Independent Solar Advisor • Updated July 2026

Solar Panels in
South Carolina

Not in South Carolina?

South Carolina holds the largest state solar tax credit left in America: 25% of system cost, claimable at up to $3,500 a year with a 10-year carryforward. When Washington's credit died in December 2025, Columbia's kept working. The other half of the story is newer: 2026 moved Palmetto State solar onto time-of-use Solar Choice rates that reward design and punish defaults. EcoGen America handles both halves honestly.

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South Carolina Solar Report

Get your feasibility score, cost estimate & installer matches.

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For backup or TOU shifting
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State Tax Credit 25%, Biggest Left in U.S.
How It Pays $3,500/Yr, 10-Yr Carryover
New for 2026 TOU Solar Choice Rates
Incentive Strength
Fair Price Range $2.55 – $3.25/W
About EcoGen America

The 25% Credit Washington Could Not Kill.

South Carolina’s solar tax credit pays 25% of total system cost, capped at $3,500 per year with unused amounts carrying forward for 10 years. On a typical system that is the full quarter of the price back, collected across a few tax cycles, the most valuable state credit still standing anywhere.

The 2026 change is structural: new Duke and Dominion solar customers pair with Solar Choice time-of-use rates, where power prices swing by hour and exported surplus settles near avoided cost.

TOU is not a penalty; it is a design brief. Systems built for the schedule, with west-facing capacity or storage where the math supports it, keep the credit’s economics intact.

EcoGen America models your quote under the actual rate schedule, sequences the credit paperwork, and matches you with installers who design for both.

Our vetting process

Palmetto Network

Installers working Duke and Dominion interconnections weekly, licensed in South Carolina.

Quote Analysis

Built-in checks for credit math misquoted, TOU schedules ignored and dead federal-credit lines.

Carryforward-Correct Numbers

The 25% arrives over years via the $3,500 cap. We model the actual cash timeline, not a fantasy lump sum.

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Your information goes only to the installers you choose to hear from. Nothing is resold.

Collecting the 25%: How the Carryforward Actually Pays

The credit is generous and slow, by design. A worked example on a $20,000 system:

The Piece
The Number
What It Means
Total credit earned
$5,000 (25% of $20,000)
A full quarter of the system price returns via state taxes
Annual claim cap
$3,500 per tax year
The $5,000 arrives across two filings, not one
Carryforward window
10 years
Modest tax bills still collect everything eventually; patience is paid
Credit mechanics per South Carolina statute as of July 2026; your own tax liability sets the claim pace, model it with your preparer.

The design implication: South Carolina”s credit rewards owners who stay put and file patiently. Financing that ignores the multi-year cash timeline misprices the deal in both directions.

Claim, Schedule, Shape: The Palmetto Order

1

Claim

The 25% credit is the anchor; get the paperwork right and model the $3,500-a-year pace against your actual tax bill.

2

Schedule

Know your Solar Choice TOU windows cold. When power is expensive decides what your panels are worth.

3

Shape

Design to the schedule: orientation, load shifting, and storage where it pencils. TOU rewards the deliberate.

Want the credit and schedule modeled together?

Free 15-minute call. Carryforward pace, TOU windows, honest total.

Book a South Carolina Consult

Solar Choice: Designing for the Time-of-Use Era

The 2026 transition put new Palmetto solar on time-varying rates. Winning under them is a known playbook:

  • Peak windows set the prize: production and self-consumption during expensive evening hours carry outsized value; the rate schedule belongs inside the design software, not just the bill.
  • West-facing capacity earns its second look, catching late-day sun when TOU prices spike, a genuine reversal of old south-only dogma.
  • Storage graduates from luxury to lever: shifting midday production into the peak window is exactly what TOU pays for.
  • Surplus still settles near avoided cost, so oversizing stays pointless; shaping beats sizing in the Solar Choice era.

Between the credit”s 25% and a schedule-aware design, South Carolina remains one of the Southeast”s strongest honest cases, it just stopped rewarding lazy quotes.

South Carolina Contract Checks

South Carolina Quotes: Four Palmetto Checks

A big credit plus new rates equals four careful reads.

