Pennington Haulage
A fully off-grid haulage operation transformed through intelligent battery storage and solar generation — eliminating 98% of diesel dependency with no grid connection required.
Pennington Haulage operates a 24/7 logistics facility in Northwest England with no grid connection. Prior to this installation, the entire site — from office and workshop equipment through to security systems and overnight operations — was powered solely by a diesel generator running continuously, 365 days a year.
The operational costs were substantial, the carbon footprint significant, and the business fully exposed to volatile fuel prices with no viable route to energy independence. A transformational solution was required.
Dropbox GES, in partnership with TLEK Electrical Services Ltd, designed and delivered a complete off-grid renewable energy solution tailored precisely to the operational demands of the site. No grid connection required. No compromise on reliability.
High-efficiency rooftop solar installation generating approximately 25,500 kWh annually. Designed to fully charge the BESS on an average summer day and deliver meaningful daytime load coverage across all seasons. Summer generation significantly exceeds site demand, creating a daily surplus.
The SMARTESS-30-60kW/100kWh lithium energy storage system stores solar generation throughout the day, delivering reliable power through the evening and overnight periods. The BESS covers the full overnight site load within its 80% depth-of-discharge operating window without grid dependency.
A 50kW inverter manages intelligent conversion between DC stored energy and AC site power, rated to handle the full peak site demand of 10kW with substantial headroom. Ensures seamless, uninterrupted power delivery under all load conditions including simultaneous workshop and office operation.
Design & Installation: TLEK Electrical Services Ltd — The full electrical design, system engineering, and physical installation of this project was led and executed by TLEK. All works are compliant with BS7671 18th Edition Wiring Regulations, commissioned and signed off on site by a qualified engineer.
The system operates across two distinct seasonal modes. Summer delivers genuine solar surplus, fully charging the BESS and exceeding site demand. In winter, an intelligent protocol deploys the diesel generator as a last-resort safety net — activating only when battery state of charge falls below 20%, charging back to 40%, then shutting down.
From day one of operation, the transformation in energy costs, carbon output, and operational resilience has been measurable, sustained, and significant.
Documented from commissioning through to full operational deployment at the Pennington Haulage facility, Northwest England.
The current system has already eliminated over 98% of diesel consumption. A modest second-phase investment in additional solar PV capacity would eradicate diesel dependency entirely — delivering true zero-emission, off-grid energy independence year-round, with existing BESS and inverter infrastructure already in place.
The engineering force behind this project.
TLEK Electrical Services Ltd didn't just install this system — they designed it, engineered it, and made it work. From initial site assessment and system specification through to full commissioning and sign-off, every element of the electrical design and physical installation was led by Tommy and his team.
TLEK are a fundamental part of the Dropbox GES operation. A trusted partner who brings deep technical expertise, commercial reliability, and genuine commitment to every project. When it matters, Tommy has our back — and that's not something we say lightly.
"Tommy and the TLEK team are the reason this project delivered. The design thinking, the installation quality, and the attention to how this system actually performs in the real world — that's all them. We don't just work together, we build together."
Dropbox Green Energy Solutions is a UK specialist in off-grid and hybrid renewable energy systems for commercial and industrial clients. We supply, integrate, and support battery energy storage, solar PV, and intelligent energy management solutions — enabling businesses to eliminate diesel dependency, reduce costs, and achieve genuine energy independence.
Our systems are engineered for demanding real-world environments. From haulage yards and logistics facilities to agriculture, manufacturing, and remote infrastructure — we deliver solutions built to perform and deliver measurable returns from day one. We work exclusively with trusted engineering partners like TLEK to ensure every installation is delivered to the highest standard.
Whether you operate fully off-grid today or want to reduce your reliance on the grid, our team will design a system around your exact energy profile. No two sites are the same — and neither are our solutions.