh battery, $175/mo electric bill, 8 kW solar system. Includes NEM gap capture, self-consumption, backup value ($200), and rate-rise hedging ($50).
Key finding: All three NH utilities show nearly identical battery economics because they share the same NEM 2.0 structure (Docket DE 16-576) and all use flat rates. Your utility choice does not significantly impact whether a battery makes financial sense in NH. Unitil customers get marginally more value per self-consumed kWh due to the slightly higher retail rate ($0.26 vs $0.25).
New Hampshire is missing every major battery value stream that makes storage financially compelling in Massachusetts, Connecticut, and even Maine. Here is what NH does not have.
Without TOU or demand response, NH battery value comes from four sources. Combined, they total roughly $600-800/year for a typical 13.5 kWh system.
$100-175/yr
NEM 2.0 credits are ~85% of retail. Every kWh shifted from export to self-use saves $0.03-0.04/kWh.
$250-375/yr
Store midday solar for evening use. Avoid buying grid power at $0.25-0.26/kWh during peak household hours.
~$200/yr
Nor'easters and ice storms cause multi-day outages. A battery keeps critical loads running when the grid fails.
~$50/yr (growing)
NH rates are 48% above national average and rising ~5%/yr. Lock in more self-consumption now to hedge future increases.
NEM Gap
$113
Self-Consumption
$236
Backup
$200
Rate Hedging
$50
Annual Total
$599/yr
While the NEM gap is identical across all three IOUs, each territory has unique factors that affect your battery decision. Click through to the detailed guide for your utility.
Manchester, Nashua, Portsmouth | ~71% of NH customers
Retail Rate
$0.25/kWh
NEM Credit
$0.21/kWh
NEM Gap
$0.04/kWh
Verdict: Best value (highest volume). 10-year battery value: $6,574.
Read full Eversource battery guideSalem, Keene, Littleton | ~6% of NH customers
Retail Rate
$0.24/kWh
NEM Credit
$0.20/kWh
NEM Gap
$0.04/kWh
Verdict: Same gap, fewer installers. 10-year battery value: $6,471.
Read full Liberty battery guideConcord, Hampton, Exeter | ~11% of NH customers
Retail Rate
$0.26/kWh
NEM Credit
$0.22/kWh
NEM Gap
$0.04/kWh
Verdict: Highest rate = best self-consumption. 10-year battery value: $6,689.
Read full Unitil battery guideNH sizing is driven by backup needs more than economics. Ice storms can knock out power for days, especially in rural areas where utility repair crews take longer to reach you.
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.
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.
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.
If you heat with a heat pump, your winter electricity usage spikes significantly. A 13.5 kWh battery that covers your summer evening needs may only last 4-6 hours in winter with heat pump loads running. Rural NH homes with well pumps should also factor in the well pump's startup surge (typically 3-5x running watts). For whole-home winter backup with heat pump coverage, consider 20+ kWh or pair battery with a propane generator.
We believe in transparent economics. Here is the unvarnished payback math for each battery size in NH.
| Battery | Installed Cost | Annual Value | Simple Payback | 10-Year Value | Verdict |
|---|---|---|---|---|---|
| Enphase IQ 5P 5 kWh | ~$6,750 | $381/yr | 17.7 years | $4,075 | Beyond warranty |
| Tesla Powerwall 3 13.5 kWh | ~$11,500 | $599/yr | 19.2 years | $6,574 | Beyond warranty |
| Enphase IQ Battery 10C x2 20 kWh | ~$20,000 | $713/yr | 28.1 years | $7,881 | Beyond warranty |
In most NH scenarios, battery payback exceeds the 10-year warranty period. This means the battery may degrade significantly before it pays for itself through energy savings alone. Compare this to Massachusetts, where ConnectedSolutions alone generates $1,500-2,000/year, achieving payback in 5-7 years. NH battery purchases are primarily justified by backup power value and the peace of mind it provides during winter storms -- not by pure economics.
Section 25D is dead for homeowner-owned systems. But there is a window for third-party ownership.
Example: A 13.5 kWh Tesla Powerwall 3 installed for $12,000 via cash/loan has $0 federal incentive in 2026. The same battery via a TPO lease where the financing company claims 30% ITC effectively reduces your cost to ~$8,400 equivalent through lower monthly payments. That difference alone can shave 4-5 years off your payback timeline.
Honest answers to the most common questions about battery storage in New Hampshire.
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.
All three NH IOUs (Eversource, Liberty, Unitil) have similar NEM gaps of $0.04/kWh, so battery economics are comparable across utilities. Unitil has the highest retail rate ($0.26/kWh), making self-consumed solar slightly more valuable. Eversource has the most installer options due to its 71% market share. Liberty territory may see slightly higher installation costs due to fewer local installers.
NH battery economics are significantly weaker than MA or CT. Massachusetts ConnectedSolutions pays $225-275/kW/year for battery dispatch — a 13.5 kWh battery earns $1,500-2,000/year from demand response alone. Connecticut's ESS program pays $225/kW/year. NH has zero demand response and zero TOU arbitrage. NH battery payback is 13-20+ years vs. 7-10 years in MA/CT with incentives.
Eversource NH Battery Deep-Dive
Full guide for Eversource territory (71% of NH)
Liberty Utilities Battery Guide
Battery strategy for western NH territory
Unitil Battery Guide
Battery guide for Concord, Hampton, Exeter
NH Solar Panel Cost 2026
Updated pricing, payback, and installer comparison
NH Net Metering Guide 2026
NEM 2.0 rules, ~85% retail credit, locked through 2041
Cash vs Loan vs Lease in NH
Financing comparison with post-ITC math
NH Solar Lease/PPA Guide 2026
How TPO works with Section 48/48E ITC
Eversource vs Liberty vs Unitil: Solar Rates
Rate comparison for all three NH IOUs
We will design a solar+battery system sized for your utility territory, backup needs, and budget. Honest economics -- we will tell you if a battery makes sense for your situation or if solar-only is the better investment.
No pressure, no spam. We serve all three NH utility territories.