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Projects

Selected solar PV designs

Examples of designs and drawings we have produced for UK installers, from a 20 kWp pitched roof to a 546 kWp commercial site. Client and site details are anonymised.

546 kWp commercial 32 kWp with battery 20 kWp pitched roof CAD layout drawing
Commercial

546 kWp commercial rooftop design

A large commercial building with several roof sections, designed so that nearly all of the generation is used on site.

3D model of a large commercial building with solar panels across several roof sections
3D model showing panels across the roof sections.
546.3 kWpInstalled DC power
1,214PV modules, with 614 module-level optimisers
414 kWMaximum AC power, from 5 inverters
about 428 MWhEstimated annual production

The design

The simulation shows virtually all of the energy produced being used on site, with exports of under 1 MWh a year. The array meets around 12% of the site's annual electricity demand, so the system is sized to the building's load rather than to the roof area alone.

What we delivered

  • Roof array layout
  • Production and self-consumption simulation
  • Inverter and optimiser configuration

Estimated results

about 12%Of site demand met by solar
100%Estimated self-consumption of generation

Figures are estimates from the design simulation. Actual performance varies with weather and site usage.

Solar and battery

32 kWp rooftop design with 47.9 kWh of storage

A 60-panel array across two roof faces and a battery sized to carry the daytime surplus into the evening and overnight.

3D model of a commercial building roof with a 60-panel solar array laid out across two roof faces
3D roof model showing the panel layout across both roof faces.
32.1 kWpSystem size
60 panels535 W modules, 30 on each roof face
47.9 kWhBattery storage
30 kWHybrid inverter

The design

The building has two main roof faces pointing in opposite directions. The design places 30 panels on each, so generation is spread across the day instead of peaking around midday. Module-level optimisers are specified on every panel.

What we delivered

  • Solar PV system design and layout
  • Performance report with monthly generation estimates
  • Self-consumption and battery storage assessment

Estimated results

about 24,000 kWhEstimated annual generation
44% to 90%Estimated grid independence, solar only compared with solar plus battery

Figures are estimates from the design report, calculated using the MCS method. Actual performance varies with weather, usage and how the system is operated.

Pitched roof

20 kWp on a hipped tile roof, with shading assessed

A roof broken up by hips and dormers, where the layout and the shading assessment decide how much the system will really produce.

3D model of a hipped tile roof with three groups of solar panels laid out between the dormers
3D roof model showing the panel groups placed around the dormers.
20.0 kWpSystem size
43 panels465 W modules on two roof faces
20 kWHybrid inverter
about 11,300 kWhEstimated annual generation

The design

The panels are split between two roof faces, 29 facing south-south-west and 14 facing east-south-east, and mounted with roof hooks and rail on the tiles. Each array was checked with an MCS sun-path diagram, and shading losses of around 31% are built into the generation estimate, so the figure quoted is a realistic one.

What we delivered

  • Solar PV design and panel layout
  • Performance estimate including shading
  • Sun-path shading assessment for each array
MCS sun-path diagram showing where the sun path is blocked by shading to the west of one array
Sun-path diagram for one array. Red areas show where the sun is blocked.

Figures are estimates from the design report, calculated using the MCS method. Actual performance varies with weather and usage.

CAD drawing

Roof layout drawing for a curved building

A PV layout drawing for a building with several roof sections, with the panel groups set out clear of vents and other roof features.

CAD roof plan of a curved building showing panel groups set out across several roof sections, with a 3D view of part of the array
Roof plan with a 3D view of part of the array. Site details have been removed.
A3Drawing size, issued as a PDF
Plan and 3DLayout plus a 3D view of the array
AutoCADDrawn to a standard title block

What we delivered

  • PV layout plan across every roof section
  • 3D view of the array for the installer and client
  • Drawing issued for approval in a standard title block

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