Why You Still Get an Electric Bill With Solar

Solar rarely eliminates a bill entirely, and a remaining balance usually isn't a fault. Here's how to read what's left, and the specific signs that do warrant investigating.

You installed solar and still get a bill. This is normal, and it usually isn't a fault. But "normal" isn't the same as "nothing to look at" — so here's what's actually on that bill, and the specific signs that do warrant investigating.

What remains even when everything works

Non-bypassable charges. A portion of every kilowatt-hour you import funds public programs and cannot be offset by exports, no matter how much you generate. There's also typically a minimum monthly charge. Together these mean a bill of some size is essentially guaranteed.

Evening imports. Solar produces at midday. Most homes use the most between 4pm and 9pm. Without a battery, the evening comes from the grid — at the most expensive rate of the day.

Exports credited below retail. Under California's current net billing tariff (NEM 3.0), power you export is credited at avoided-cost rates that are often a small fraction of what you pay to import. Sending 10 kWh out at midday and drawing 10 kWh back at 6pm is not a wash. It can be a substantial net loss in dollar terms even at exactly break-even in energy terms.

That asymmetry is the single biggest source of confusion for people on NEM 3.0, and it explains most "my production looks fine but I still owe money" situations.

Seasonal mismatch. You bank credits in long summer days and draw them down through short winter ones. Mid-winter bills can be substantial even when the annual picture is healthy.

Reading a true-up

If you're on annual billing, most of the year's bills are small and one annual true-up reconciles everything at once.

Owing at true-up does not mean your system is broken. It generally means the value of what you imported over the year exceeded the value of what you exported — a dollar comparison, not an energy one. Under NEM 3.0 you can produce more kilowatt-hours than you consume and still owe money, purely because of the price difference between the hours you exported and the hours you imported.

The useful question isn't "did I owe anything?" It's "is what I owe consistent with my production and my usage?" — which requires looking at all three.

What does indicate a real problem

Worth investigating:

• Production well below the first year. Compare kWh produced against your first full year, not against the sales projection. A gradual decline of well under 1% a year is expected; a step change is not.
• A string or panel offline. Monitoring showing one string at zero, or consistently below its siblings, usually means an inverter or optimizer fault. This can persist for months unnoticed if nobody looks.
• Usage that grew and nobody adjusted. A new EV, a pool, a heat pump, or a new occupant can add more than the array ever produced. The system isn't failing; the load moved.
• A rate plan that no longer fits. Solar changes your net usage shape completely. The plan that suited you before may be wrong now, and utilities do not re-evaluate this on your behalf.
• New shading. Trees grow. A neighbor built an extension. Five years on, an array is not necessarily in the conditions it was designed for.

The part people find hardest to believe

Solar systems can be working perfectly and still produce a bill that feels wrong, because the economics changed under them. Someone who bought under NEM 2 and moved to NEM 3, or who compares their bill against a neighbor on a different tariff, is comparing different rules rather than different equipment.

Before concluding the hardware is at fault, check the tariff, the rate plan, and the usage. It's the equipment far less often than people expect.

What to actually do

Read your production data, not your bill, to judge the system. Your monitoring portal shows kWh generated. Compare against the same months in prior years.

Read your interval data to judge your usage. Green Button data shows exactly when you import — and for solar homes that's the whole story, since the evening peak is where the remaining money goes.

Re-check your rate plan. This is the most commonly missed item on this list. Your net usage shape after solar is a different animal, and the best-fit plan often changes with it.

Shift what you can into daylight. Every kWh you self-consume at midday is worth full retail to you; the same kWh exported may be worth a fraction of that. Running the dishwasher, laundry, and pool pump at noon rather than 7pm is worth considerably more under NEM 3.0 than it was under NEM 2.

About batteries

A battery genuinely helps under NEM 3.0, because it converts low-value exports into high-value avoided evening imports. Whether it pays back depends on your usage shape, your rate plan, and the installed cost.

We don't model that here — it needs system-specific data this audit doesn't collect, and a rough answer would be worse than none. What we can do is show you exactly how much of your remaining bill sits in the evening peak, which is the number any battery analysis has to start from. Take that to CheckYourSolar if you want it modeled properly.

Audit what's left on your bill →

Frequently asked questions

Why do I owe money at true-up if my solar covers my usage?

Because true-up reconciles dollars, not kilowatt-hours. Under NEM 3.0 exports are credited well below retail while evening imports cost full price, so you can produce as much as you consume and still owe money on the difference in value between the hours involved.

Is my solar system broken if my bill is high?

Usually not. Check production against your own prior years first. A gradual decline of under 1% a year is normal; a sudden drop suggests an inverter or string fault. More often the cause is increased usage, a rate plan that no longer fits, or the export-versus-import price gap.

Will a battery eliminate my electric bill?

No. Non-bypassable charges and minimum monthly charges remain regardless. A battery can substantially reduce evening imports, which is where most of a solar home's remaining bill sits, but no residential setup reduces the bill to zero.