North-facing arrays remain the classic Australian recommendation, but east-west splits increasingly win on real roofs with export limits and morning/evening loads. This comparison shows how orientation changes daily curves, self-consumption and battery pairing — with 2026 tariff logic — before you lock a layout with CEC-accredited designers via MrSolar.
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In southern Australia, true north (with appropriate tilt) maximises annual energy for a given kW. That suits homes that consume heavily through the middle of the day or that still value export. On export-limited feeders, a sharp midday peak may simply clip or curtail — making “maximum kWh” less valuable than it looks on a brochure. A site assessment with photos, stringing plan and shade notes beats brochure layouts; mismatched orientations need separate MPPTs or module-level electronics. Use this comparison to brief installers with a clear preference and a fallback — then price both options with the same CEC-accredited shortlist via MrSolar so hardware choices stay constant. Save PDFs of every plan, approval and datasheet — warranty claims years later depend on that trail.
Splitting modules across east and west roofs spreads generation into mornings and late afternoons. Households with breakfast/dinner loads, WFH patterns or EV charging after work often self-consume more. Total annual kWh may drop slightly versus a perfect north plane, yet bill savings can rise when fewer electrons are exported at 2–8c/kWh. A site assessment with photos, stringing plan and shade notes beats brochure layouts; mismatched orientations need separate MPPTs or module-level electronics. Use this comparison to brief installers with a clear preference and a fallback — then price both options with the same CEC-accredited shortlist via MrSolar so hardware choices stay constant. Photograph your switchboard and roof planes before quoting day to cut variation risk.
A shaded “north” plane loses to a clean east-west pair. Dormers, vent pipes and trees decide more than forum arguments. Microinverters or optimisers can help complex roofs but add cost. Demand a shade report with the quote, not a verbal assurance. A site assessment with photos, stringing plan and shade notes beats brochure layouts; mismatched orientations need separate MPPTs or module-level electronics. Use this comparison to brief installers with a clear preference and a fallback — then price both options with the same CEC-accredited shortlist via MrSolar so hardware choices stay constant. Save PDFs of every plan, approval and datasheet — warranty claims years later depend on that trail.
Batteries charged by midday north peaks can still serve evenings; east-west can reduce the depth of storage needed for late-day loads. With ~$372/kWh usable federal battery support since 1 July 2025, model both orientations with and without storage. The winner is tariff-specific. A site assessment with photos, stringing plan and shade notes beats brochure layouts; mismatched orientations need separate MPPTs or module-level electronics. Use this comparison to brief installers with a clear preference and a fallback — then price both options with the same CEC-accredited shortlist via MrSolar so hardware choices stay constant. Photograph your switchboard and roof planes before quoting day to cut variation risk.
Ask three CEC-accredited installers on MrSolar to present north-heavy and east-west options where the roof allows. Compare modelled self-consumption, not only annual kWh. Pick the layout that survives a low FiT assumption. Compare at least three Clean Energy Council accredited proposals with identical inclusions, product models and workmanship warranty terms before you sign. Use this comparison to brief installers with a clear preference and a fallback — then price both options with the same CEC-accredited shortlist via MrSolar so hardware choices stay constant. Save PDFs of every plan, approval and datasheet — warranty claims years later depend on that trail.
East-west can match morning/afternoon loads and EV charging windows better than a pure north peak at noon when everyone is at work. If you are home in the afternoon with air-conditioning, west-weighting may beat textbook north. Model bill outcomes with a conservative FiT (often 3–5c/kWh stress-test) and your real weekday daytime load — exported energy rarely beats displacing retail imports in 2026. Use this comparison to brief installers with a clear preference and a fallback — then price both options with the same CEC-accredited shortlist via MrSolar so hardware choices stay constant. Photograph your switchboard and roof planes before quoting day to cut variation risk.
On export-limited feeders, a sharp north midday spike may clip or dump energy you cannot export. A split east-west profile can keep more energy inside self-consumption. Ask installers to model both against your DNSP limit. Model bill outcomes with a conservative FiT (often 3–5c/kWh stress-test) and your real weekday daytime load — exported energy rarely beats displacing retail imports in 2026. Use this comparison to brief installers with a clear preference and a fallback — then price both options with the same CEC-accredited shortlist via MrSolar so hardware choices stay constant. Save PDFs of every plan, approval and datasheet — warranty claims years later depend on that trail.
Compare orientation options on real roof plans — get CEC-accredited designs via MrSolar.
Written and reviewed by Daniel (Marketplace lead, Epic Unicorn Pty Ltd). We build pages from Australian solar datasets and regulatory references, then map you to CEC-accredited installers only.
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