Duke Energy Solar Overview
Duke Energy is one of the largest utilities in the U.S., serving customers in North Carolina, South Carolina, Florida, Indiana, Ohio, and Kentucky. Solar policies vary significantly by state, so your experience depends on where you live.
Customers: 8.2 million
Net metering: Available (varies by state)
Interconnection time: 30-90 days typical
Solar rating: ⭐⭐⭐ Good (state-dependent) (Source: utility tariff filings and DSIRE Database)
Duke has historically been lukewarm on rooftop solar, but policies have improved in recent years due to state regulations. North Carolina customers generally have the best experience.
Net Metering by State
Duke Energy's net metering policies are set by state regulators, so they vary:
| State | Net Metering Type | Credit Rate | System Limit | Rollover |
|---|---|---|---|---|
| North Carolina | Net metering | Full retail rate | 25 kW residential | Monthly, annual true-up |
| South Carolina | Net metering | Full retail rate | 20 kW residential | Monthly rollover |
| Florida | Net metering | Full retail rate | 10 kW residential | Monthly, annual payout |
| Indiana | Net metering (legacy) | ~$0.04/kWh excess | 10 kW residential | Monthly |
| Ohio | Net metering | Full retail rate | 25 kW residential | Monthly rollover |
| Kentucky | Net metering | Avoided cost (~$0.03-0.05) | 30 kW residential | Monthly |
Duke Energy Electric Rates
Your savings from solar depend on what you currently pay Duke for electricity:
| State | Average Rate | Rate Structure | Solar Savings Potential |
|---|---|---|---|
| North Carolina | $0.12-$0.14/kWh | Tiered | $1,200-1,600/year (7kW) |
| South Carolina | $0.13-$0.15/kWh | Tiered | $1,300-1,700/year (7kW) |
| Florida | $0.13-$0.16/kWh | Tiered + demand | $1,400-1,900/year (7kW) |
| Indiana | $0.14-$0.17/kWh | Flat/Tiered | $1,100-1,400/year (7kW) |
| Ohio | $0.12-$0.15/kWh | Flat | $1,000-1,300/year (7kW) |
| Kentucky | $0.11-$0.13/kWh | Flat | $900-1,200/year (7kW) |
Time-of-Use Rates
Duke offers optional time-of-use (TOU) rates in some states. These can benefit solar customers with batteries who can shift usage to off-peak times and export during peak times.
Interconnection Process
Getting your solar system connected to Duke's grid involves several steps:
Step-by-Step Timeline
| Step | Timeline | What Happens |
|---|---|---|
| 1. Application | Day 1 | Installer submits interconnection application |
| 2. Duke Review | 10-20 business days | Duke reviews system design and grid capacity |
| 3. Approval | 1-5 days after review | Duke issues approval to install |
| 4. Installation | 1-3 days | Installer completes physical installation |
| 5. Inspection | 5-10 days | City/county inspection |
| 6. Meter Install | 5-15 business days | Duke installs net meter |
| 7. PTO | 1-5 days | Permission to Operate granted |
Total typical timeline: 30-60 days from application to Permission to Operate (PTO). Can be longer in busy periods or if grid upgrades are needed.
Duke Energy Solar Programs
Programs by State
North Carolina
- NC Solar Rebate: Occasionally offered, check current availability
- Duke Energy Carolinas vs. Progress: Same parent company, slightly different programs
Florida
- Duke Energy Florida: Net metering available but watch for policy changes
- No state incentives: Florida has no state tax credit or rebate
Indiana
- Net metering phase-out: New customers get lower export rates
- Duke Indiana: Less solar-friendly than other Duke territories
Ohio
- Duke Energy Ohio: Good net metering, competitive market
- Green Source Rider: Optional renewable energy program
Battery Programs
Duke has piloted battery programs in some states, offering incentives for customers with home batteries to participate in demand response. Check current availability in your area.
Tips for Duke Energy Customers
Do This:
- Size for 100% offset: Duke's net metering makes full offset valuable
- Get your rate schedule: Know exactly which rate you're on before going solar
- Ask about TOU: Time-of-use rates + battery can maximize savings
- Check interconnection queue: Ask installer about current wait times
- Go sooner rather than later: Net metering policies can change
Watch Out For:
- System size limits: Florida has 10kW limit, may restrict larger homes
- Indiana export rates: Much lower than retail, affects ROI
- Interconnection delays: Build 60-90 days into your timeline
- Policy changes: Duke has lobbied against net metering in some states
Frequently Asked Questions
Does Duke Energy offer solar rebates?
Duke occasionally offers rebates in specific states, but they're not consistent. The federal incentive (for PPA/lease) is typically the main incentive. Check with installers about current Duke programs in your state.
How long does Duke take to approve solar?
Duke's interconnection review typically takes 10-20 business days, with total time from application to Permission to Operate (PTO) averaging 30-60 days. Complex installations or busy periods can take longer.
Can I sell excess solar back to Duke?
Yes, through net metering. In most Duke states, excess energy credits roll over monthly. At the annual true-up (usually April), excess credits are paid out at avoided cost rates or forfeited, depending on your state.
Is Duke Energy good for solar?
Duke is decent for solar, especially in North Carolina, South Carolina, Ohio, and Florida. Indiana and Kentucky have less favorable policies. Overall rating: ⭐⭐⭐ (3/5).
What size solar system can I install with Duke?
System size limits vary by state: NC (25kW), SC (20kW), FL (10kW), IN (10kW), OH (25kW), KY (30kW). Most residential systems are 5-12kW, so limits rarely matter except in Florida.
Questions About Solar with Duke Energy?
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