Clause to verify: Ask for the year-by-year credit collection schedule based on your actual liability.
Clause to verify: Confirm the projection uses your actual TOU windows and shows peak-hour production explicitly.
Clause to verify: Compare production to usage and challenge overshoot; ask how the design serves the peak window.
Clause to verify: Strike any federal line; the state credit and TOU-aware design carry the honest case.
Verify your paperwork

Four checks, any Palmetto quote. Schedule-fluent installers pass them cold.

Check SC Price Fairness Model My Credit Timeline

South Carolina Installers Built for the TOU Era

Vetted for SC licensing, Duke and Dominion interconnection experience and complaint history.

ESD Solar

Verified Multi-State Installer
Why Recommended
  • Statewide Texas coverage across all four major TDU territories (Oncor, CenterPoint, AEP Texas, TNMP)
  • Operates through TDLR-licensed Electrical Contractor partners with multi-state experience
  • Active in DFW, Houston, San Antonio, and Austin metros
Warranty
25 Year (Workmanship)
Timeline
8-16 Weeks
Experience
1 Years
Service Area
Statewide Texas

South Coast Solar

Tesla Powerwall Certified Electrical Contractor
Why Recommended
  • New Orleans electrical contractor installing solar since 2008
  • Tesla Powerwall Certified for storm-season backup
  • Guaranteed leak-proof flashing protects every roof penetration
  • Factory-trained, nationally certified installers and electricians
Warranty
Guaranteed leak-proof flashing system
Timeline
Quoted per project
Experience
18 Years
Service Area
Greater New Orleans & SE Louisiana

Purelight Power

25-Yr Parts & Production 10-Yr Workmanship
Why Recommended
  • Leading installer in Oregon, Iowa and Montana by its own install count
  • First-year sold-production guarantee backs the estimate
  • Systems engineered for 130 mph wind and 50 mph hail
  • 10-year workmanship plus 25-year parts and production coverage
Warranty
25-yr parts & production warranty
Timeline
Quoted per project
Service Area
OR, MT, MN, NC, SC + more

When Palmetto Solar Should Pause

The honest holds, even with the country”s best remaining credit:

  • Little state tax liability and no patience. The credit pays through your tax bill over years; households owing very little collect very slowly.
  • Quotes modeled on flat rates. Solar Choice is time-of-use; a schedule-blind projection is wrong from line one.
  • Short-horizon owners. The 10-year carryforward rewards staying; a quick sale strands unclaimed credit.
  • Coastal roofs without wind-rated specs. Hurricane exposure is real from Hilton Head to Myrtle Beach; the mounting engineering matters.
  • Heavily shaded lots. No credit percentage rescues production that never happens.

Tax-paying households planning to stay put: a quarter of the system back plus TOU-aware design makes South Carolina the Southeast”s standout, on paper and in practice.

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1. Palmetto quote in hand?

Priced against the honest band with the credit timeline and TOU schedule modeled.

OR

2. Want the credit pace computed first?

15 minutes, independent. Carryforward, TOU, verdict.

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South Carolina Solar FAQs

How does the South Carolina solar tax credit work?

It pays 25% of total system cost against your state taxes, capped at $3,500 per year, with unused credit carrying forward up to 10 years.

On a typical system the full quarter comes back across two or three filings, the most valuable state credit remaining in the country.

What is Solar Choice in South Carolina?

The successor rate structure for new Duke and Dominion solar customers: time-of-use pricing where power costs vary by hour and exported surplus settles near avoided cost.

Systems designed for the schedule, west-facing capacity, load shifting, storage where it pencils, keep strong economics.

Is solar worth it in South Carolina after the federal credit ended?

Yes, unusually so: the 25% state credit replaces most of what the federal credit did, and no other state offers anything close.

The projects that disappoint are schedule-blind designs and households with too little tax liability to collect at a satisfying pace.

What does Duke or Dominion pay for exported solar in SC?

Monthly surplus settles near avoided cost under Solar Choice, a few cents per kilowatt-hour, which makes oversizing pointless.

The value lives in self-consumption during expensive TOU windows, which is a design question your installer should answer explicitly.

Do coastal South Carolina homes need special solar equipment?

Wind-rated mounting and corrosion-aware hardware, yes: hurricane exposure runs the length of the coast.

Ask for the wind-load engineering in writing; established Palmetto installers provide it without friction.