Installer tools
High-level calculators for quotes and pack readiness. Guidance and estimates only — not stamped design or municipal approval. Use subject to our Terms & Disclaimer.
Estimated monthly kWh using a Southern Hemisphere (South Africa) profile — higher in summer (Dec–Feb), lower in winter (Jun–Jul).
| Month | Estimated kWh |
|---|
Estimate only — not 100% accurate. Southern Hemisphere / SA seasonal model. Shading, tariff structure, and export rules change real results. Calculations run in your browser. See the tools disclaimer and Terms & Disclaimer.
Search a dated City of Cape Town NRS 097-2-1 type-tested snapshot (June 2023). Other municipalities differ. Always confirm on the latest municipal PDF before you order or submit.
Opens the full volt drop workspace (cable table, job schedule, 5% UES pass/fail). Use All tools on that page to return here.
Open full volt drop calculator
Same site header and tools subnav on the volt drop page so you can jump back without using the browser back button.
Quick terms: Breaker / MCB — overload protection device Current capacity — how many amps a cable can safely carry PF — how effectively current does useful work (typically ~0.95) DoD — share of battery energy you plan to use kWp — rated PV array size Voc — panel open-circuit voltage from the datasheet DC — PV string / battery side (two-wire out + return) SSEG — grid-tied solar registration
All installer tools on this page (including the PV yield calculator, verify approved inverter, battery runtime calculator, cable / breaker calculator, DC / PV cable calculator, and volt drop calculator) are provided as free, high-level estimation and guidance aids for installers and clients.
Full legal terms: Terms & Disclaimer. Need a formal design or sign-off? Engage UES.