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Lauder – Rowlands Gill Solar Installation (2025)

6kW Solar PV System with Fox ESS EP12 Battery & Ohme Home Pro EV Charger

Sustainable Energy Engineering Ltd supplied and installed a complete home renewable system for Mr Lauder in Rowlands Gill. This included a 6kW solar PV array, Fox ESS battery storage, a hybrid inverter and an Ohme EV charging solution. The aim was to reduce grid dependence, protect against rising energy costs and power an electric vehicle using clean energy.

The mixture of split roof orientations required careful system design to ensure year-round output, supported by a high-capacity 10.36kWh battery to maximise self-consumption. An EV-ready distribution board and 20m SWA cable were installed to safely integrate the Ohme Home Pro charger.

Technical Information:

Solar Panels:JA Solar 500W DeepBlue 4.0 Pro
Number of Panels:12
Inverter:Fox ESS H1-5.0-E-G2 (5.5kW)
Battery Storage:Fox ESS EP12 (10.36kWh / 9.32kWh usable)
EV Charger:Ohme Home Pro
Mounting System:Renusol Roof Mounting Kit
Additional Components:Bird Mesh, SWA Cable, EV Distribution Board, AC Isolators


Installation Data

Installed Capacity6.0 kWp
Roof Splits2.5 kWp + 3.5 kWp
Orientation80° & 95°
Inclination30°
Postcode Region9E
Kk Values750 & 703
Shade Factor1.00
Estimated Annual Output4,340 kWh
Annual Usage (Assumed)2,759 kWh
Self-Consumption (PV Only)902 kWh
Self-Sufficiency (PV Only)33%
Self-Consumption (With Battery)2,328 kWh
Self-Sufficiency (With Battery)84%


25-Year Financial Summary

Net Present Value (NPV)£13,275.55
Discounted Payback Period11–12 Years
Internal Rate of Return (IRR)10.4%

What NPV Means: Net Present Value measures the long-term profitability of the system by comparing future savings against today's installation cost. A positive NPV indicates a strong financial return.

Discounted Payback: This shows how long it takes for discounted future savings to cover the installation cost. It is more accurate than a simple payback calculation.

Internal Rate of Return: IRR shows the percentage return on investment. A higher IRR indicates stronger financial performance.



Project Gallery:

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