Duke Energy Florida, LLC Rate Selection Guide
Duke Energy Florida, LLC is a regulated electric monopoly serving roughly 2 million customers in west-central and northern Florida. C&I customers access billing and usage data through the Business My Account portal, including 15-minute interval data for eligible business meters, but Duke Energy Florida offers no Green Button, no EDI, and no official API. Florida has no retail supplier choice.
Duke Energy Florida, LLC Rate Schedule Comparison
| Schedule | Type | Rate | Best For |
|---|---|---|---|
| GS-1 (Non-Demand) | electric | Customer charge + base energy + clauses; ~$218/mo all-in at 1,200 kWh (FPSC 2025) | Small commercial sites without meaningful peak demand |
| GSD-1 Demand | electric | Base + demand $/kW + energy + $/kW clauses; ~$23.4K/mo at 450 kW / 162 MWh (FPSC 2025) | Most C&I facilities 25-499 kW; peak-kW management is the key cost lever |
| GSDT-1 (TOU) | electric | GSD-1 with on/off-peak energy split | Demand customers who can shift load off-peak |
| LLC-1 / GSLD (Large Load) | electric | High customer charge + low ~$9.80/kW demand + ~1.04c/kWh energy (LLC-1) | 1,000 kW+ high-load-factor industrials at transmission voltage |
| Curtailable / Interruptible (CS / IS) | electric | GSD-1 charges reduced by curtailment/interruption credits | Large loads that can shed demand on request |
Market Overview
Florida is a fully regulated electric market with no retail choice. Duke Energy Florida is the exclusive provider in its territory, regulated by the Florida Public Service Commission. Customers cannot select an alternative supplier, and there is no competitive metering or billing.
Need to pull your actual usage data to compare rates? See the Duke Energy Florida, LLC Data Access Guide →
Current Rate Schedules
Duke Energy Florida (DEF) is a fully regulated investor-owned utility serving ~2 million customers under FPSC-approved tariffs. C&I customers are served on a tiered ladder by demand: GS-1 (non-demand), GSD-1 (general service demand, 25-499 kW), large-load schedules above 500 kW, plus optional time-of-use (GSDT-1), curtailable (CS), and interruptible (IS) schedules that trade firmness for lower charges. Demand-metered schedules bill on the maximum 30-minute kW demand during the month (power-factor adjusted), and demand classes recover most rider/clause costs on a $/kW rather than $/kWh basis. Base rates are governed by the 2024 multi-year settlement (2025-2027). Representative figures below are drawn from FPSC-filed DEF bill calculations and tariff sheets.
| Schedule | Type | Applicability | Structure | Rate |
|---|---|---|---|---|
| GS-1 General Service (Non-Demand) | electric | Small non-residential customers without significant metered demand; energy-only billing. Optional time-of-use variant GST-1 available. | Monthly customer (base) charge + non-fuel base energy charge per kWh + fuel, ECCR, CCR, ECRC, asset securitization and other clause factors per kWh. No demand charge. | Per FPSC 2025 bill calc, a GS-1 sample bill (1,200 kWh) totaled ~$218/mo all-in; blended effective ~14-15c/kWh at higher usage+ None |
| GSD-1 General Service Demand | electric | General service / industrial customers with measured demand of at least 25 kW and less than 500 kW (workhorse C&I schedule). Customers under 25 kW may opt in at a 25 kW minimum demand. | Monthly base/customer charge + base demand charge per kW of billing demand + non-fuel base energy charge per kWh + clause factors. Billing demand is the max 30-minute kW during the month, power-factor adjusted. Demand-class clause costs (ECCR, CCR, etc.) recovered on a $/kW basis. | Per FPSC 2025 DEF bill calc: 450 kW / 162,000 kWh sample totaled ~$23,384/mo (~14.4c/kWh all-in); 1,000 kW / 468,000 kWh totaled ~$64,536/mo+ Base demand charge per kW plus $/kW clause adders; e.g. ECCR ~$1.08/kW (secondary), $1.07 primary, $1.06 transmission (FPSC 2025 filing) |
