Our services
SOLAR PANELS AND BATTERY STORAGE
Whether you want lower electricity bills, to earn money by exporting to the grid, to cut your carbon footprint or to move away from gas completely, we design each system around how your household uses electricity.
From just
Panel output
year product warranty
Days for a typical installation
THE EQUIPMENT WE RECOMMEND
We mainly install Sigenergy systems. Their inverters range from 3 kW to 12 kW, the batteries are modular so they are easy to handle and add to later, and the monitoring app is excellent, all at a mid-range price.
For larger systems, or where panels face more than two directions, we recommend SolarEdge. A power optimiser behind each panel keeps every panel working at its best and allows more panels on each string, with less equipment. SolarEdge can also manage smart plugs, hot water diverters, home backup and EV charging from one system.
If you are re-roofing or building new, Solfit in-roof panels sit level with your tiles for a neat finish, as long as the roof itself is level. Every installation includes Fastensol bird protection, a strong black mesh that clips securely around the panel frames.
A standard solar system switches off in a power cut. For backup power we fit a gateway so your battery can keep the house running. On new builds we can put your essential circuits on a separate board, and because a battery can only supply so much power at once, very heavy loads may need to be switched off so the important circuits run for longer.
SOLAR PANELS & BATTERY STORAGE
Explore the options for your roof, your land and the way you use electricity.
CIRCUIT IDENTIFICATION
We often encounter commercial distribution boards with missing circuit identification, several circuits grouped under one RCBO, and no available drawings, circuit schedules or test records.
We investigate the arrangement, identify what each circuit supplies and assess whether circuits need separate protection. We then make the agreed improvements and leave clear labels, updated schedules and the relevant certification.
CLEAR RECORDS AT HANDOVER
A well-finished distribution board should leave the next electrician with clear, useful information.
We provide circuit descriptions identifying what each circuit supplies, supported by the relevant inspection and test records. An up-to-date schedule at the board helps future electricians trace circuits, plan isolation and carry out maintenance more efficiently.
Accurate records reduce unnecessary investigation and disruption. Circuit identification is still verified before work begins.
Arrange a Distribution Board Survey
MODERN PROTECTION, ROOM TO GROW
Following an EICR, we replaced this office’s existing distribution board with a modern installation featuring individual RCBO protection and surge protection.
RCBOs protect against overloads, short circuits and earth leakage. Individual protection helps limit an earth-leakage fault to the affected circuit, reducing disruption to the rest of the premises.
Solar and battery systems can change the direction of power flow. We select suitable manufacturer-approved protective devices where bidirectional operation is needed and check compatibility with the board.
Surge protection helps reduce the risk of damage to computers, controls and other sensitive equipment from brief voltage surges. We assess the installation to select the appropriate protection, including any additional measures required.
We size and specify the new board around your current needs and anticipated additions, allowing spare ways where practical. We also assess supply capacity and expected loads for future equipment, EV charging, solar or batteries.
PLANNED AROUND YOUR OPERATIONS
We confirm the agreed shutdown, affected areas and equipment your team needs to shut down. Initial checks and testing help identify existing issues.
We isolate and verify the installation is safe to work on, accounting for additional supplies such as solar, batteries or generators.
We fit the specified board, arrange and terminate the wiring, install appropriate protection and clearly label the circuits.
We inspect and test the work, record the results and restore circuits in a controlled sequence. Existing defects or additional work are explained and agreed with you.
We provide the Electrical Installation Certificate, circuit schedules and operating information, leaving clear records for future maintenance.
Timing depends on the board size, number of circuits and condition of the installation. We agree the expected power-off period in advance, with out-of-hours working available by arrangement.
Arrange a distribution board surveyCOMMERCIAL SOLAR • SURREY, HAMPSHIRE & SOUTH WEST LONDON
Turn unused roof space into electricity for your business. We design commercial solar around your building, your energy use and your plans for the future.
NICEIC Approved Contractor
MCS certified
RECC member
TrustMark registeredA PRACTICAL INVESTMENT IN YOUR PREMISES
For businesses using electricity during daylight hours, solar can offset part of that demand as it is generated. The right system starts with understanding when you use power—not simply filling every available space with panels.
We review your electricity bills, available roof area and site conditions, then explain the expected generation, on-site use and financial return with clear assumptions.
Find out what your roof could generate ↗Generate power on site to meet part of your daytime demand.
Compare generation and savings against your actual consumption.
Reduce reliance on grid electricity with renewable generation.
THE RIGHT SOLUTION FOR YOUR BUILDING
From an existing warehouse roof to a planned roof refurbishment, we assess the practical options before recommending a system.
Systems for suitable pitched and flat roofs, designed around shading, access, roof condition and available space.
Explore an integrated approach to solar and roof refurbishment, subject to structural assessment and site suitability.
Explore solar overcladding ↗Assess whether storing electricity for later use makes sense for your demand profile. Backup can be considered where specifically designed.
