Why your solar bill did not go away
You have panels and you are still paying the utility every month. Here is the structural reason — and the one number on your bill that tells you how big the gap is.
You put panels on the roof. The salesperson drew a picture where the electric bill went to almost nothing. It did not. You are now paying a solar payment and a utility bill, and it feels like you got sold twice.
Usually nothing is broken. This is what grid-tied solar does without storage, and it is worth understanding before anyone tries to sell you the fix.
Your roof and your house run on different clocks
Solar production peaks around midday. Household consumption peaks in the evening — everyone home, dinner cooking, laundry running, the air conditioning catching up from the afternoon.
So at 1pm your array is making more than the house is using, and the surplus flows out to the meter. At 8pm the array is done and the house is drawing everything from the grid.
Two separate transactions, same day, same roof.
The two prices are not the same price
Here is where it bites. What you are paid for the surplus you export and what you are charged for the power you import at night are set by your plan, and on most Texas retail plans they are not the same number.
Some plans pay a decent rate for exports. Some pay a fraction of retail. Some pay nothing beyond a monthly cap. Your plan documents call it a buyback, surplus credit, or net billing — the terminology is not standardised, which is itself telling.
If your plan credits exports well below what it charges for imports, then every kilowatt-hour that leaves your roof at noon and comes back at 8pm costs you the difference. Multiply that across a summer and you have your answer.
The number to look for
Pull up your most recent bill and find two figures:
- Energy delivered to you (kWh imported from the grid)
- Energy received from you (kWh exported to the grid)
If the second number is large and your bill is still substantial, you are exporting a lot of energy that you later buy back. That gap is the entire case for storage, and it is measurable on paper before anyone climbs on your roof.
If both numbers are small, storage will not do much for your bill — and we would rather tell you that on a phone call than after a site visit.
What a battery actually changes
It does not make more power. It moves power in time. The midday surplus goes into the battery instead of out to the meter, and comes back out in the evening instead of being bought from the grid.
Two secondary effects worth knowing:
- Outages. A standard grid-tied array shuts down when the grid drops — a safety requirement, so it cannot energise lines a crew is working on. Sunny afternoon, dark house. With storage properly configured, the panels can keep working into the battery.
- Plan changes. Once you are self-consuming rather than exporting, which retail plan suits you may change. That is a conversation, not a footnote.
What we will not tell you
We will not quote you a savings percentage on this page. Any honest figure depends on your usage shape, your plan's import and export rates, and how much of your evening a given battery size actually covers. Anyone who gives you a number before reading your bill is giving you a number they made up.
Upload your latest bill, book a call, and we will do that arithmetic with you in about thirty minutes — including the version where the answer is that it is not worth it.
Want this checked against your actual bill?
The call takes 30 minutes and costs nothing. We read your bill with you and put the arithmetic in writing.
Keep reading
- Deregulated, co-op, or Entergy: how to read your Texas power bill Three lines on your bill decide whether you can shop for electricity in Texas — and whether half the offers in your mailbox apply to you at all.
- What actually happens in your house when the grid drops The order things fail in, why the second hour is worse than the first, and what a battery changes about the sequence.
- Battery or generator: an honest comparison Where a standby generator genuinely wins, where a battery does, and the maintenance question nobody brings up at the sales table.