Solar Sid Calculator — What Will It Generate & Save?
Upload your ESB Networks HDF .csv — or enter annual usage if no smart meter. 460W panels, max 20, 3 roofs. Battery 5/10/15kWh. All client-side, file never leaves your device.
💛 From private group Solar Works in Ireland (8.7K members) — we reject 80% of join requests to keep spam & spammers out. Calculator built using real bills, systems in use & lots of coffee. Results are planning estimates rather than a quotation; a complete year of suitable data gives the best comparison.
1️⃣ Your Electricity Usage
Existing-solar HDFs are deliberately blocked: a smart meter records only grid import/export, so it cannot recover the total household load needed to compare a new solar-and-battery system. Use a pre-solar HDF, manual annual usage, or a dedicated battery-retrofit model.
2️⃣ Location — 32 Counties
Base: 916 kWh per kWp per year south-facing, central (conservative real-world Irish). County factor x Direction factor = final yield.
3️⃣ Your 3 Roofs — Fixed 460W Panels, Max 20 Total
Panels remaining: 20 / Total: 0 — 0.0 kWp
Directions: South=100%, East/West=85%, North=70% of yield. If you pick 10 South + 5 West, Roof 3 max becomes 5 automatically.
4️⃣ Battery — 90% Round-Trip Efficiency, Solar-Only Charging
Model: usable capacity shown above, 90% round-trip efficiency, 3.68kW charge/discharge power by default. Excess solar charges the battery and later covers household demand. No grid charging or forced export.
☕ If you find this calculator useful...
Please tell a friend about solarsid.eu and consider buying me a coffee!
Privacy: Your HDF .csv never leaves your device. All calculations happen in your browser. Built for Solar Sid — solarsid.eu — Private group Solar Works in Ireland 8.7K.