Learn solar
How solar works
The four steps from sunlight to your outlets, the six parts of a system, why it switches off in an outage, and what changes over twenty-five years.
Get Solar Quotes What it costs
Written by HyreSolar Research Desk Primary-source research and fact checking
The short answer
Sunlight hits the panels and produces direct current. An inverter converts it to the alternating current your house runs on. Your home uses what it can, and the rest charges a battery or goes to the grid.
What makes solar complicated is that last step: what your utility pays for the surplus, and under what rules.
Get solar options for your home
Free, with no obligation. A person at HyreSolar reads it and gets back to you. Matching with solar professionals is not live yet.
What happens between sunlight and your outlets?
Four steps, and only the first involves the panels. What surprises people is what happens to the electricity afterwards.
Light knocks electrons loose in the silicon cells, producing direct current. Panels respond to light, not heat, and lose some efficiency as they get hot, so they keep working in cold climates.
Your house runs on alternating current. A string inverter handles the whole array, so one shaded panel can drag down its string. Microinverters or optimizers sit under each module so each works on its own. Inverter types compared.
Production feeds whatever is running: the fridge, the air conditioning, anything plugged in. Every kilowatt-hour used on site is one you do not buy at your retail rate, so running heavy loads in daylight keeps more of the value.
What the house does not use flows into a battery if you have one, otherwise onto the grid. What the utility pays for that surplus decides whether solar pays. Net metering vs net billing vs buyback.
What is a residential solar system made of?
Six components. A quote lists them; this is what each one does.
| Component | What it does |
|---|---|
| Solar panels | Silicon cells in a laminated, framed module, rated in watts and covered by a performance warranty on output. |
| Inverter | Converts DC to the AC your house runs on: one central unit, or small ones under each panel. Its warranty can be shorter than the panels’, so compare the two terms on your quote. |
| Racking and flashing | Rails, mounts and the flashings that seal every roof penetration. Workmanship here shows up years later as a leak, or does not. |
| Production meter and monitoring | Measures what the array makes and reports it. Without monitoring, a failed string can go unnoticed for months. |
| AC disconnect and interconnection | The switch the utility can open, and the agreement that allows your system to connect at all. |
| Battery, if you have one | Stores production for later. Optional, and a separate decision with its own arithmetic. |
Why does a solar system shut down in a power cut?
A grid-tied solar system disconnects itself the moment the grid goes down, even in full sun. That is deliberate, not a fault.
If the array kept pushing power onto the local network during an outage, it could energize lines that utility crews believe are dead. Anti-islanding protection exists for that reason.
Riding through an outage takes a battery and an inverter configured for backup, and then only the circuits moved onto a critical load panel stay live. Battery storage covers what that gets you. Wiring and panel work is for a licensed electrician.
What happens to a solar system over twenty-five years?
Solar panels lose a small amount of output each year. A performance warranty states the floor: output will still exceed a set percentage of the original rating after a given period. It is not an end date.
Inverter replacement during the system’s life is a normal, budgetable event rather than a failure. Panel degradation and system upgrades cover both.
Your inquiry
Tell us about your home
Nothing goes to a solar professional unless you agree.
Free, with no obligation: a person reads it and gets back to you. Matching is not live yet, so this is not a quote.
Get Solar Options
If you have done your research and want to speak with a solar professional, HyreSolar can help you explore available options.
Questions
How do solar panels make electricity?
Do solar panels work on cloudy days?
Do solar panels work at night?
What happens to electricity I do not use?
Does solar work during a power outage?
Do panels stop working after 25 years?
Written and audited by
HyreSolar Research
Primary-source research, data analysis and fact checking
We are a research desk, not a sales floor. We read the statute, the tariff, the code section, the federal filing or the manufacturer data sheet ourselves, and we publish the figure with the document it came from and the date we retrieved it.
Where a number cannot be traced to a primary source, we publish the shorter page and say what we could not verify. That rule has cost us whole sections, and it is why the rest can be checked.
- 160
- primary sources read and cited
- 228
- figures with a retrieval date
- 115
- federal and state government sources
- 66
- researched pages published
How this desk works
- Primary sources only. Statutes from the legislature’s own publishing system, federal data from the agency that collects it, code text from the adopted edition, manufacturer claims from the data sheet. We do not cite an article that cites a source; we go and read the source.
- Every figure carries its provenance. A named document and the date we retrieved it, so you can check it and so you know how old it is. Retrieval dates are not decoration: an EIA rate from May is a different fact from an EIA rate from August.
- We publish what we could not verify. Every research page carries a section naming the things we tried to establish and could not, and why. A paywalled standard, a state website that refused the request, a manufacturer that publishes no figure at all.
- We separate measurement from modeling from our own reasoning, and label which is which on the page. A laboratory measurement, an assumption inside a modeling tool and our own inference are three different kinds of claim and they are never presented as one.
- We do not sell solar, and we take no payment for placement, ranking or a favorable mention. Nobody buys a position on this site.
Authorship on this site is organizational: the analysis belongs to the desk rather than to a named individual, and we do not publish credentials we do not hold. Our editorial policy sets out how we source, date and correct what we publish.
HyreSolar is an independent solar information site. We do not install, finance, maintain or service solar systems.