Real case in Hialeah: from $214.90 to an FPL bill of −$40.79

Yuniesky V. lives in Hialeah and is an FPL customer. In February, before going solar, his bill was $214.90. The following February, with the system running, FPL sent him a bill for −$40.79 with the words “DO NOT PAY” printed on it. That is not a gimmick or a promotion. It is the result of net metering and the credit his system built up over the year. Here is the mechanism, using the numbers on his bill, with nothing exaggerated.

What does the bill actually say?

The bill shows three concrete things: the amount before solar, the amount after, and the energy the house sent to the grid.

A kWh (kilowatt-hour) is the unit your utility uses to measure what you consume and what you produce. Those 898 kWh are energy the panels generated that the house was not using at that moment, so it went out through the meter into FPL’s grid.

Why can an electric bill come in negative?

Because in Florida, net metering credits every kWh you send to the grid at the same value you pay to consume one, and that credit carries over from one month to the next.

Net metering is the arrangement between your home and your utility: the meter counts in both directions. During the day the panels produce more than you use and the surplus goes out to the grid. At night you draw from the grid. At the end of the month, FPL calculates the net difference.

When you produce more than you consume, the surplus is not lost. It stays as a credit for the following month. FPL describes it that way: excess energy is deducted from your monthly bill or credited toward a future bill within the same calendar year. If that credit builds up over several months and then a low-consumption month arrives, like February in South Florida, the credit exceeds the usage and the bill shows a balance in your favor. That is what happened at Yuniesky’s house.

What does “DO NOT PAY” mean?

It means you owe nothing that month: your credit covered all of your usage and there was still some left.

FPL prints that line when the account balance is in your favor. The negative amount is not a check in the mail. It is a credit that stays on your account and gets used in the following months, when usage climbs (summer, air conditioning running hard).

At the end of the calendar year, Florida’s rule requires the utility to settle whatever energy is left over. That settlement is done at the utility’s generation rate, which is lower than the rate you pay to buy power. That is why a system should be designed to leave a small surplus, not a large one.

Heads up: a negative bill is not the monthly norm. In almost every month, a home with a properly sized system pays the utility’s minimum charge, the fixed cost of being connected to the grid. “DO NOT PAY” appears in the months when the accumulated credit exceeds usage. If someone promises you “a negative bill every month,” be skeptical.

Why did this house get there?

Because three things lined up at once: high usage before solar, a roof without shade, and a system designed with margin.

At E-Minded we design at around 110% of historical consumption, not 100%. That margin is what lets the system build credit in high-production months and cover the low-sun ones. It is also what backs our Minimum Bill Guarantee: if the system produces less than promised in any month, we pay the difference you overpaid to your utility. With a prior bill of $214.90, there was enough usage for a system of that size to make sense.

When will you NOT see a bill like this?

When the system is sized exactly to usage, when the roof has heavy shade, or when your consumption goes up after installing.

• System at 100% or less. It produces just enough to cover usage and never builds credit. You will pay the minimum charge, not get a balance in your favor.
• Shade or a poorly oriented roof. The panels produce less than the paperwork says. The bill drops, but does not reach zero.
• New consumption. A pool, an electric car, one more person in the house. The system was designed for the old usage, not the new one.
• Municipal utility or co-op. OUC, JEA, GRU and similar have their own credit rules. Do not assume it works like FPL.

What to check before deciding

• Pull your last 12 bills and look at usage in kWh, not just the dollar amount. Design is done on kWh.
• Ask what percentage of your consumption the proposal is designed for. At 100% or less, do not expect accumulated credit.
• Confirm that your utility credits 1 to 1 and when it does the annual settlement. FPL, Duke and TECO do; municipals, verify.
• Ask to see estimated production month by month, not just the annual total. That tells you which months you will pay the minimum and which may build credit.
• If you want to know what a system would do in your specific home, a diagnosis with your real numbers tells you before you sign anything.

For the full mechanism, read the guide on net metering in Florida. And for the opposite case, a bill that drops to the minimum charge and stays there, see the real case in Tampa with TECO.