1 battery
Essential Loads Overnight
Refrigerator, some lighting, internet and a few outlets stay on through an overnight or multi hour outage. One Powerwall 3 also backs up a 200-amp utility meter.
Tesla Powerwall Installer in Florida
Whole home battery backup engineered for hurricane season, installed by a Tesla Powerwall installer licensed in Florida since 2019.
Tesla Energy
Certified Installer
FL Licensed
Solar + Roofing + Electrical
Veteran Owned
Led by those who have served
Straight answer
How Much Does a Tesla Powerwall 3 Cost in Florida?
A single Powerwall 3 starts at $15,000 installed in Florida through our Tesla Powerwall installation team. The setup we quote most often is a Powerwall 3 plus one Expansion unit, at $25,000 installed. Two full Powerwall 3 units run $29,000. Each unit stores 13.5 kWh usable. Your exact quote is confirmed after a site survey.
- Usable capacity
- 13.5 kWh
- Per Powerwall 3 unit
- Continuous output
- 11.5 kW
- On-grid and backup power
- Starting at
- $15,000
- Single Powerwall 3 installed with a Gateway 3
- Protection
- 5 years
- Workmanship warranty, plus Tesla's 10 year equipment warranty
Pricing shown is typical and a starting point. Your exact quote is confirmed after a site survey and depends on roof condition, electrical service, equipment choices and distance from a Coastal Energy location.
Get an accurate quotePowerwall 3 specs
What Is Actually Inside a Powerwall 3
Powerwall 3 has an integrated solar inverter built in, which is new compared to Powerwall 2, so it can pair directly with new solar or bolt onto an existing array.
13.5 kWh Usable capacity
Per Powerwall 3 unit
11.5 kW Continuous output
Starts central ACs and well pumps (185 LRA motor start, 200-amp service)
97.5% efficient Solar inverter built in
Six MPPT solar inputs, pairs with new or existing solar
Outdoor rated Built for Florida weather
Flood and dust resistant, operates from -4°F to 122°F, mounts indoors or out
10 years Warranty
Equipment, unlimited cycles, backed by our 5 year workmanship warranty
Cost ranges
Powerwall 3 Configuration Pricing in Florida
The Powerwall 3 plus one Expansion unit is the setup we quote most often, since it gives most homes meaningful whole home backup at a lower cost than two full Powerwall 3 units. Prices below are starting points; your exact quote is confirmed after a site survey.
| Configuration | Usable capacity | Starting installed price |
|---|---|---|
| Powerwall 3 + Expansion (most common) | 27 kWh | $25,000 |
| 1 Powerwall 3 (single unit) | 13.5 kWh | $15,000 |
| 2 Powerwall 3 units | 27 kWh | $29,000 |
| Expansion unit added to existing system | +13.5 kWh | $9,500 each |
| Battery added to existing solar | 13.5 kWh | Quoted after evaluation |
Every Powerwall install includes the Tesla Backup Gateway. Prices are starting points and may change based on electrical service, conduit runs and permitting. Federal residential tax credits have expired; depreciation may be available depending on your tax situation, and we can connect you with Solar ITC to review it.
Sizing
What the Battery Storage Actually Covers
We size battery capacity from your daily kilowatt hour usage, not a generic rule of thumb. A pool pump, well pump or central AC changes the math fast. Every system includes a Tesla Backup Gateway, which senses an outage and switches your home to battery power automatically.
2 batteries
Whole Home Backup
A Powerwall 3 plus one Expansion unit, the setup we install most often. Covers a full home, including AC cycling, for a solid stretch of a multi day storm outage when paired with solar recharge.
2 batteries
Whole Home Plus Pool, Well and EV Charging
Two full Powerwall 3 units carry heavier loads like pool equipment, a well pump and EV charging, common on larger homes. Two units can back up a 400-amp utility meter.
1 battery
More Runtime on an Existing System
An Expansion unit added to a Powerwall already on the wall adds 13.5 kWh and stretches how long your backup lasts.
1 battery
Battery Backup Added to Existing Solar
A Powerwall 3 can be AC-coupled onto panels you already have, with or without replacing your existing inverter.
Compare
Powerwall 3 vs Other Home Battery Options
Every battery on the market has tradeoffs. Here is how Powerwall 3 stacks up against the alternatives we also install.
| Battery | Usable capacity | Continuous output | Solar inverter built in | Warranty |
|---|---|---|---|---|
| Tesla Powerwall 3 | 13.5 kWh | 11.5 kW | Yes | 10 years |
| Enphase IQ Battery 10C | 10.5 kWh | 5.12 kW | No, uses microinverters | 15 years |
| EcoFlow Ocean Pro | 12 - 24 kWh | 7.2 kW | No | 10 years |
Continuous output matters more than capacity if you want central AC or a well pump to run through an outage. Powerwall 3 has the highest continuous output of the batteries we install.
Storm season
What Powerwall Actually Does During a Florida Hurricane
Switches Over in Under a Second
When FPL, LCEC, Duke Energy or your utility drops, the Backup Gateway senses it and islands your home from the grid automatically. No generator to start, no fuel to store, no transfer switch to throw in the dark.
Solar Keeps Recharging It
If skies clear while the grid is still down, common after a named storm in Southwest Florida, your array keeps refilling the battery instead of you draining a fixed reserve.
