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Real MCS-certified installations across Scotland — from a £5,000 battery retrofit to a full £16,500-supported system with HES grant. Illustrative generation figures use MCS MIS 3002 Zone 2 methodology.

REAL PROJECTS, REAL FIGURES

Our work across Scotland

Every project below is a real installation carried out by our MCS-certified partner, Home Heating Services (Scotland) Ltd. Figures are illustrative unless stated otherwise — a free survey gives exact numbers for your property.

Perthshire
March 2026

What does a battery retrofit to an existing FiT system look like?

A battery was AC-coupled to existing panels with a new hybrid inverter, costing in the £5,000–£9,000 range depending on specification.

System
3.8 kWp existing panels (no change)
Battery
Duracell Dura5 — 5.32 kWh

What we did

AC-coupled battery addition with new hybrid inverter. Existing panels and FiT contract untouched.

Illustrative generation

3,200–3,500 kWh/yr (illustrative, MCS MIS 3002 Zone 2)

Outcome

Homeowner now stores daytime solar surplus and uses it in the evening instead of importing at peak rate. Export income via Outgoing Octopus at 12p/kWh supplements the original FiT payments.

Cost

Battery + inverter installed: within the £5,000–£9,000 range (exact figure confidential at customer request).

FiT generation payments continued unchanged. SPEN G98 notification handled by us.

East Lothian
January 2026

What happens when you replace a failing inverter?

A faulty inverter was replaced with a modern hybrid unit for £1,200–£2,500, restoring full generation within half a day.

System
4.0 kWp existing panels (no change)
Battery
None (customer chose inverter-only for now)

What we did

The original SMA inverter was showing E011 fault codes and had stopped exporting. Replaced with a modern hybrid inverter, battery-ready for a future upgrade.

Illustrative generation

3,400–3,700 kWh/yr (illustrative, MCS MIS 3002 Zone 2)

Outcome

System restored to full generation within half a day. Monitoring app installed so the homeowner can track output daily.

Cost

Inverter replacement installed: within the £1,200–£2,500 range.

Customer plans to add a Duracell Dura5 battery in autumn 2026 — the new inverter is compatible.

Stirlingshire
May 2026

What does a full solar system replacement involve?

Degraded panels were fully replaced alongside battery storage and a heat pump referral. Costs ranged from £12,000–£18,000 before grants.

System
6.6 kWp new panels replacing degraded 2010 originals
Battery
Duracell Dura5 x2 — 10.64 kWh (stacked)

What we did

Complete roof strip and refit with modern panels, new hybrid inverter, and stacked battery system. Old panels had lost over 20% output. Heat pump installed by our partner under HES grant.

Illustrative generation

5,400–5,900 kWh/yr (illustrative, MCS MIS 3002 Zone 2)

Outcome

Combined with a heat pump, the homeowner qualified for the full HES rural package: £9,000 grant + £7,500 interest-free loan (£16,500 total support) (Source: Home Energy Scotland, checked August 2026). Net out-of-pocket cost was significantly reduced.

Cost

Full system installed: within the £12,000–£18,000 range. After HES grant, net cost under £10,000 (Source: Home Energy Scotland, checked August 2026).

Building warrant was not required. SPEN G99 application managed by us (approved in 6 weeks). All figures are illustrative — actual costs depend on system size and property.

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