Buying the panels and inverter is the big step, but you can’t “plug and play” a solar system without the right high-current infrastructure. Use this checklist to ensure your installation is safe, legal, and efficient.
1. Mounting & Racking System
Your panels need to stay secure for 25 years. We recommend aluminum rail systems that won’t rust.
- Mounting Rails: 2 rails per row of panels.
- Mid-Clamps: To secure panels to each other.
- End-Clamps: To finish the edges of your solar array.
- Roof Hooks/Brackets: Specific to your roof type (Tile, IBR, or Corrugated iron).
2. Specialized Solar Cabling (DC)
You cannot use standard household wire for solar. Solar cables are UV-resistant and designed for high-voltage DC.
- 4mm or 6mm Solar Cable: Red (Positive) and Black (Negative). Calculate the distance from your roof to your inverter and double it.
- MC4 Connectors: These are the waterproof “plugs” that connect panels. You’ll need at least one pair per string.
3. Battery Power Cables
The connection between your Lithium-Ion battery and your Hybrid Inverter carries massive current.
- 35mm or 50mm Battery Cables: Must be flexible copper with high-quality lugs.
- Communication Cable (BMS): Usually a specialized RJ45/CAN bus cable to let the battery “talk” to the inverter.
4. Protection & Safety (The “Legal” Bits)
To get your Certificate of Compliance (CoC) in South Africa, you must have dedicated protection.
- DC Combiner Box: Includes DC fuses and surge protection to protect your inverter from lightning and surges.
- DC Disconnect/Isolator: A heavy-duty switch to safely cut power between the panels and the inverter.
- AC Protection Box: Includes breakers and change-over switches for the “Eskom side” of your system.
Pro-Tip: The “Cost of Cheap Cable”
Using thin or poor-quality cable causes “Voltage Drop.” This means the energy your panels are making is lost as heat in the wires before it ever reaches your battery. Always use 6mm solar cable for runs over 10 meters to ensure maximum efficiency!
