<h2>Why System Size Matters</h2><p>Getting the size right is the single most important factor in maximising your solar return on investment. An undersized system won't offset enough of your bill, while an oversized system costs more upfront without proportional benefit.</p><h2>Step 1: Check Your Energy Usage</h2><p>Look at your electricity bills for the past 12 months and find your average daily usage in kWh. Most SA households use between 15–25 kWh per day.</p><h2>Step 2: Apply the Rule of Thumb</h2><p>A common starting point is to divide your daily usage by 4 (the average peak sun hours in SA). So a household using 20 kWh/day would need approximately a 5 kW system.</p><h2>Step 3: Factor in Future Usage</h2><p>If you're planning to add an EV, a pool, or a battery, size up accordingly. It's often more cost-effective to install a larger system now than to upgrade later.</p><h2>Step 4: Check Your Roof Space</h2><p>Each standard 400W panel requires roughly 2m². A 6.6 kW system (16–17 panels) needs around 30–35m² of usable north-facing roof space.</p><h2>Common System Sizes in SA</h2><ul><li><strong>6.6 kW</strong> — Most popular for average households (3–4 people)</li><li><strong>10 kW</strong> — Larger families or homes with a pool/EV</li><li><strong>13.2 kW</strong> — Maximum single-phase system in most SA areas</li></ul><p>Makn Energy provides free, no-obligation system sizing consultations. We'll analyse your bills and design a system that's right for your home.</p>