Storm Watch Fills It First
We program the Tesla app for Storm Watch, so the Powerwall charges to 100% on grid power ahead of a forecast storm instead of starting the event on whatever charge was left.
Rarely Needs a Service Upgrade
Backed up breakers land directly in the Tesla Gateway, so most Florida homes add Powerwall 3 without a main panel upgrade.
Built to Sit Outside
The enclosure is flood and dust resistant, rated for indoor or outdoor mounting.
Install timeline
Tesla Powerwall Installation Timeline in Florida
Step 01
Load and Usage Review
We read your last 12 months of usage and pick the circuits to back up.
Step 02
Site Survey
We check the panel, meter and wall space for the units.
Step 03
Permitting
County permit and utility interconnection filed.
3 to 6 weeksStep 04
Installation
Powerwall and Backup Gateway mounted and wired on site.
1 to 2 daysStep 05
Commissioning
Transfer tested, Tesla app set up, Storm Watch enabled.
Warranty
What the Powerwall Warranty Covers
Tesla backs every Powerwall 3 with a 10 year equipment warranty covering the battery, inverter and enclosure with no cycle limit, meaning you can charge and discharge it daily without voiding coverage. Tesla also guarantees the battery retains a minimum usable capacity through the warranty period.
Every Tesla Powerwall installation carries our 5 year Coastal Energy workmanship warranty, measured from the date of system activation and fully transferable to the next owner. That covers our installation work: the mounting, conduit, wiring and penetrations. Tesla's 10 year equipment warranty covers the Powerwall hardware itself, and our service division handles Tesla-authorized warranty claims directly.
Answers
Frequently Asked Questions
How Much Does a Tesla Powerwall Cost?
Tesla Powerwall cost depends on unit count, Gateway configuration and panel work. Installed pricing starts at the range shown on this page and is confirmed after we review your panel and load list.
Battery Backup vs Generator for Hurricanes: Which Is Better?
In a battery backup vs generator for hurricanes comparison, batteries switch over instantly, need no fuel and run silent, while generators run longer on a fuel supply. Most generator vs battery backup Florida decisions come down to whether you have solar to recharge from.
Do You Offer Home Battery Backup Installation Across Florida?
Yes. Home battery backup installation and solar battery backup Florida wide are core work for us, whether the goal is battery backup for power outages day to day or battery storage for hurricane season.
What is the most common Powerwall configuration you install?
A Powerwall 3 plus one Expansion unit at $25,000 installed. It gives most Florida homes 27 kWh of usable capacity, enough for meaningful whole home backup, at a lower cost than two full Powerwall 3 units.
Can I add a Powerwall to solar panels I already have?
In most cases yes. The Powerwall 3 can be AC-coupled, so it can be added with or without replacing your existing inverter. We evaluate your inverter and array during the site survey, then integrate the Powerwall 3 and a Backup Gateway into your current system.
Do I need a main service upgrade to add Powerwall 3?
Rarely. We land backed up breakers directly in the Tesla Gateway, which avoids the cost and delay of a full service upgrade for most Florida homes.
How long does Powerwall installation take?
The physical install is usually 1 to 2 days. Including electrical permitting and utility interconnection approval, most projects take 3 to 6 weeks from signed contract to commissioning.
How Do You Handle Powerwall Sizing for a Hurricane Outage?
Powerwall sizing for hurricane outage planning starts with the loads you want to keep, usually AC, refrigeration, well pump and internet, then we model multi day recharge from the array.
How Many Batteries Do I Need to Power My House?
The amount of battery storage you need depends on your essential load. One Powerwall 3 covers most critical loads overnight, two covers whole home use including central AC for many Florida homes.
How much does a Tesla Powerwall installation cost in Florida?
A single Powerwall 3 starts at $15,000 installed. The setup we quote most often, a Powerwall 3 plus one Expansion unit, runs $25,000. Two full Powerwall 3 units run $29,000, and adding an Expansion unit to an existing Powerwall system is $9,500 each. Your exact quote depends on electrical service, conduit runs and permitting.
How long will a Powerwall 3 power my house during an outage?
One Powerwall 3 covers essential circuits for roughly a day depending on load. With solar recharging it during daylight, most homes can stretch backup through a multi day outage, and the Powerwall 3 plus Expansion configuration extends whole home coverage further.
Do I need solar panels to install a Powerwall?
No. Powerwall 3 can be installed standalone for backup power and charged from the grid, though pairing it with solar lets it recharge for free during an extended outage.
Is Powerwall better than a whole home generator?
Powerwall starts instantly with no fuel to store, runs silently, and recharges from solar during a multi day outage. A generator can produce more continuous power for larger loads but needs fuel and manual maintenance.
Is Coastal Energy a Tesla Powerwall Premium Installer?
Yes. We are a Tesla Powerwall Premium Installer, which means our crews have completed Tesla's Powerwall-specific training and meet Tesla's installation quality standards for whole home battery backup.
Keep reading
Related Pages
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Generac Generators & PWRcell 2
Compare Powerwall with Generac generators and PWRcell 2 batteries.
Financing Options
Loan terms through Climate First Bank.
Ready to Stop Worrying About the Grid?
Send us your address and a recent power bill. We size a Powerwall system, or a Powerwall plus solar system, and give you a real Florida price.