Douglas’s Solar Panel Installation in Woking

Installation photos — Woking, Surrey

Powered by Tesla Powerwall 3

Douglas’s home — Woking, SurreyA 22-panel DMEGC array paired with a single Tesla Powerwall 3 — a clean, all-in-one inverter-and-battery combination that keeps the home running through the evening peak with minimal kit on the wall.

£42K

Lifetime client savings

9.9 KW

System size installed

49K Kg

CO₂ saved

Panels installed

CLIENT

A family home in Woking wanting a tidy, premium battery solution with the simplicity and brand assurance of Tesla.

The Project

The brief was high storage with a single, integrated unit. The Tesla Powerwall 3 combines hybrid inverter and battery in one enclosure, so a large 22-panel array could be paired with whole-home backup capability without a wall full of separate components.

The technical scope included:

22 × DMEGC 450W solar panels (9.9 kWp total capacity)
1 × Tesla Powerwall 3 with Tesla Gateway (13.5 kWh usable)
Tesla app for monitoring and backup control
Bird mesh fitted to all pitched-roof panels

The Solution

Solar4Good delivered a clean, minimal Tesla installation from survey through to commissioning.

Key aspects included:

All-in-One Unit – Powerwall 3 combines hybrid inverter and battery in a single enclosure.
Whole-Home Backup – Tesla Gateway provides power-cut protection for the property.
Large Array, Tidy Install – 22 DMEGC panels with minimal kit on the wall.
Safety & Compliance – Installed fully in line with UK building and electrical standards.

The Result

Around 9,400 kWh generated each year, with the Powerwall covering evening demand and providing backup during outages — a premium system with a clean, minimal install.

Environmental impact:

Average CO₂ savings: 1,970 kg/year
Equivalent to planting 2,000 trees over the system’s lifetime
Lifetime CO₂ offset: ~49,000 kg

Financial savings:

Lifetime savings: ~£42,000
Average savings: ~£1,690 per year
ROI / Payback period: 8–9 years

Client benefits:

Premium Tesla brand assurance
Whole-home backup during power cuts
Significant contribution towards Net Zero
Clean, minimal wall installation

Financial Impact

Lifetime Energy Saving

£42,000

System Cost

£14,800

Estimated ROI

8-9Years

Average Annual Savings

£1,690

Average Monthly Savings

£141

Average Weekly Savings

£32

Energy Production

Annual Energy Generation

9,400kWh

Specific Yield

950kWh / kWp

Self Sufficiency

~62%

Environmental Impact

Lifetime Carbon Offset

49,000kg CO₂

Equivalent Trees Planted

2,000

Average Carbon Offset Yearly

1,970kg CO₂

Methodology & assumptions. All figures are modelled estimates, not metered results, and are rounded for presentation.

Generation: system size (kWp) × regional specific yield (800 kWh/kWp Highlands, 920–950 kWh/kWp England).
Savings: self-consumed units at the 24.67p/kWh Ofgem residential rate; exported units at 7p/kWh (conservative SEG).
Lifetime savings: annual saving × 25 years (no tariff escalation applied).
ROI: system cost ÷ annual saving. Carbon: ~0.21 kg CO₂/kWh grid displacement; trees are illustrative only.

Actual savings depend on each household’s consumption, generation and tariff at the time of install. Solar4Good is MCS-certified.