Solar panel diagrams: inside a panel, and how a home system connects
Five drawings: the layers of one panel, panels in series and in parallel, and the three ways a home system is put together. Each one names its parts, and each is explained in words beside it.
They are simplified block diagrams, for understanding how the parts fit. None of them is a wiring diagram or the single line diagram an application needs; breakers, isolators and cable sizes are left out on purpose, because those are set for each house. For the why behind each part, see what is solar energy and how a solar inverter works.
Inside a solar panel
A panel is a sandwich in an aluminium frame. The drawing follows the JinkoSolar JKM600N-72HL4-V, a 600 W panel sold here, from the front to the back. Its datasheet names the glass, the cells, the frame and the junction box. It does not name the bonding layers or the back cover, so the drawing calls them by what they do.
The cells do the work. The 144 on this panel are half cells, 72 cut in two, which keeps the current in each one lower. The glass is 3.2 mm thick, tempered for strength, and coated so less light bounces off it. The datasheet rates the front for a 5400 Pa static load test. The junction box on the back is where the cell wiring comes out, and its two cables carry the panel’s output to the next panel or down to the inverter. The whole panel is 2278 by 1134 by 30 mm and weighs 27 kg, which is what a roof has to carry per panel. Mono and poly cells compared.
Solar panels in series and in parallel
Every panel has a positive and a negative cable. Join the positive of one to the negative of the next and they are in series: the voltages add. Join positive to positive and negative to negative and they are in parallel: the currents add. With two of the panels above, working at 44.06 V and 13.62 A each:
A grid-tied house system strings several in series, because the inverter needs a few hundred volts to work in. How many is a limit printed on the inverter’s datasheet, and the inverter page works it out for one real inverter and this panel.
A grid-tied solar system diagram
The most common home system, and the simplest. Panels make direct current, the inverter turns it into alternating current, and the main board sends it to whatever is switched on. Only what the house does not use reaches the meter, and a two-way meter counts it going out. At night, everything comes in from the grid.
Exporting through the meter is what net metering pays for, and the meter is where the utility’s side begins. The net metering single line, and which side of it you own.
A hybrid solar system diagram, with a battery
The same system with a hybrid inverter in place of the plain one. The battery connects to the inverter, and the inverter gets a second output for the circuits that should stay on in a brownout.
The battery charges from the panels’ surplus in the day and runs the backed-up circuits in the evening or in a brownout. How to size the solar battery, and what happens in a brownout with and without one.
An off-grid solar system diagram
No utility at all. Built from separate parts, the panels charge the battery bank through a charge controller, and the inverter takes its power from the battery, never from the controller, because an appliance starting up can draw more than the controller passes.
Off-grid sizing works from the worst week of weather rather than an average day, because there is nothing to fall back on. Sizing the charge controller.
How solar panels work, step by step
- Light lands on the cells. Each silicon cell turns some of it into a small direct current.
- The cells are wired together inside the panel, so one 600 W panel works at about 44.06 V.
- Panels are wired together on the roof into strings, which adds their voltage.
- The strings run down to the inverter, which turns the direct current into the 230 V alternating current the house uses.
- The inverter feeds the main board. The house uses what it needs first.
- Anything left over goes out through the meter to the grid, and at night the house draws from the grid, or from a battery if there is one.
What people ask about solar panel diagrams
How do solar panels work, step by step?
Light lands on the cells. Each silicon cell turns some of it into a small direct current. The cells are wired together inside the panel, so one 600 W panel works at about 44.06 V. Panels are wired together on the roof into strings, which adds their voltage. The strings run down to the inverter, which turns the direct current into the 230 V alternating current the house uses. The inverter feeds the main board. The house uses what it needs first. Anything left over goes out through the meter to the grid, and at night the house draws from the grid, or from a battery if there is one.
Is a solar panel AC or DC?
DC. A solar panel makes direct current, always. The inverter is what turns it into the alternating current the house and the grid run on, which is why every grid-connected system has one.
Are solar panels 12 or 24 volt?
Neither, for a house-size panel. 12 V and 24 V are battery voltages, and small panels are made to charge them. The 600 W panel on this page works at 44.06 V, and several are wired in series so the string reaches the voltage the inverter needs.
What is the difference between series and parallel solar panels?
In series the voltages add and the current stays the same: two of these panels give about 88.12 V at 13.62 A. In parallel the currents add and the voltage stays the same: about 44.06 V at 27.24 A. Grid-tied systems mostly use series strings; small battery systems often use parallel.
What are the parts of a solar panel system?
Panels, an inverter, the main board, and the meter. A hybrid system adds a battery and a backed-up output on the inverter. An off-grid system has no meter and adds a battery bank, and if it is built from separate parts, a charge controller between the panels and the battery.
Get the diagram for your own house
Send your monthly kilowatt-hours and say whether you want backup in a brownout. You will get a written answer with the system type, the parts and where each one goes.
Tell us the property and what you are trying to cut, and you will get a written answer with a size and a next step. No visit is booked and nothing is charged for asking.
Sources: JinkoSolar JKM580-605N-72HL4-(V) F8 datasheet, read 1 October 2026, the mechanical characteristics and the 600 W row; Deye, hybrid inverter category page, read 1 October 2026; Morningstar, How Does a Solar Charge Controller Work?, read 5 October 2026. Every drawing is a simplified block diagram for explanation and not a design for any installation.