| GSDT-1 General Service Demand (Time of Use) | electric | Optional time-of-use version of GSD-1 for demand customers who can shift load to off-peak periods. | Customer charge + demand charge + on-peak / off-peak differentiated energy charges + clause factors. Same 30-minute demand basis as GSD-1. | TOU energy differential vs flat GSD-1; structure-only (specific c/kWh per tariff sheet 6.180)+ Per kW of billing demand (see GSD-1 basis) |
| Large Load / High Load Factor (LLC-1, GSLD) | electric | Customers with billing demand of 1,000 kW or more; LLC-1 requires transmission service at 230 kV or higher. | High monthly customer charge + low per-kW demand charge + low non-fuel energy charge, rewarding high load factor. Billing demand subject to 90% of prior-11-month peak / 75% of contract / 1,000 kW floor (LLC-1). | LLC-1 example: customer charge ~$1,106.80/mo; non-fuel energy ~1.04c/kWh (tariff sheet 6.190); not eligible for ED-2 or CISR-1 riders+ LLC-1 ~$9.80/kW of billing demand (tariff sheet) |
| Curtailable Service (CS-2 / CS-3 / CST) | electric | Demand customers willing to curtail a fixed block of demand on Company request, in exchange for credits. | GSD-style charges reduced by curtailable demand credits; fixed curtailable demand commitment. TOU variants (CST-2/CST-3) available. Clause costs on $/kW basis (~$1.06/kW ECCR). | Bill credits scale with committed curtailable kW; structure-only+ Per kW with curtailment credit offset |
| Interruptible Service (IS-2 / IST-2) | electric | Large customers who accept full interruption of service on Company request for the deepest rate discount. | Lowest demand/energy charges among C&I classes in exchange for interruptible (non-firm) service; TOU variant IST-2. Standby service (SS-2) available for interruptible backup. | Discounted vs GSD-1; structure-only per interruptible tariff sheets+ Reduced per-kW demand charge reflecting interruptibility |
Rate Recommendations by Use Case
Multi-site C&I energy management
Track billing and 15-minute interval usage across business sites for cost analysis.
Business My Account consolidates multiple meters, exposes 15-minute interval data on eligible meters, and generates PDF load-profile reports; without an API, aggregators rely on manual PDF uploads.
- Enroll all sites in Business My Account with permissioned users
- Pull 15-minute interval data for demand analysis
- Use PDF reports for benchmarking across sites
Peak demand reduction
Identify and shave monthly demand peaks that drive demand charges.
Demand charges are a major C&I cost; 15-minute business interval data pinpoints peak windows for load management.
- Review 15-minute interval data to map peaks
- Stagger startups of large equipment
- Evaluate storage for peak shaving
Curtailable / interruptible load
Earn demand credits by accepting curtailment during system peaks.
Large industrial customers with curtailable load can take interruptible service in exchange for demand credits.
- Confirm curtailment obligations and notice requirements
- Model credits against curtailment risk to operations
- Automate load shedding for curtailment events
Bill auditing & benchmarking
Audit invoices and benchmark facilities despite the lack of automated data feeds.
With no EDI or API, customers export PDF bills and upload them to aggregators for benchmarking and error detection.
- Download PDF bills monthly from My Account
- Use Nectar's API for billing data analysis — see docs.nectarclimate.com
- Watch for billing errors and rate-schedule mismatches
Rate schedule selection
Match the rate schedule to your demand and load profile.
Choosing the right schedule (non-demand vs. demand vs. large/interruptible) can materially reduce costs since supplier choice is unavailable.
- Analyze load factor and peak demand
- Compare GS-1 vs. GSD-1 for borderline accounts
- Consult FPSC tariffs for eligibility
Historical Rate Trends
DEF base rates are set by the 2024 multi-year settlement approved by the FPSC in August 2024, covering 2025-2027. On top of base rates, annual clause adjustments (fuel, capacity, conservation, environmental, storm protection) reset rates each January and can move bills materially. The 2026 annual adjustment raises C&I bills modestly in Jan-Feb but then cuts them sharply in March when the hurricane Storm Cost Recovery charge rolls off.
