Solar Help & Guide

A 20kW commercial solar system generates around 17,000 kWh per year. This guide covers real costs, ROI, AIA tax relief, G99 approval, export limits and what determines whether this size will actually perform well on your building.

A 50kW solar system generates around 42,500 kWh per year and suits businesses spending £18,000–£24,000 annually on electricity. This guide covers real costs, ROI, AIA tax relief and what determines payback on a commercial site.

A 75kW solar system sits between 50kW and 100kW — often the right fit for mid-sized commercial sites. Covers real costs, ROI, AIA tax relief, G99 approval and what determines payback.

A 30kW solar system generates around 25,500 kWh per year, avoids G99 approval delays, and suits businesses spending £8,000–£15,000 on electricity. Complete 2026 guide covering costs, savings, AIA and payback.

A 100kW commercial solar system generates around 85,000 kWh per year. This guide covers real costs, ROI, AIA tax relief, G99 approval and what determines payback on large commercial sites.