Loading NuWatt Energy...
We use your location to provide localized solar offers and incentives.
We serve MA, NH, CT, RI, ME, VT, NJ, PA, and TX
Loading NuWatt Energy...
The residential solar tax credit (25D) expired, but income-eligible households can still go solar and electrify heating for near zero out-of-pocket cost. The secret? Stacking -- combining Section 48 TPO solar, state heat pump rebates, weatherization programs, and utility bill credits into one powerful package.
Incentive stacking is the strategy of layering multiple independent programs to dramatically reduce -- or eliminate -- the cost of solar panels and heat pumps. Each program addresses a different piece of the puzzle, and because they come from different funding sources (federal, state, utility, municipal), they can all be claimed simultaneously.
A financing company installs solar on your roof and claims the 30%+ federal ITC. You pay $0 upfront and get lower electricity costs from day one. Available for projects beginning construction before July 4, 2026.
States offer income-tiered rebates for heat pump installations. In RI, income-eligible households can get 100% covered (max $18,000). In MA, Mass Save offers up to $10,000. In ME, Efficiency Maine provides up to $9,000.
Federal WAP and state programs provide free energy audits, air sealing, insulation, and duct sealing. These reduce your energy load before solar + heat pump installation, maximizing savings.
Net metering, SMART payments, ConnectedSolutions demand response, REG payments, and other utility programs generate ongoing bill credits that stack on top of your solar + heat pump savings.
With 25D expired, cash and loan buyers face the full cost of solar with no federal help. But income-eligible households actually have more pathways than ever: Section 48 TPO provides the federal benefit through a different legal mechanism, state heat pump programs have expanded budgets, and weatherization funding remains robust. The key is knowing which programs exist in your state and applying for them in the right order.
Here is what a typical income-eligible stacking scenario looks like for a Massachusetts household installing a 8 kW solar system + 2-zone heat pump:
* Example assumes income-eligible household in Massachusetts. Actual savings vary by state, income level, system size, and program availability. SMART and ConnectedSolutions payments are ongoing annual credits.
NuWatt serves 9 states across the Northeast and Texas. Here is what income-eligible households can stack in each state.
Mass Save no-cost home energy assessment, air sealing, and insulation for income-eligible households
Efficiency Maine Home Energy Savings Program for income-eligible households
Energize CT Home Energy Solutions (HES) for income-eligible households -- free/reduced cost
NJ Comfort Partners program for income-eligible households -- free weatherization
PA Weatherization Assistance Program (WAP) for households at or below 200% FPL
Efficiency Vermont + community action agencies provide free weatherization
Income eligibility thresholds vary by state and program, but most follow the federal Area Median Income (AMI) framework. Understanding your tier determines which enhanced rebates you can access.
| Income Tier | Typical Threshold | Benefit Level |
|---|---|---|
| Low-Income | 0-80% AMI | Maximum rebates |
| Moderate-Income | 80-150% AMI | Enhanced rebates |
| Standard | Above 150% AMI | Base incentives only |
Most programs use household income -- the combined gross income of all adults living in the home. Some states use adjusted gross income (AGI) from your most recent tax return, while others use current income documentation. Household size matters: a family of 4 has higher AMI thresholds than a single person. Check your specific state program for exact documentation requirements.
The order matters. Follow these steps to maximize your stacking potential and avoid leaving money on the table.
Start by determining your AMI tier. Use your state energy office website or call 211 for referrals. Many states have online screening tools that take 5 minutes. If you receive SNAP, TANF, Medicaid, or LIHEAP, you likely auto-qualify for enhanced tiers.
Contact your state weatherization program or utility company for a no-cost home energy assessment. This identifies air leaks, insulation gaps, and efficiency opportunities. In many states, income-eligible households get free air sealing and insulation as part of the assessment.
Apply for your state heat pump rebate program before installation. Many programs require pre-approval. Income-eligible rebates can cover 60-100% of heat pump costs. Get contractor quotes and submit your application with income documentation.
Contact NuWatt for a $0-down Section 48 TPO or Propel solar quote. The financing company claims the federal ITC, so you do not need any tax liability. Your monthly payment is typically 20-40% less than your current electric bill. Projects must begin construction before July 4, 2026.
After solar and heat pump installation, enroll in additional utility programs: net metering, SMART (MA), ConnectedSolutions (MA/RI), REG (RI), or demand response programs. These generate ongoing bill credits and cash payments that compound your savings year after year.
File for property tax exemptions on your solar equipment (available in most NuWatt states). Verify your purchase was sales-tax exempt. These passive savings add up to hundreds of dollars annually without any ongoing effort.
Several key programs have firm deadlines. Missing them means losing thousands in potential savings.
Projects must begin construction before this date to claim the federal Investment Tax Credit. After July 4, TPO/lease pricing will increase significantly.
Most state programs operate on a first-come, first-served basis with annual budget caps. When funds run out, the program pauses until the next fiscal year.
The CT Green Bank Smart-E low-interest loan program is currently authorized through March 31, 2026. Extension is possible but not guaranteed.
Federal WAP funding is distributed through state agencies. Wait lists vary by state -- some have 3-6 month backlogs. Apply early.
Better approach: Section 25D expired December 31, 2025. Do not plan around a tax credit that no longer exists. Section 48 TPO is the replacement pathway -- it works through third-party ownership, not a personal tax credit.
Better approach: Many heat pump programs require a pre-installation energy assessment. If you install solar first, you may miss weatherization benefits that reduce your heating load and right-size your heat pump system.
Better approach: AMI thresholds are more generous than many people expect. A family of 4 earning $80,000-$100,000 may still qualify for enhanced rebates in many metro areas. Always check -- you might be pleasantly surprised.
Better approach: The July 4, 2026 deadline is for construction commencement, not just signing a contract. Engineering, permitting, and utility interconnection take 2-4 months. Start the process by spring 2026 at the latest.
Better approach: Programs like ConnectedSolutions (MA/RI) pay $225-$275/kW annually for battery participation. If you are adding a battery with your solar system, this is free money many homeowners miss.
In states with strong incentive stacking (MA, RI, ME), income-eligible households can combine Section 48 TPO/lease solar ($0 down) with state heat pump rebates covering 60-100% of installation cost, plus free weatherization. Your remaining costs may be near zero depending on your state and income level.
Section 25D expired on December 31, 2025. Homeowners can no longer claim a federal tax credit for solar. However, Section 48 still allows third-party owners (TPO/lease companies) to claim the commercial ITC and pass savings to you as lower monthly payments or $0-down financing.
Thresholds vary by state but generally follow these tiers: households at or below 80% Area Median Income (AMI) qualify for maximum rebates, 80-150% AMI qualifies for moderate enhanced rebates, and above 150% AMI receives standard (non-income-eligible) incentives.
Yes. Section 48 TPO solar does not count as a "rebate" to the homeowner -- the financing company claims the federal credit. State heat pump rebates, weatherization programs, and utility bill credits are separate programs that stack on top. You can legitimately combine all of them.
For solar TPO/lease, you typically need to own the home or have landlord authorization. For heat pump rebates and weatherization, programs vary -- some serve renters through landlord partnerships. Contact your state energy office for specific eligibility rules.
Projects must begin construction before July 4, 2026 to qualify for the Section 48 Investment Tax Credit. After that date, the ITC is eliminated under OBBBA. If you are considering $0-down solar, act before spring 2026 to ensure your project qualifies.
NuWatt helps income-eligible households navigate the stacking process in all 9 states we serve. Get a free assessment to find out which programs you qualify for and how much you can save.