August 22, 2024
FPSC approved DEF 2024 settlement: base rate increases of ~$203M in 2025 and ~$59M in 2026, with ~$50M federal tax credits offsetting a 2027 base increase; ~2% average annual residential bill increase over the term.
~2%/yr average (residential reference)January 1, 2026
2026 annual clause adjustment: C&I customers see bill increases of ~4.3% to 8.2% vs December 2025 in Jan-Feb 2026 (fuel, capacity, conservation, storm protection, environmental clauses).
+4.3% to +8.2% (Jan-Feb 2026 vs Dec 2025, C&I)March 1, 2026
Removal of Storm Cost Recovery charge cuts C&I bills ~9.6% to 15.8% vs February 2026.
-9.6% to -15.8% (March 2026 vs Feb 2026, C&I)Overall trend: stable
Next expected change: March 2026: removal of the Storm Cost Recovery charge (hurricanes Debby/Helene/Milton) cuts C&I bills 9.6%-15.8% vs February 2026; 2026 clause rates pending final FPSC approval. Settlement runs through 2027.
Cost Optimization Strategies
DEF C&I bills are dominated by the 30-minute peak demand charge and $/kW clause adders, so peak management, power factor, and schedule selection by load factor are the primary savings levers.
Peak demand (30-minute) management
For: GSD-1, GSDT-1, LLC-1, GSLD
Stagger equipment startups and shed load to lower the single highest 30-minute kW interval that sets the monthly billing demand on GSD-1 and large-load schedules.
Power factor correction
For: GSD-1, GSDT-1, LLC-1
Keep power factor high to avoid the upward power-factor adjustment DEF applies to billing demand.
Time-of-use load shifting
For: GSDT-1
Move flexible load to off-peak periods on GSDT-1 to capture lower off-peak energy charges.
Schedule selection by load factor / voltage
For: LLC-1, GSLD, GSD-1
High-load-factor sites at 1,000 kW+ can move to LLC-1/GSLD for a much lower per-kW demand charge; take transmission voltage where feasible.
Curtailable / interruptible enrollment
For: CS-2/CS-3, IS-2/IST-2
Enroll sheddable load in CS or IS schedules to earn curtailment/interruption credits against demand charges.
To implement these strategies, you need your 15-minute interval data. Learn how to download Duke Energy Florida, LLC interval data →
Frequently Asked Questions
How do business customers get interval data from Duke Energy Florida?▾
Log in to Business My Account (https://www.duke-energy.com/business/my-account?jur=FL01), open the Usage / Energy Data section, and select eligible meters to view 15-minute interval data, daily/monthly totals, peak demand, and PDF load-profile reports. Residential customers are limited to daily granularity.
Does Duke Energy Florida support Green Button?▾
No. Duke Energy Florida does not offer Green Button Download My Data or Connect My Data. As a regulated Florida monopoly, it has no competitive-market mandate and the FPSC does not require it as of 2026. Customers can only view data in the portal or export PDF bills.
Is EDI available for Duke Energy Florida?▾
No. EDI is not available in Florida. Duke Energy operates EDI programs only in deregulated jurisdictions such as Ohio. Florida is a regulated monopoly with no competitive suppliers, so there is no EDI or inter-utility data exchange.
Can a consultant access my Duke Energy Florida account?▾
Only in limited ways. There is no formal third-party data program. An Authorized Person can view balance and due date, and the Third-Party Notification program sends bill copies, but neither provides detailed consumption data. Consultants typically rely on customer-exported PDF bills.
Can I choose a different electricity supplier in Florida?▾
No. Florida is a fully regulated market with no retail choice. Duke Energy Florida is the exclusive provider in its territory under the Florida Public Service Commission, and customers cannot select an alternative supplier.
Is there an official API for Duke Energy Florida data?▾
No. There is no official developer portal or API. An unofficial library (pyduke-energy) and Home Assistant integrations exist but are deprecated/unsupported and may violate terms of service. A third-party rate API (kwcost) provides rate data but is not affiliated with Duke Energy.
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