Home battery storage in Miami, Florida

What does home battery storage do for a Miami home?

A home battery keeps chosen circuits running when the grid goes down — which solar alone cannot do, because a grid-tied system shuts off in an outage. What decides whether it will run your air conditioning is continuous output in kilowatts, not stored capacity. In Miami, that is usually the question that matters most, because cooling is the largest load in a Florida home.

County
Miami-Dade
Decides what can run
Continuous output (kW)
Decides how long
Usable capacity (kWh)
Building code zone
High-Velocity Hurricane Zone
Florida Building Commission

Last verified August 16, 2026

The two numbers that decide everything

Capacity, in kilowatt-hours, sets how long you can run. Continuous output, in kilowatts, sets what you can switch on at all. A battery with plenty of stored energy and modest output will keep a refrigerator cold all night and still refuse to start a central air conditioner.

Published specifications for the batteries we currently cover
ProductUsable capacityContinuous outputWarranty
Tesla Powerwall 313.5 kWh11.5 kW10 years
Enphase IQ Battery 5P5 kWh3.84 kW15 years

What is specific to Miami

Miami, Florida at a glance
CountyMiami-Dade
Predominant electric utilityFlorida Power & Light
Net-metering rulesFlorida PSC Rule 25-6.065 applies (investor-owned utility)
Permitting authorityCity of Miami Building Department
Building code zoneHigh-Velocity Hurricane Zone — stricter product approval and inspection requirements

Your utility: Florida Power & Light

As an investor-owned utility, FPL offers net metering under Florida PSC Rule 25-6.065. A customer-owned renewable system must be sized so that it is not expected to produce more than 115% of the home’s annual consumption, and the rule also limits generating capacity relative to the service capacity. Exported energy is tracked as a kWh credit that offsets later consumption, with any remaining credit settled annually at the utility’s avoided-cost rate rather than the retail rate.

Work out what your loads need

Choose the circuits you want running and see whether a given battery can actually carry them.

Open the backup calculator

Common questions

Will a battery run air conditioning in Miami?

It depends entirely on the continuous output rating and on your specific unit’s draw and starting surge. Some single batteries are rated to handle central air conditioning; smaller units are not, and extra capacity does not compensate. A load calculation on your equipment is what settles it.

Do I need solar as well?

Not to have backup. But without generation the battery cannot refill, so its runtime is fixed. In a multi-day outage after a storm — the scenario most people are buying for — that difference is the whole argument for pairing storage with solar.

Does storage qualify for Florida’s tax exemptions?

Storage installed as part of a solar energy system is generally treated as a component of it for the sales tax exemption. Storage bought entirely separately can be treated differently, so ask your installer how it applies to your quote.

Sources

What each source supports on this page, and when we last verified it. Every source we use, with its freshness policy, is listed in the source register.

  1. Powerwall 3 Datasheet

    Tesla

    Powerwall 3 energy capacity, continuous output, and warranty term.

    Verified August 16, 2026

  2. IQ Battery 5P data sheet

    Enphase Energy

    IQ Battery 5P usable capacity, continuous and peak output, chemistry and warranty.

    Verified August 16, 2026

  3. Florida Building Code — high-velocity hurricane zone and wind-borne debris provisions

    Florida Building Commission

    Wind-load and permitting requirements applying to rooftop solar installations in Florida, including the High-Velocity Hurricane Zone in Miami-Dade and Broward counties.

    Verified August 16, 2026

  4. Florida Statutes §212.08(7)(hh), Solar energy systems sales and use tax exemption

    Florida Legislature

    Exemption of solar energy systems and components from Florida sales and use tax.

    Verified August 16, 2026

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