What Actually Drives a Florida Power Bill
Cooling, water heating, pool pumps, and the quiet loads. Where the money in a Southwest Florida electric bill really goes, and which parts you can do something about.
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Short answer: Cooling first, by a wide margin — air conditioning was about 28% of total home site energy use in Florida in EIA's most recent residential survey. After that it's water heating, pool equipment, and the appliances that run continuously. Rate increases matter, but in most Southwest Florida homes a bill that jumped is a usage story or an equipment story before it's a rate story.
The ranking, roughly
Every house is different, but the order is stubbornly consistent in this climate.
- Air conditioning — the largest load in nearly every Southwest Florida home, and the one that grows fastest as equipment ages
- Water heating — usually second in a house without a pool
- Pool pump and heater — in a home with a pool, this competes with water heating and sometimes with the AC
- Refrigeration — including the extra fridge or freezer in a hot garage
- Laundry — the dryer more than the washer
- Everything else — lighting, electronics, and standby loads, which matter less than people assume now that lighting is mostly LED
Why the AC number keeps climbing
A cooling system loses capacity as it ages, as refrigerant charge drifts, as coils foul, and as duct leakage grows. The house still gets to temperature, so nothing seems wrong. It just runs longer to get there. That shows up as a slowly rising bill that nobody can point to a cause for.
The tell is runtime, not temperature. If the system runs nearly continuously on an August afternoon and used to cycle, that's the answer.
The seasonal swing is not a rate increase
A Southwest Florida bill routinely doubles between February and August. That's cooling load, not a tariff change. Before assuming you've been hit by a rate hike, compare the same month last year rather than last month this year.
When it really is the rate
It happens. Fuel and power cost adjustments move without a formal rate case, and approved base-rate changes phase in over several years. The way to tell them apart is to compare your cost per kWh year over year, not your total. If your usage is flat and your cost per kWh climbed, that's the rate. If your cost per kWh is flat and your total climbed, that's usage.
The loads people forget
- A well pump short-cycling on a waterlogged pressure tank — expensive and invisible until the tank is replaced
- A garage refrigerator working against 95°F ambient
- A pool heater set to maintain temperature rather than heat on demand
- An EV charging at the worst possible hour
- A dehumidifier in a closed-up seasonal home
What to do with this
Diagnose before you buy. If the problem is a fifteen-year-old AC system, adding solar to power an inefficient system means buying a larger array than you need. Fix the load first, then size the generation to what's left. That order saves money in both directions.
Questions worth asking
- Is my cost per kWh up year over year, or just my usage?
- How long does my AC run on an August afternoon, and did it used to cycle?
- What's my pool pump schedule, and is it single-speed?
• When this might not make sense
We'd rather lose a sale than put you in the wrong solution. Reasons we might tell you to wait or pass:
- —The bill is high because the house is large and occupied year-round — that's not a defect, and efficiency alone won't change it much
- —You're a seasonal resident and most of the bill is fixed charges
Sources
- Air conditioning share of U.S. home energy expenditures — U.S. Energy Information AdministrationPrimary
- Electricity use in homes — U.S. Energy Information AdministrationPrimary
- Residential Energy Consumption Survey (RECS) 2020 — U.S. Energy Information AdministrationPrimary
Find out which one it is
Send a recent bill and we'll tell you whether you have a rate problem, a usage problem, or an equipment problem.