Short answer: a complete solar system needs far more than panels, an inverter and a battery. A professional installation can include mounting rails and clamps, PV cable and connectors, DC fuses, DC isolators, surge protective devices, battery cables, battery disconnectors, AC breakers, earth-leakage coordination, distribution-board work, changeover arrangements, labelling, communication cables, CTs, monitoring and compliance documentation.
Complete solar component map
| Component | Purpose | Current Whitehouse catalogue example / indicative price* |
|---|---|---|
| Solar panel | Generates DC energy | 545–595W JA Solar panels roughly R1,449–R1,849 in the supplied catalogue snapshot |
| Hybrid inverter | Converts/manages AC, PV, battery and grid | Luxpower 5kW R7,799; Deye 5kW R16,499; Deye 8kW R22,699 current/listed examples |
| Lithium battery | Stores energy | 5.12kWh Shoto R13,899; Volta New Gen R14,949 current examples |
| PV combiner box | Combines/protects PV strings where design requires it | 1-in/1-out about R1,200; 3-in/1-out about R1,600–R2,500 in catalogue snapshot |
| PV DC fuse + holder | String/branch fault protection where required | Onesto 1000VDC fuses around R45; holder around R90 |
| DC surge protection | Limits transient overvoltage on PV side | Chanan 600V DC SPD around R320; other models vary |
| Battery disconnector | Safe battery isolation | Onesto 2P 160A battery disconnector around R220 |
| Battery fuse link | Protects battery cable/system against fault current | Onesto battery fuse links around R65–R75 depending on rating |
| Battery cable | Carries high DC current | 50mm² cable product listed around R185; confirm sold length/quantity on live listing |
| Mounting rails/clamps | Secures panels to roof structure | Mid/end clamps from about R19; roof clamps about R55–R65 in catalogue snapshot |
| AC protection / DB work | Protects and distributes inverter output | Project-specific |
| CT / metering / monitoring | Measures grid flow and system performance | Often supplied with or matched to inverter; model-specific |
| Labelling / CoC / testing | Documents and verifies installation | Project-specific |
*Indicative product examples from Whitehouse's supplied/current catalogue context. Prices, stock and project requirements can change; check live listings and request a site-specific quotation.
Why cable is not “just cable”
PV cable carries high DC voltage while battery cable can carry very high current at relatively low voltage. The same cross-section is not appropriate everywhere. Cable selection depends on current, voltage, run length, installation method, insulation temperature rating, grouping, fault protection and allowable voltage drop.
Why battery fuses and disconnectors matter
A lithium battery can deliver very high fault current. The BMS does not replace external circuit protection. The battery fuse and disconnector are part of protecting cables and allowing safe isolation for service.
Why a combiner box is not always required
A combiner is useful when multiple strings need combining and protection, but a small array connected directly to separate inverter MPPT inputs may use a different arrangement. Do not add components merely because they appear in another person's system.
Why surge protection matters
Solar systems create additional external conductors and sensitive electronics. Correctly designed SPDs help limit transient overvoltages on AC and DC sides. They do not replace earthing, breakers or a structural lightning-protection strategy where one is required.
Why the DB is often the hidden cost
Older or crowded distribution boards may require restructuring, additional enclosures, essential-load separation or correction of pre-existing issues before the inverter can be integrated safely. This is why equipment-only package prices should not be confused with a finished installation.
Think in four budget layers
Core energy equipment is the inverter, battery and PV modules. Balance-of-system equipment includes rails, clamps, cable, connectors and monitoring. Protection includes fuses, breakers, disconnectors, surge protection and DB work. Professional scope includes labour, testing, commissioning, CoC and registration/engineering support where applicable. A quote that shows only the first layer is not a complete project price.
Which components are optional?
Monitoring accessories, extra battery cabinets, smart load control and some convenience items may be optional. Safety devices are not “optional extras” simply because they are not visually exciting. The exact required protection depends on the design, but a professional quote should explain why each fuse, isolator, SPD and breaker is included.
Why a package price can change after a site check
Long cable runs, a full or non-compliant DB, difficult roof access, tiled versus IBR roofing, three-phase supplies, multiple PV strings and heavy-equipment lifting can all change labour and materials. This is why Whitehouse treats online equipment prices as a starting point and recommends a project-specific quotation for finished installations.
Examples you can inspect in the current Whitehouse catalogue include the Luxpower SNA5000 5kVA inverter, Shoto 5.12kWh lithium battery, 585W JA Solar Panel, 3-in/1-out Solar Combiner Box, Onesto 160A Battery Disconnector and Chanan 600V DC Surge Arrester.
FAQ
Do I need every component above?
No. The exact bill of materials depends on the inverter, number of strings, battery arrangement, building, supply and local compliance requirements.
Can I save money by buying parts separately?
Sometimes, but compatibility and duplicated/missing components can erase the saving. A coordinated quote is usually easier to commission and support.
Why does one installer quote much more for “extras”?
The extras may include genuinely necessary protection, cable, mounting, DB work and compliance—or unnecessary additions. Ask for the line-item purpose of each component.
Get a tailored Whitehouse solar or backup-power quote
Whitehouse Lighting & Electrical can help you build a solution around your actual loads, budget, property and expansion plans. We do not rely only on the products shown online; where a project needs a different inverter size, battery bank, protection arrangement or commercial configuration, we can source around the brief.
We arrange solar and backup-power solutions for homes and businesses across South Africa, including Secunda, Ermelo, Mpumalanga, Mbombela/Nelspruit, Johannesburg, the East Rand, Pretoria, North West and Bloemfontein. Panels, batteries and other bulky equipment may need a dedicated delivery quotation depending on route and handling.
Important: this guide is for planning and buying decisions. Cable sizes, protection ratings, earthing, DB alterations, PV strings and final system settings must be confirmed for the actual installation by appropriately qualified persons and the relevant manufacturer documentation.
