Can I remove my chimney for solar?

If the chimney is disused: you can remove the chimney pot and reduce height. Full chimney removal costs £500-£2,000 and requires building regs. Discuss with your installer — it may be cheaper to use micro-inverters.

How much output do I lose from chimney shade?

With a string inverter: 5-15% of total annual output (more in winter). With micro-inverters: 1-5% (only affected panels). The investment in micro-inverters is usually worthwhile if chimney shading affects 2+ panels.

Can the installer predict the shadow exactly?

Yes — shading analysis tools (SunEye, PVsyst, Helioscope) model shadow paths hour-by-hour, month-by-month. Your installer uses this data to optimise panel placement and predict annual output accurately.

Chimney Shading and Solar

By Home Solar Guide Team|Updated 18 March 2026|educational

Independently written | Evidence-based | Sources cited

Chimney shading — Chimneys cast predictable shadows — good design and micro-inverters solve this.

Find out how much you could save

Answer a few questions and receive personalised solar quotes — completely free.

Start My Quote

Free, no obligation. Takes 2 minutes.

Ready to see how much you could save?

Get 3 free quotes from MCS-certified installers in your area.

Get Free Quotes

How does chimney shading affect solar panels?

Chimney shading is the most common rooftop shading issue for UK solar installations. KEY FACTS: (1) Shadow moves throughout the day as the sun crosses the sky. (2) Shadow is longest in winter (low sun angle) and shortest in summer. (3) IMPACT WITH STRING INVERTER: one shaded panel can reduce the whole string by 20-50%. (4) IMPACT WITH MICRO-INVERTERS/OPTIMISERS: only the shaded panel is affected (5-15% loss on that panel). (5) A good installer uses shading analysis software to predict shadow paths and position panels accordingly. SOLUTIONS: avoid placing panels in the primary shadow path. Use micro-inverters (£800-£1,200 extra) or SolarEdge optimisers (£500-£1,000 extra). In some cases, removing the chimney pot (if unused) reduces the shadow.

Frequently Asked Questions

Related: Home Heating Systems

Solar panels are most powerful when combined with an efficient heating system. Heat pumps use solar-generated electricity to heat your home at 300-400% efficiency — making them the ideal partner for solar.

heat pump installation process

Heat pump installation typically takes 2-3 days and is best planned alongside solar.

From our sister site Home Heat Pump Guide