title: "Going Solar on a Modest Budget in North Carolina" summary: "A retired couple in Raleigh installs a right-sized 5 kW solar system to cut bills without overextending their fixed-income budget." storyType: solar state: NC savingsMonthly: 75 systemSize: "5.0 kW" date: "2026-03-01" tags:
- solar
- north-carolina
- retirement
- budget
- fixed-income
Starting Point
We're both retired, living on Social Security and a modest pension in our paid-off 1,400 sq ft ranch home in Raleigh, NC. Our Duke Energy bill averaged $135/month ($1,620/year). On a fixed income, every dollar matters — and electricity rates had been increasing 4-5% annually.
We couldn't afford a large solar system, but we could afford a right-sized one.
Why We Chose a Smaller System
Many solar companies wanted to sell us an 8-10 kW system that would cover 100% of our usage. The cost: $20,000–$25,000 before incentives. Even with financing, the monthly payment would have exceeded our current electricity bill for the first several years.
Instead, we targeted 80% offset — covering the bulk of our consumption while keeping costs manageable.
Our 5 kW System
| Component | Detail | |---|---| | Panels | 12 × Canadian Solar 415W | | Inverter | Enphase IQ8M microinverters | | Mounting | Roof-mount (south-facing, 25° pitch) | | Monitoring | Enphase Enlighten app | | Estimated annual production | ~7,200 kWh |
Why Microinverters
Our roof has a chimney that causes partial shade on 3 panels during morning hours. Microinverters let each panel operate independently — the shaded panels don't drag down the rest.
The Numbers
Costs
| Item | Amount | |------|-----:| | 5 kW system installed | $14,500 | | Federal 30% tax credit | -$4,350 | | Duke Energy rebate | -$500 | | Net cost | $9,650 |
We paid cash from savings. No monthly payment.
Tax Credit Strategy
Our federal tax liability was approximately $3,000/year. Since the 30% credit ($4,350) exceeded our annual tax liability, we applied $3,000 in year one and carried forward $1,350 to year two. The IRS allows unlimited carryforward for the residential clean energy credit.
First Year Results
Production
Total first-year production: 7,340 kWh (102% of estimate — slightly above projections).
Monthly Bill Impact
| Month | Before | After | Savings | |:-:|:-:|:-:|:-:| | Jan | $105 | $60 | $45 | | Feb | $95 | $48 | $47 | | Mar | $110 | $32 | $78 | | Apr | $120 | $18 | $102 | | May | $140 | $15 | $125 | | Jun | $175 | $48 | $127 | | Jul | $195 | $68 | $127 | | Aug | $185 | $55 | $130 | | Sep | $155 | $38 | $117 | | Oct | $125 | $22 | $103 | | Nov | $110 | $42 | $68 | | Dec | $100 | $55 | $45 | | Total | $1,615 | $501 | $1,114 |
Average monthly savings: $93 (better than projected because of strong shoulder-season production).
NC's net metering (1:1 credit for exports) was critical — excess spring/fall production offsets summer AC costs.
Simple Payback
At $1,114/year savings on a $9,650 net investment: payback in 8.7 years.
If Duke Energy rates increase 4%/year (consistent with recent trends), the effective payback is under 8 years. The system will produce electricity for 25+ years.
What Helped Us Decide
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Right-sizing removed the financial stress. A 5 kW system at $9,650 net felt manageable. A $15,000+ net system would have given us anxiety.
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No financing costs. Paying cash meant our savings started day one with no loan interest eroding the return.
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Hedge against rate increases. On a fixed income, unpredictable rate increases are the enemy. Solar makes our biggest variable cost more predictable.
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The monitoring app. We check the Enphase app daily. Seeing our panels produce power is genuinely satisfying — and it makes us more aware of our consumption habits.
Things We'd Tell Other Retirees
- You don't need to cover 100%. An 80% offset system can pay back faster because the cost per watt is often lower on smaller systems (less complexity).
- Understand the tax credit carryforward. If your tax liability is low, you can still use the full credit — it just might take two tax years.
- Get at least three quotes. Our prices ranged from $2.80/W to $3.50/W for essentially the same components. We went with $2.90/W.
- Don't skip the roof assessment. Our installer confirmed our 15-year-old architectural shingles had another 10+ years of life. If the roof needs replacement soon, do that first.
- Ask about panel-level monitoring. We can see exactly what each panel produces. When one panel underperformed, we noticed right away (turned out a squirrel had dragged a leaf on it — easy fix).