What Is Actually in a Solar Package, and What Matched Really Means
“Solar package” is one of the least standardised words in the industry. Two quotes at the same price can contain very different things, and the gap is usually hidden in what has been left out rather than what has been put in.
The four things a package should contain
- A hybrid inverter. The brain. Runs your loads, charges the battery, switches to backup when the grid drops.
- A battery. Stored energy for the evening peak and for outages. Quoted in kWh.
- Panels. Quoted as a count and a wattage, which together give you kWp. Insist on both.
- Mounting. Rails, clamps and roof fixings, specific to tile, IBR or cliplock.
If a quote is missing any of these, it is not a complete package, and the missing item will appear later at a price you did not agree.
What “matched” actually means
A matched package is one where the four components have been chosen to work together, not simply listed on the same page. Three things have to line up.
Voltage class
The battery and the inverter must agree. A low-voltage 48V inverter takes an LV battery. A high-voltage inverter takes an HV bank. These are not interchangeable, and getting it wrong is the most common specification error in the market.
Communication protocol
The battery and inverter have to talk to each other so the inverter knows the true state of charge and can manage charging properly. Matching voltage is not sufficient. The specific battery has to appear on the inverter manufacturer’s compatibility list.
Array within the inverter’s window
String voltage has to sit inside the inverter’s MPPT range across the full temperature span, including a cold winter morning when open-circuit voltage is at its highest. Total array power has to sit within the inverter’s maximum PV input.
Get these three right and the system behaves as designed. Get one wrong and you have components that technically function while quietly underperforming, or that refuse to commission at all.
What a package does not include
This is where most price comparisons go wrong. A package price is a supply price. It does not include:
- Installation labour.
- The balance of system: DC and AC cabling, isolators, surge protection, earthing, combiner boxes.
- Distribution board work, including the changeover arrangement and often a new board or sub-board.
- The Certificate of Compliance for the electrical work.
- SSEG registration with your municipality or Eskom.
- Structural work, if the roof needs strengthening.
Those are real costs and they vary genuinely by site: roof type, distance from the board, condition of the existing installation. Any supplier quoting a single installed price sight-unseen is guessing, and the guess will be corrected in your favour or theirs on the day.
How to compare two quotes honestly
- Convert both to kWp and kWh. Not panel count, not “8kW system”. Array in kWp, storage in kWh, inverter in kW.
- Check what is excluded on each. The cheaper quote often excludes more.
- Check the battery is expandable and confirm the supported maximum.
- Check the warranty terms, and whether the battery warranty is in years, cycles or throughput. Those are very different promises.
- Confirm the equipment is officially supplied so the manufacturer warranty is registered in your name and actually enforceable.
Frequently asked questions
Why do package prices vary so much for the same kW?
Because the kW figure only describes the inverter. Battery capacity, panel count and panel quality vary enormously behind the same headline number, and battery is usually the largest single cost.
Can I buy the components separately?
Yes, and it can work out well if you match voltage class, communication protocol and array window yourself. A package removes that risk.
Is supply-only cheaper than a full installed quote?
The supply price is lower because it is a smaller scope. Compare like with like by adding an installation quote to the package price before deciding.
Do I need a Certificate of Compliance?
Yes. Any electrical work of this kind requires one, and you will need it for insurance and for the SSEG registration.
Next step
See 5kW and 6kW package prices, work out your size with the sizing guide, or browse all packages.
