Grid-Tied vs. Off-Grid Solar Systems
Short answer: grid-tied systems stay connected to the utility and use net metering to offset your bill; off-grid systems disconnect entirely and rely on batteries for everything. Almost every Florida home should choose grid-tied, usually with battery backup.
Quick answer: A grid-tied system with battery backup, sometimes called a hybrid system, gives you net metering savings plus power during outages — without the cost and complexity of a fully off-grid setup designed to run with zero utility connection.
The terms get used loosely, so it’s worth being precise. There are really three configurations homeowners consider, and they behave very differently.
The three configurations
| Type | Grid connection | Battery required | Backup during outage |
|---|---|---|---|
| Grid-tied (no battery) | Yes | No | No — system shuts off automatically for safety |
| Grid-tied with battery (hybrid) | Yes | Yes | Yes, for backed-up circuits |
| Off-grid | None | Yes, sized for 100% of needs | Yes, entirely self-sufficient |
Why a plain grid-tied system shuts off in an outage
This surprises a lot of homeowners: a standard grid-tied solar system without a battery is required by code to shut down automatically when the grid goes down, even on a sunny day. That’s a safety requirement, so utility line workers aren’t at risk of a live wire being fed by your panels. It means solar alone, without storage, does not keep your lights on during a hurricane-season outage.
Why almost nobody in Florida should go fully off-grid
Going fully off-grid means sizing a battery and backup generation for your worst-case days — a stretch of cloudy weather with no utility fallback — which is expensive and usually unnecessary when a reliable grid connection already exists. A hybrid system gives you the same outage protection for the specific circuits that matter (refrigerator, medical equipment, some lighting and outlets) while still using the grid and net metering the rest of the time.
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Frequently asked questions
Will my solar panels work during a power outage if I don’t have a battery?
No. Standard grid-tied solar systems are required to shut off automatically during a grid outage for safety, even if the sun is shining. You need battery storage to keep power flowing during an outage.
What is a hybrid solar system?
A hybrid system is grid-tied but includes battery storage, giving you net metering savings during normal operation and backup power for selected circuits during an outage.
Is off-grid solar a good option for a Florida home?
For most homes with existing utility service, no — it’s significantly more expensive than a hybrid system and unnecessary when a grid connection is already available as a backstop.
Can I add a battery to an existing grid-tied system later?
In many cases yes, though it depends on your existing inverter and equipment. We evaluate this during a site visit if you’re adding storage to a system you already have.
Why do grid-tied systems shut off during outages?
It’s a safety requirement called anti-islanding, which prevents your solar system from feeding electricity back into lines that utility workers may be repairing.
Related guides
- How does solar battery storage work?
- What size battery do I need for my Florida home?
- Home solar, battery and EV charging in Florida
- Solar systems
- Battery storage
- Florida solar by city
Figures on this page are typical industry averages for planning purposes and assume Florida’s 14.5¢/kWh average residential rate and 5.5 peak-sun hours per day. Your actual numbers will differ based on your utility, roof, and system — request a free evaluation for figures specific to your home.