From a $900 interlock kit to a whole-home standby system — sized for Florida air conditioning, and installed before hurricane season rather than during it.
Central Florida loses power for two reasons: hurricanes, and ordinary summer thunderstorms that take a tree into a line. Lake Mary sees both. The question is not whether you will lose power but how long you are willing to sit in the dark with a refrigerator full of food and an August heat index.
You already own or plan to buy a portable generator. We install either a manual transfer switch feeding a selected set of circuits, or an interlock kit on your existing panel plus an exterior generator inlet. When the power drops you roll the generator out, plug in, and switch over by hand.
The critical function is that the interlock makes it mechanically impossible to close the generator breaker and the main breaker at once. That is what stops you backfeeding the utility line and electrocuting a Duke Energy lineman working down the street. This is exactly why the suitcase-cord approach some people use is both illegal and genuinely dangerous.
A permanently installed unit on a pad, fed by natural gas or propane, with an automatic transfer switch. It tests itself weekly, starts within seconds of an outage, and runs whether or not anyone is home. For households with medical equipment, a home office that cannot go down, or anybody who travels during storm season, this is the right answer.
| Option | Installed range | Covers |
|---|---|---|
| Interlock kit + inlet | $850 – $1,600 | Any circuit you choose, one at a time, up to generator capacity |
| Manual transfer switch 6–12 selected circuits | $1,300 – $2,200 | Pre-chosen essentials |
| Standby 18–22kW + ATS | $9,500 – $13,500 | Most of a typical Lake Mary home |
| Standby 24–26kW + ATS | $12,500 – $16,000 | Whole home including central air |
In Florida the generator conversation is really an air conditioning conversation. Running lights and a refrigerator is easy. Starting a central air compressor is not — the inrush current at startup is several times its running draw. A generator sized on running watts alone will stall the moment the compressor tries to start, usually at 2am in a house that is already 84 degrees.
We size on starting load, not running load, and where it helps we specify a soft-start device on the condenser, which can meaningfully reduce the generator you need to buy. That single detail sometimes saves more than the cost of the device.
Plan it in February, not August. Once a storm is named, standby unit lead times stretch, HOA architectural committees slow to a crawl, permit queues fill, and every electrician in Seminole County is booked. The homeowners who get through hurricane season comfortably made the call in late winter.
A whole-home air-cooled standby system — typically 18kW to 26kW — with an automatic transfer switch, pad, permit and inspection generally runs $9,500–$16,000 installed, with gas piping and the distance from the meter being the main variables. A manual transfer switch or an interlock kit for use with a portable generator is far cheaper, usually $850–$2,200 installed and permitted, and it covers the essentials. For a lot of Lake Mary homes the interlock is the sensible starting point.
Yes. Both standby generators and transfer switch or interlock installations require an electrical permit from the City of Lake Mary Building Division, and a permanently installed generator usually needs a mechanical or gas permit as well. There may also be setback and placement requirements, and if you are in an HOA community such as Heathrow or Timacuan, expect an architectural review on top of the city permit. We handle the city side and will tell you plainly what your HOA is likely to ask for.
It is not as convenient, but it is completely legitimate and code-compliant when installed correctly. An interlock is a mechanical plate on your panel that makes it physically impossible to energise the generator breaker and the main breaker at the same time — which is what prevents backfeeding the utility line and endangering line workers. You still roll the generator out, plug in the inlet, and flip breakers by hand. An automatic transfer switch does all of that itself within seconds of an outage, including while you are away from the house. The safety outcome is equivalent; the difference is labour and price.
Before hurricane season, not during it. Lead times on standby units, HOA approvals and permit scheduling all stretch badly once a storm is named, and every electrician in Central Florida is booked solid the week a system enters the Gulf. Late winter and early spring are the right window. If you are reading this in August, an interlock kit is the realistic option that can actually be done quickly.
Ready to get a number? Call (407) 974-3766 for a free written quote, or run the instant estimate tool first if you would rather see a range before you talk to anyone.
