How Does Solar Work With Gainesville Regional Utilities (GRU)?
Short answer: your system connects to the grid through GRU’s own interconnection process, and what you are credited for exported energy is set by GRU rather than by a single statewide rate.
Quick answer: Going solar on GRU service normally means a local building and electrical permit, a local inspection, an interconnection application with GRU, a meter change, and then written permission to operate before the system can legally be switched on.
Gainesville Regional Utilities (GRU) serves Gainesville and parts of Alachua County. It is a municipal (city-owned) utility. GRU is city-owned and has a long history with distributed solar, but its programs are set locally and have changed more than once, so current terms should always be confirmed. This matters more than most homeowners expect. Rule 25-6.065, the Florida Public Service Commission rule that governs net metering, applies to investor-owned utilities. Municipal utilities are not bound by the bulk of it and set their own credit terms, system size caps and application requirements.
The GRU sequence, step by step
| Step | What happens | Who handles it |
|---|---|---|
| 1. Design and engineering | Plans drawn to your roof, wind-load zone and electrical service, sealed where the jurisdiction requires it | Installer |
| 2. Local permit | Building and electrical permit submitted to your city or county | Installer, on your behalf |
| 3. Interconnection application | Application and single-line diagram submitted to GRU | Installer, on your behalf |
| 4. Installation | Physical install of the array, racking, inverter and wiring | Installer |
| 5. Inspection | Local inspector verifies the work matches the approved plans | Building department |
| 6. Meter and permission to operate | Meter exchanged if required, then GRU issues written permission to operate | GRU, coordinated by installer |
What to check before you sign anything
- Confirm who actually serves the address. Service territory boundaries in Florida rarely follow city limits, and neighbouring streets are sometimes on different utilities entirely. The utility on your bill is the one that matters, not the city you live in.
- Ask what the export credit actually is. GRU sets its own terms, and they can differ substantially from what an FPL or Duke customer would be quoted. Any installer modelling your savings should be using GRU’s current terms, not a statewide average.
- Check whether there is a size cap or a queue. Some utilities cap system size relative to your historical consumption, and some run programme caps that fill up. Both change what is worth installing.
- Get the timeline in writing. Permitting and interconnection are almost always longer than the installation itself. A realistic schedule should show both separately.
- Do not switch the system on early. Operating in parallel with the grid before the utility authorises it can void agreements and, in some cases, create a safety hazard for line crews.
What we handle for you
We prepare the engineered plans, pull the local permit, submit the GRU interconnection paperwork, meet the inspector and follow the approval through to permission to operate, so you are not managing a building department and a utility at the same time.
See what solar and battery storage would actually do for your home
We will pull your last 12 months of utility data, model your real consumption, and show you exactly what a system would cost and produce — no obligation, no pressure.
Frequently asked questions
Do I need GRU’s approval to install solar?
Yes. Any system that can operate in parallel with the grid needs an approved interconnection agreement with GRU before it is energised, in addition to your local building permit.
Who sets the credit for energy I export to the grid?
GRU is a municipal (city-owned) utility, so it sets its own terms. The statewide rule that governs investor-owned utilities does not bind it, and the credit can differ from what an FPL or Duke customer receives.
How long does the GRU process take?
It varies, and it is normally the longest part of the project rather than the installation. We give you a schedule that separates permitting, installation, inspection and utility approval so you can see where the time actually goes.
Does my installer handle the GRU paperwork?
Yes. We complete and submit the interconnection application, the single-line diagram and the supporting documents, and we track it through to approval.
Am I definitely a GRU customer?
Check the provider name on your most recent electric bill. GRU serves Gainesville and parts of Alachua County, but boundaries are irregular and neighbouring properties are sometimes served by a different utility.