Gainesville Regional Utilities (GRU) Solar & Net Metering Guide
Last updated: July 13, 2026 by Goldin Solar
Gainesville Regional Utilities (GRU) is the municipal utility serving Gainesville and surrounding Alachua County areas. GRU has a uniquely interesting solar history: it was the first U.S. utility to launch a Feed-In Tariff (FIT) program in 2009, and that legacy still shapes how Gainesville-area solar gets discussed today. The current program (post-FIT) operates as a traditional net metering arrangement, but the customer base in Gainesville is unusually well-informed about utility-specific tariff economics — and your installer should be too.
Who GRU serves
GRU serves:
– The City of Gainesville
– Portions of unincorporated Alachua County
GRU is not FPL or Duke. Your meter swap, net metering tariff, and PTO process all run through GRU directly.
GRU’s solar history: the FIT legacy
GRU launched its Feed-In Tariff (FIT) program in 2009 — the first of its kind in the United States. Under the FIT, GRU paid a premium per kWh for solar-generated electricity sold to the grid. This made Gainesville one of the first major distributed-solar markets in the U.S.
The FIT closed to new applicants in 2014. Customers who joined under the FIT have 20-year contracts at their original rate; those contracts will start expiring in 2029-2034. New residential solar customers in Gainesville are NOT eligible for the FIT.
The current GRU residential solar program is a standard net metering arrangement, similar in structure to other Florida muni utility programs.
GRU solar program: 2024 change — fuel-adjustment rate for new installs
IMPORTANT — 2024 policy change: The GRU Authority Board voted on April 17, 2024 to end retail-rate net metering for new solar customers. Effective April 18, 2024:
– New solar installs (post-April 17, 2024): Exported energy credited at GRU’s fuel adjustment rate — significantly below the retail rate (~12.5¢/kWh as of 2026). The fuel adjustment rate is a small fraction of retail; economics are substantially reduced vs. full NEM.
– Pre-April-18-2024 grandfathered systems: Retain original net metering credit terms; those customers are not directly affected.
– FIT customers (pre-2014): Continue under their 20-year contracts at the original Feed-In Tariff premium rate.
This places GRU alongside JEA and KUA as Florida muni utilities where solar export economics are materially less favorable than for FPL/Duke/TECO customers.
For any new GRU-territory solar quote, we model the actual fuel-adjustment-rate economics — not retail-rate assumptions.
- System size: Typically sized to historical usage; confirm current cap with GRU
- Bill credit for exports: GRU fuel adjustment rate (well below retail 12.5¢/kWh)
- Annual true-up: Any remaining fuel-adjustment credits reset at year-end
- Interconnection application: Required before installation
- PTO process: GRU-managed; bidirectional meter installed after final inspection
What makes GRU different from FPL
- History matters. Gainesville customers who joined the FIT have a uniquely good deal that doesn’t apply to new applicants. Don’t quote a new customer using FIT-era assumptions.
- GRU customer base is unusually informed. Decades of distributed-solar conversation in Gainesville mean customers ask sophisticated questions about tariff economics, export rates, and battery-related interconnection. We answer with specifics.
- Tariff is muni-controlled. GRU’s net metering tariff is set by city authority, not the Florida Public Service Commission. Changes happen on a different cadence than investor-owned utility tariff changes.
- University of Florida proximity. Many GRU residential customers are UF faculty, students, and staff. The conversation tends toward technical specifics — efficiency curves, degradation rates, panel-level optimization — not generic sales pitches.
Permit + utility coordination for Gainesville customers
For a residential solar install in GRU territory, the typical flow is:
- Building permit (City of Gainesville Building Inspection Department, or Alachua County for unincorporated)
- GRU interconnection application — submitted in parallel
- HOA / ARC approval if applicable
- Installation after permit issuance
- Final inspection by the building department
- GRU meter swap after final inspection approval
- GRU PTO grant
Wind zone for Gainesville
For permitting context (separate from utility):
– Design wind speed: 130 mph (Vult) for Risk Category II residential per FBC 8th Edition / ASCE 7-22
– Hardware: Florida Product Approval (FPA) is sufficient
– Engineering: PE-sealed structural compliance letter
Gainesville is among the lower-wind-exposure jurisdictions in Florida.
Typical GRU timeline
| Stage | Typical days |
|---|---|
| Building permit + GRU application (parallel) | 14-30 |
| Installation execution | 1-2 days |
| Final inspection | 3-10 |
| GRU meter swap + PTO | 28-56 |
What we’ve learned working with GRU
- Customer education is half the conversation. Gainesville customers often want to talk about real engineering details — panel-level optimizer vs. string inverter trade-offs, NOCT vs. STC degradation, monitoring data granularity. We engage substantively, not with marketing language.
- The FIT legacy creates a generational gap. Long-time Gainesville solar customers have a frame of reference (FIT premium pricing) that doesn’t apply to new applicants. We’re upfront about that from the first conversation.
- Battery systems with GRU are interconnectable. PV+ESS interconnection requires additional documentation; we handle it as standard scope.
- Tariff timing matters. GRU tariff changes happen on a city-commission cadence, not a state-PSC cadence. We track GRU agendas for relevant tariff items.
- UF-area neighborhoods may have HOAs with their own ARC processes. Florida Statute §163.04 still applies — HOAs cannot prohibit solar. We handle the ARC packet.
Frequently asked questions
Can I still get on the GRU Feed-In Tariff (FIT)?
No — the FIT closed to new applicants in 2014. Customers under the original FIT have 20-year contracts at the original premium rate, but new customers fall under standard net metering.
Is GRU net metering as good as FPL?
Different structure. We model your specific case against current GRU tariff terms.
Does GRU charge a monthly fee for net metering customers?
Read the current GRU tariff carefully. (contact GRU for current solar-customer charge structure)
What system size can I install?
Typically sized to historical usage, up to a defined cap. (size to historical usage; confirm current GRU cap)
Does GRU support battery + solar combinations?
Yes — PV+ESS systems are interconnectable with additional documentation.
Are there special considerations for UF-area rental properties?
The solar system stays with the property. Rental property owners can install solar; the bill structure depends on the rental agreement (master meter vs. tenant-paid).
Does Goldin Solar handle the full GRU interconnection application?
Yes — every Gainesville-area contract includes complete GRU application handling at no additional charge.
Can I install ground-mount solar on a larger Gainesville-area property?
Yes, with proper engineering. Larger unincorporated Alachua County parcels support ground-mount.
Talk to a Gainesville solar specialist
If you’re served by GRU and you want a substantive technical conversation with real numbers, give us a call.
Goldin Solar, LLC
Address: 1105 US Highway 1, Vero Beach, FL 32960
Phone: (855) 765-2730
License: CVC 57300
Get a free Gainesville solar quote
Related guides: Solar permits in Alachua County · FPL net metering (for comparison) · What happened to the GRU Feed-In Tariff? · Solar + battery backup with municipal utilities
Credentials
- Tesla Certified Installer (Solar + Powerwall)
- Sol-Ark Authorized Installer
- SolarEdge & Enphase certified
- Co-founder & CEO Joe Cataldo: BS Electrical Engineering (University of Florida)
- Florida licenses: CVC 57300 (Solar), EC1301385 (Electrical), CCC1331878 (Roofing)
- 3,000+ installations across Florida since 2014
- Office: 1105 US Highway 1, Vero Beach, FL 32960 · (855) 765-2730
Author + dates
- Author: Joe Cataldo, BS Electrical Engineering (University of Florida)
- Published: July 13, 2026
- Last reviewed: July 13, 2026
- Next review: every 6 months or sooner if the utility revises its tariff or program rules