Solar Panel Roof Load Calculator
Added dead load + wind uplift from a rooftop PV array.
PV adds only ~0.15–0.25 kN/m² — most roofs barely notice the weight. WIND is the real fight: uplift on tilted panels demands anchors or serious ballast; check that case with the uplift tool.
Formula
Solar Panel Roof Load Calculator is a free solar panel roof load for structural engineers, fabricators and site engineers — instant, accurate and 100% client-side, with the governing formula and reference shown next to the result so the number can be defended, not just quoted.
About Solar Panel Roof Load Calculator
Added dead load + wind uplift from a rooftop PV array. The calculation implements DL = (n·W_panel + ballast)·g / A (IS 875 Part 3; SEAOC PV ASCE 7 guidance). PV adds only ~0.15–0.25 kN/m² — most roofs barely notice the weight. WIND is the real fight: uplift on tilted panels demands anchors or serious ballast; check that case with the uplift tool.
How to use Solar Panel Roof Load Calculator
- 1Enter Number of panels.
- 2Enter Panel + frame weight each in kg.
- 3Enter Array footprint in m².
- 4Enter Ballast (if ballasted system) in kg.
- 5Read Added dead load, Total added weight instantly — no submit button needed.
- 6Need US units? Flip the SI/Imperial toggle and every field converts.
Why use Solar Panel Roof Load Calculator?
- ✓Implements the standard formula — DL = (n·W_panel + ballast)·g / A
- ✓Reference cited on-page: IS 875 Part 3; SEAOC PV ASCE 7 guidance
- ✓One-click SI ⇄ Imperial toggle — values convert in place, physics stays in SI
- ✓Runs entirely in your browser — nothing uploaded, free forever
Frequently asked questions
What formula does the Solar Panel Roof Load Calculator use?+
It computes DL = (n·W_panel + ballast)·g / A, per IS 875 Part 3; SEAOC PV ASCE 7 guidance. The formula is displayed under the result.
What should I keep in mind when using this calculator?+
PV adds only ~0.15–0.25 kN/m² — most roofs barely notice the weight. WIND is the real fight: uplift on tilted panels demands anchors or serious ballast; check that case with the uplift tool.
Can I use this for real structural design?+
It implements the exact textbook/code formula cited below the result and is ideal for sizing, checking and learning. Final designs should be verified by a qualified engineer against the full code with all load cases.
Is the Solar Panel Roof Load Calculator free to use?+
Yes — completely free, no sign-up, no limits. It runs client-side in your browser, so inputs stay private and results are instant even on slow connections.
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