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We use your location to provide localized solar offers and incentives.
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.
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7-14 panels (3-6 kW) depending on your heat pump type and climate zone. Here is the exact math.
The average heat pump uses 3,000-6,000 kWh per year. To offset that with solar, you need 7-14 additional panels (3-6 kW of solar capacity).
10-14 panels for a ducted system. Heavy winter heating loads require more capacity. 4.2 peak sun hours.
7-10 panels for a ducted system. Higher sun hours and lighter heating loads mean fewer panels needed. 5.0 peak sun hours.
The first step is knowing how much electricity your heat pump uses. This varies dramatically by type and climate.
One indoor unit serving a single room or zone. Most efficient option per BTU.
Solar needed: 4-3 panels (1.8 kW avg)
Multiple indoor units connected to one outdoor condenser. Serves multiple rooms.
Solar needed: 7-6 panels (3.1 kW avg)
Whole-home heating and cooling through existing ductwork. Most common upgrade from gas/oil furnace.
Solar needed: 9-8 panels (4.0 kW avg)
Large-home ducted system. Common in 2,500+ sq ft homes with high heating loads.
Solar needed: 11-9 panels (4.4 kW avg)
Number of Solar Panels =
Annual kWh ÷ (Sun Hours × 365 × Panel Watts × 0.85)
Your heat pump's yearly consumption (check your utility bill or manufacturer specs)
Average daily peak sun hours for your location (NE: 4.2, Mid-Atlantic: 4.5, TX: 5.0)
Wattage of each panel (standard 2026 panels: 440W)
Real-world losses: temperature, wiring, inverter, shading, soiling (~15% total)
Given:
Calculation:
4,500 ÷ (4.2 × 365 × 0.440 × 0.85)
= 4,500 ÷ 573.5
= 7.8 → 8 panels (3.5 kW)
Financial Analysis:
~$11,200
~$1,485/yr
~7.5 years
~$42,000+
Based on MA rate $0.33/kWh, 4% annual rate increase, $3.20/W solar cost, no federal credit.
Your climate zone determines both how much energy your heat pump uses and how much solar energy you can produce.
Heavy (60-70% of HP energy)
Moderate (30-40%)
10-14 panels
8-10 panels
Moderate (50-55%)
Moderate (45-50%)
9-12 panels
7-9 panels
Light (20-30%)
Heavy (70-80%)
7-10 panels
6-8 panels
A heat pump replaces your furnace/boiler and runs on electricity. Solar panels generate that electricity for free. Together, they eliminate both your heating fuel bill and your electric bill increase.
$0
Net HP operating cost with solar offset
$2,000-$4,000
Annual savings (fuel + electricity)
25+ years
Of free heating, cooling, and power
| Category | Oil Boiler (Status Quo) | Heat Pump + Solar |
|---|---|---|
| Annual heating fuel | $2,500-$4,000 (oil) | $0 (solar-powered) |
| Annual electricity increase | $0 (no change) | $0 (solar offset) |
| Equipment lifespan | 15-20 years | HP: 15-20yr, Solar: 25-30yr |
| 25yr total cost | $75,000-$120,000 | $25,000-$35,000 (upfront only) |
| Net 25yr savings | — | $50,000-$85,000+ |
Assumes NE homeowner switching from oil heat. Oil at $4.00/gal, 4% annual increase. Solar at $3.20/W, no federal credit. Heat pump installed cost $12,000-$18,000.
The challenge: Heat pumps use the most energy in January-February when solar production is at its lowest. But on an annual net basis, summer overproduction offsets winter underproduction.
Solar: Producing 140-160% of daily needs
Heat pump: Cooling mode, moderate usage
Net: Large excess sent to grid for credits
Solar: Producing 40-60% of daily needs
Heat pump: Heating mode, heavy usage
Net: Using summer credits to offset winter deficit
How it works: In states with net metering (MA, CT, RI, NJ, NH, ME, VT, PA), excess summer solar production generates bill credits that carry forward to offset winter heat pump consumption. This is why we size your system for annual production, not daily or monthly — the grid acts as your seasonal battery.
| Heat Pump | kWh/yr | NE (4.2 hrs) | Mid-Atlantic (4.5 hrs) | TX (5.0 hrs) | Solar Cost* |
|---|---|---|---|---|---|
| Single-zone mini-split | ~2,000 | 4 panels | 4 panels | 3 panels | $5,200-$7,000 |
| Multi-zone (3-head) | ~4,000 | 7 panels | 7 panels | 6 panels | $9,200-$13,200 |
| Ducted 3-ton | ~5,000 | 9 panels | 9 panels | 8 panels | $11,400-$16,700 |
| Ducted 5-ton | ~6,500 | 12 panels | 11 panels | 10 panels | $14,500-$20,000 |
*Solar cost range based on $2.80-$3.20/W. No federal credit. Using 440W panels at 85% system efficiency. Panel count rounded up.
Each state has different incentives, utility rates, and climate considerations. See your state's detailed guide.
SMART 3.0 + Mass Save HP rebates
Energize CT + RRES net metering
Clean Heat RI + REF/REG solar
NHSaves + NEM 2.0 credits
Efficiency Maine + net billing
NJ Whole Home + ADI solar
Efficiency VT + GMP net metering
Act 129 rebates + SRECs
Utility rebates + solar buyback
Get a personalized estimate for solar panels to power your heat pump. Our calculator accounts for your climate zone, usage, and local incentives.