The truth about the $0 electric bill: the fees solar doesn’t offset

Where the “$0 bill” idea comes from — and what’s true about it

The pitch isn’t entirely wrong — that’s what makes it sticky. A well-sized system really can generate as much energy as your home uses over a year, and the energy portion of your bill really can fall to almost nothing. Some months, with strong production and credits, it can even go negative.

But the energy portion isn’t the whole bill. As long as you’re connected to the grid — and virtually every solar home stays connected — part of what you pay each month isn’t for energy at all. Those charges don’t care how many panels are on your roof.

What a bill is actually made of

Every utility formats it differently, but almost every residential bill breaks into the same four pieces. Flip the example below to see what solar changes:

The charges that stay

The lines solar can’t touch are the ones that exist because you’re a grid customer, not because of how much energy you bought:

• The fixed customer or connection charge — a flat monthly amount for having a meter and a wire to your home. Every solar home still pays it.
• Minimum bills — some utilities set a floor your bill can’t go below, even in a month your credits covered everything.
• Non-bypassable riders — small per-kWh charges some utilities collect on every kWh you draw from the grid, even when credits offset the energy itself.
• Delivery on the energy you still buy — in supply-only net-billing states (ComEd and Ameren in Illinois, for example), export credits offset the supply portion of your bill, not delivery. Every kWh you draw from the grid at night still pays full delivery charges.
• True-up settlements — in some net-metering programs the monthly bill looks tiny all year, then an annual reconciliation settles what your exports didn’t cover.

What solar actually does to your bill

Here’s the honest framing: the usage-based portions of your bill are what solar attacks — and how hard depends on how much of your solar you use directly. Power you consume straight from your panels avoids both supply and delivery. Power you export and buy back later is credited differently by utility: some credit close to the full rate, while supply-only net-billing utilities credit just the supply side, leaving delivery on every grid purchase. A typical outcome isn’t $0; it’s a much smaller bill whose size depends on your utility’s rules and your self-use.

That’s also why honest payback math never assumes the whole bill disappears — it counts the share solar actually offsets. An estimate built on wiping out 100% of your bill is overstating your savings from the first line.

How to find your real number

You don’t need to decode tariff sheets to know what your bill would look like after solar — everything needed is already printed on the bill you have. Your rates, your fixed charges, your usage: it’s all there.

That’s exactly how Build Your System works: upload one recent bill and it reads your real rates and fees off it — no manual entry, no generic assumptions. And once it’s uploaded, that’s the last thing we need from you: the design, the production estimate, and the honest after-solar bill all build from there.