How a Home Solar System Is Wired: The Setup Diagram Explained
TL;DR
In a typical Philippine grid-tied home, power flows in a simple chain: solar panels on the roof generate DC electricity, wiring carries it down to the inverter, the inverter converts it to the AC power your appliances use, and anything you don't use flows out through a bi-directional net meter to the grid for credits. A hybrid system adds a battery between the inverter and your loads for backup. The diagram and walkthrough below show exactly how the pieces connect.
If you’re trying to picture how a home solar system actually fits together, it helps to follow the power from the roof to your outlets. Here’s the setup as a diagram, then a plain-English walkthrough of each part.
Follow the power, step by step
1. Solar panels (the roof). Sunlight hits the panels and they generate direct current (DC) electricity. Panels are wired together into “strings” using MC4 connectors and PV cable, and mounted on racking that holds them at the right angle and survives typhoon winds.
2. DC wiring and protection. The panels’ DC output runs down to the inverter, passing through a DC isolator and breaker so the array can be safely switched off. Getting this circuit protection right is a safety essential, not an optional extra.
3. The inverter (the brain). The inverter converts the panels’ DC into the alternating current (AC) your home actually uses. It’s also where the system’s intelligence lives — monitoring output, managing the battery in a hybrid setup, and coordinating with the grid. A grid-tied system has no battery, so there’s nothing to charge-control; a hybrid inverter has the battery charge control built in. Either way you don’t need a separate charge controller — that’s only for DC-coupled off-grid setups (see inverter types).
4. The battery — hybrid systems only. A hybrid inverter can route surplus daytime solar into a battery, then draw from it during a brownout or at night. A plain grid-tied system skips the battery entirely, which is why it’s cheaper — and why it shuts off during a brownout.
5. Your home’s loads. From the inverter, AC power feeds your main electrical panel and runs your appliances. Solar covers your usage first; you only pull from the grid when your panels aren’t producing enough.
6. The net meter and the grid. Whatever solar you generate but don’t use flows out through a bi-directional (net) meter — installed by your distribution utility — and you’re credited for it under net metering. When your panels aren’t producing (night, heavy clouds), the same meter measures the power you import from the grid.
Grid-tied vs hybrid, in one line
- Grid-tied: panels → inverter → loads, with surplus to the grid. No battery, cheapest, no backup during outages.
- Hybrid: the same chain plus a battery off the inverter, so you keep power during a brownout.
For the full comparison, see grid-tied vs hybrid vs off-grid.
How panels are wired together
The panels themselves can be wired in series or in parallel, and that choice changes the voltage and current the inverter sees — it matters for matching the array to the inverter. We break that down in series vs parallel solar panels.
See your own system
To size the system for your home — how many panels, what inverter, whether a battery is worth it — run your bill through the solar panel calculator, or get free quotes from vetted installers who’ll design the actual wiring for your roof.
Frequently asked questions
What does a basic solar setup diagram look like?
Panels on the roof feed DC power through wiring to the inverter; the inverter converts it to AC for your home's loads; surplus flows out through a bi-directional (net) meter to the grid. A hybrid system inserts a battery between the inverter and your loads so power is stored for use during a brownout.
How are solar panels connected to the inverter?
Panels are wired together into 'strings' using MC4 connectors and PV cable, and that DC output runs to the inverter's input — usually through a DC isolator and breaker for safety. The inverter then converts the DC to the AC your home uses.
Where does the battery go in a solar system?
In a hybrid system the battery connects to a hybrid inverter (or a separate charge controller in a DC-coupled design). The inverter charges the battery from surplus solar during the day and draws from it when the grid is down or at night.
Do I need a charge controller in a grid-tied system?
No. A grid-tied system has no battery to charge, and a hybrid inverter has the charge control built in. A separate charge controller is only needed in DC-coupled off-grid setups where panels charge a battery bank directly.
What connects my solar system to the grid?
A bi-directional (net) meter, installed by your distribution utility. It measures both the power you draw from the grid and the surplus solar you export, so you get credited for exports under net metering.