10kW Solar Systems

Last updated: January 28, 2026

Maximum residential solar for complete energy independence. Powers your entire home with full backup capability.

Quick answer: 10kW is for heavy usage or full‑home backup including geysers and multiple ACs. 10kW systems represent the upper end of typical residential solar in South Africa. With sufficient battery storage, they can power an entire home indefinitely, including high-demand appliances like geysers and air conditioning.

What 10kW Powers

Complete home power:

Entire house simultaneously - Yes
Multiple air conditioning units - Yes
Electric geyser - Yes (with proper scheduling)
Pool pump + heating - Yes
EV charger (slow) - Yes
Workshop tools - Yes
Essentially unlimited for residential use

Typical 10kW System

component	specification	examples
Inverter	10kW Hybrid (or 2x5kW)	Deye, Sunsynk, Victron
Panels	18-20 x 550W	10-11kW array
Battery	15-20kWh Lithium	Stacked or parallel units
Daily Generation	40-50 kWh	Summer average
Backup Time	8-16 hours	With 20kWh battery

componentInverter

specification10kW Hybrid (or 2x5kW)

examplesDeye, Sunsynk, Victron

componentPanels

specification18-20 x 550W

examples10-11kW array

componentBattery

specification15-20kWh Lithium

examplesStacked or parallel units

componentDaily Generation

specification40-50 kWh

examplesSummer average

componentBackup Time

specification8-16 hours

examplesWith 20kWh battery

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Important Considerations

Before going 10kW:

Roof space: Need 40-50m² of unshaded north-facing roof
Single vs parallel inverters: 2x5kW can be more reliable
Battery sizing: 15kWh minimum recommended for meaningful backup
DB board upgrade may be required
Municipal approval needed for grid-tied systems

Price Disclaimer: Prices shown were verified on 29 January 2026. Prices may change without notice. We earn affiliate commissions on qualifying purchases.

All prices are in South African Rand (ZAR) unless otherwise stated. Shipping costs may apply depending on your location.

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10kW Solar Systems FAQs

With sufficient battery (20kWh+), a 10kW system can provide near-complete grid independence for most homes. True off-grid requires backup generator for extended cloudy periods and winter months. Most people stay grid-tied for backup security.

10kW of panels (18-20 x 550W) requires approximately 40-50m² of roof space. Panels are typically 2.3m x 1.1m each. The roof should be north-facing (or close) and unshaded during peak sun hours (9am-3pm).

For essentials (lights, TV, WiFi, fridge): 3-5kW. For average home with some backup: 5-8kW. For full home including high-demand appliances: 8-10kW+. Calculate based on your monthly kWh usage from your Eskom bill.

3kW system: R45,000-R70,000. 5kW system: R80,000-R120,000. 8kW system: R120,000-R180,000. 10kW system: R150,000-R250,000. Prices include panels, inverter, battery, and installation. Quality and battery size affect final cost.

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