Slashing Energy Bills by 74% in Cardiff!
How EMT Installations helped one homeowner turned rising energy costs into long-term savings with solar panels and battery storage.
Project Overview
The homeowner wanted a smart solution to cut down on soaring energy bills. Our tailored solar + battery installation was designed to maximise self-consumption and keep as much clean, low-cost power in the home as possible.
System Cost: £8,197 (inc. VAT)
System Size: 3.52 kW (8 × Jinko Tiger Neo 440W panels)
Battery Storage: 5.8 kWh SolaX
Customer Goal: Reduce rising energy bills and increase independence from the grid
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Performance & Savings
Estimated Annual Generation: 2,892–3,018 kWh
Annual Savings: £361.40
Electricity Bills Reduced: From £490 → £129 per year
Payback Period: 25+ years
The system now covers the majority of annual electricity demand, a huge step towards energy independence.
Battery Storage Benefits
The 5.8 kWh battery transforms how the system works:
Solar used directly (without battery): 33%
Solar used with battery: ~74%
On-site storage used: 815 kWh annually
Grid reliance cut to just 26%
Result: More of the solar power generated is kept and used in the home instead of being exported.
Grid Export & Energy Use
Export to Grid: 1,450 kWh per year
Import from Grid: 525 kWh per year
Daily Average Generation: 8.2 kWh
Daily Household Use Covered by Solar + Battery: 5.5 kWh
Overall Energy Independence: 74%
Environmental Impact
This installation makes a measurable difference:
🌱 Annual CO₂ reduction: 599 kg
🚗 Equal to 2,139 miles driven in a diesel car
🌳 Equivalent to the carbon absorption of 27 trees per year
Summary
This 3.52 kW solar array with 5.8 kWh battery:
Cuts electricity bills by ~74%
Delivers ~£361 annual savings
Avoids nearly 600 kg of CO₂ each year
Creates long-term energy security and independence