SunCents Logo SunCents

Is Solar Worth It in St. Johns, Florida?

We analyzed Florida Power & Light (FPL) rate books, NREL irradiance data, and Florida tax codes to calculate the real ROI for homeowners in 32259.

Market Snapshot

Elec. Rate
$0.138/kWh
Sun Hours
5.42
Utility Florida Power & Light (FPL)
Tax Exempt Yes
Battery Optional

Analyst Note: The "4kW Benchmark"

The analysis below uses a standardized 4kW system to provide a fair baseline comparison across cities. However, the average electric bill in St. Johns is $172.5.

⚠️ Most homes here will need a larger system (8kW–12kW) to reach 100% offset. Use the calculator below for your exact numbers.

With average electric bills in St. Johns County hitting $172, many homeowners are tired of writing big checks to Florida Power & Light (FPL) every month. Rooftop solar offers a direct path to energy independence, locking in lower energy costs for decades. Given the region's strong sun exposure and Florida's solar-friendly tax exemptions, installing a system is more affordable and practical than ever.

Benchmark Cost Analysis

How Much Do Solar Panels Cost in St. Johns?

The upfront cost of going solar depends on whether you include a battery. While a solar-only system is cheaper, the battery system offers hurricane resilience and protects you from net metering changes.

  • Solar Only System (4 kW): The average gross cost is about $11,500. After the 30% federal tax credit, the net cost drops to around $8,050. This is the budget option, but you'll be exposed to low export rates.
  • Solar + Battery System: The recommended setup costs around $23,500 before incentives. The 30% tax credit applies to both panels and battery, bringing your final net cost down to approximately $16,450. This system provides blackout protection and ensures you use your own solar power instead of selling it cheap.

Incentives & Tax Credits

St. Johns Solar Incentives (2026)

Florida homeowners benefit from excellent financial incentives that significantly reduce the cost of a solar installation.

  • Federal Solar Tax Credit: A 30% federal ITC is the biggest incentive, directly reducing your federal tax liability. For a $23,500 solar and battery system, this is a $7,050 credit.
  • Property Tax Exemption: Installing solar panels increases your home's value, but thanks to Florida law, it will not increase your property taxes.
  • Sales Tax Exemption: All solar and battery equipment is 100% exempt from Florida's 6% state sales tax, saving you over a thousand dollars on the system cost.

Net Metering: Florida Power & Light (FPL)

Policy Status

Net Metering (HB 741 Modified 2024)

Battery Priority

Optional

FPL's Net Metering Policy in 2026

Florida's net metering rules have changed due to HB 741. While existing customers are grandfathered into older, more favorable rates, new solar installations in 2026 fall under a modified structure. Any excess power you send to FPL's grid is credited at a lower-than-retail rate. This change makes adding a home battery a very smart investment. By storing your excess solar power in a battery, you can use it during the evenings or cloudy days instead of selling it back to FPL for less, maximizing the value of every kilowatt-hour you generate.

Projected Savings

Potential Solar Savings in St. Johns

A typical 4 kW solar panel system in the St. Johns area can produce around 5,900 kWh of clean energy annually. Based on FPL's current average rate of $0.138/kWh, that translates to approximately $816 in electricity savings in the first year alone. As utility rates continue to climb, these savings will grow significantly over the 25+ year lifespan of the system, potentially saving you tens of thousands of dollars.

Local Questions Answered

Do solar panels work during a hurricane in St. Johns?
Solar panels themselves are typically rated to withstand hurricane-force winds (140mph+). However, if the grid goes down, a standard grid-tied solar system will shut off for safety. This is why a battery is critical for resilience—it allows you to use your stored solar power to keep your essential appliances running during a power outage.
What's the real payback period for a solar + battery system?
With a net cost of around $16,450 and first-year savings of $816, the simple payback appears to be around 20 years. However, this calculation doesn't account for FPL's inevitable rate hikes. With annual utility inflation of 3-5%, the actual payback period is often much shorter, typically in the 12-15 year range, while providing priceless energy security from day one.
How do I know if my roof is good for solar?
An ideal roof for solar in St. Johns faces south with minimal shading from trees or other buildings. However, east- and west-facing roofs also get great production. The best way to know for sure is to get a personalized analysis. Our calculator can provide an initial assessment based on your address.

Calculate Your Solar Savings

Enter your details below for a personalized estimate

Initializing Solar Engine...

* Calculations based on Florida Power & Light (FPL) residential rates (0.138/kWh).

Data Transparency & Methodology

Estimates for St. Johns, Florida are produced by the SunCents Solar Engine (v1.2). We combine the following verified or standard industry sources:

Performance (PV production)

NREL PVWatts — modeled annual and hourly AC output (kWh), solar radiation, and system losses for a standardized array size so cities can be compared fairly.

nrel.gov

Electricity rates (tariffs)

U.S. Energy Information Administration (EIA) — state-level average retail electricity prices ($/kWh) and supporting series for economic context.

eia.gov

Incentives & programs

DSIRE — state and local rebates, net metering, and policy programs (summarized for readability; always confirm eligibility with a tax or solar professional).

dsireusa.org

Federal tax credit (ITC)

Investment Tax Credit — federal residential solar credit (e.g. 30% of qualified costs where applicable); rules change with statute—verify with a qualified advisor.

energy.gov

Utilities & interconnection

Where shown, local utilities (e.g. APS, PG&E, FPL, and other IOUs or munis) are mapped from public interconnection, tariff, or service-territory references so net metering and rider rules match your area—not generic national averages.