Explore commercial batteries ↗
THE EQUIPMENT BEHIND YOUR SYSTEM
AIKO’s All Back Contact cell technology places the electrical contacts behind the cell, leaving more of the front surface available to absorb sunlight. Its high-efficiency panel ranges offer a useful option where roof space matters.
We select the panel size and specification to suit your roof, mounting system and inverter design—considering output, weight and layout together.
SOLAREDGE COMMERCIAL THREE-PHASE INVERTERS
SolarEdge’s commercial inverters work with compatible power optimisers at the panels. This helps manage differences in panel performance and offers flexibility when designing larger arrays.
Panel-level monitoring helps identify underperforming parts of the system and supports more targeted fault finding. For larger projects, the modular Synergy range provides a scalable three-phase option.
SIGENERGY COMMERCIAL THREE-PHASE INVERTERS
Sigenergy’s commercial inverter range converts solar generation into three-phase power for your premises. Built-in energy management and support for multiple inverters make it an option for larger commercial installations.
We choose the appropriate inverter around your roof layout, array capacity and grid connection. If battery storage forms part of your plans, we assess the suitable hybrid equipment and storage configuration separately.
START WITH YOUR ROOF AND YOUR ELECTRICITY USE
Send us your electricity bills and tell us about your building. We can assess the opportunity and arrange a survey to establish what is practical.
Request your solar assessment ↗Site-specific estimates, with the assumptions explained.
BUILT AROUND YOUR OPERATIONS
Make use of suitable roof space and assess demand from lighting, handling equipment and operations.
Match generation with daytime use from workspaces, ventilation and building services.
Consider opening hours, seasonal use and how much generation the building can use.
Assess machinery loads, working patterns and the wider electrical infrastructure.
DESIGN, INSTALLATION & LONG-TERM SUPPORT
Commercial solar needs to work with the rest of your installation. We consider distribution boards, cable routes, metering, protection and future additions as part of the design.
We manage the agreed scope from survey and DNO application through installation, commissioning and handover. Monitoring and maintenance options help you keep track of performance after installation.
Talk to us about your building ↗FROM FIRST SURVEY TO HANDOVER
Review bills, operating hours, roof space and your objectives.
Check roof condition, access and the structural assessment required.
Develop the layout, generation estimate and electrical design, and manage the DNO application.
Agree access, working arrangements and any necessary shutdowns.
Commission the system and provide certification, monitoring guidance and handover records.
YOUR QUESTIONS, ANSWERED
We assess its condition, construction, shading and usable space. A structural assessment establishes whether it can support the proposed system. Roof repairs or refurbishment may need to be considered first.
That depends on system generation, how much electricity you use on site, your import tariff and any export income. We explain the assumptions rather than promise a fixed percentage saving.
We plan access and work areas with you. Any shutdown needed for the electrical connection is agreed in advance, with out-of-hours work available by arrangement.
A standard grid-connected solar system shuts down during a grid outage. Backup requires a specifically designed system with suitable storage, switching and protection.
LET’S ASSESS THE OPPORTUNITY
Tell us about your premises and have your electricity bills ready. We’ll help establish whether commercial solar is a good fit.
COMMERCIAL BATTERY STORAGE
Make more of your solar generation, assess cheaper charging periods and manage when your business draws electricity from the grid.
Arrange a commercial battery survey ↗DESIGNED AROUND YOUR ELECTRICITY USE
The right system starts with your electricity bills and demand profile. We assess how much energy you use, when you use it and whether storage can make a practical difference.
Commercial batteries can work alongside solar or form part of a grid-charged installation. We compare the options before recommending capacity, inverter power and controls.
Store surplus generation for later use instead of exporting it immediately.
Where tariffs make it worthwhile, charge at lower rates and discharge during more expensive periods.
Use a suitably rated battery and controls to reduce selected grid-demand peaks. Savings depend on your tariff and load profile.
CAPACITY AND POWER ARE DIFFERENT
Battery capacity indicates how much energy it can hold. Usable energy can be lower than the rated capacity and depends on reserve settings.
Inverter and battery power determine how much demand can be supported at once. A large battery does not automatically provide a high output.
We assess both against your actual demand, allowing for losses, operating limits and any backup reserve.
SIGENERGY SIGENSTACK
SigenStack uses approximately 12 kWh battery modules combined with compatible Sigenergy commercial hybrid inverters and battery controllers. Its modular format allows the system to be configured around the site’s requirements.
We assess the appropriate module quantity, inverter power and installation position, rather than treating a single battery module as a complete system.
Example product family • Module specification: 12.06 kWh rated energy • Final configuration confirmed during design
SOLAX TRENE
The SolaX TRENE-P100B215 combines 215 kWh of battery storage with a 100 kW power conversion system in an air-cooled commercial cabinet.
Its integrated energy-management system supports scheduled charging and discharging. We assess your demand profile, available space and grid connection to establish the appropriate operating strategy.
Example system • 215 kWh battery capacity / 100 kW rated output • Backup arrangements assessed separately
ILLUSTRATIVE BUSINESS SCENARIOS
Store midday surplus for late shifts, evening lighting or other demand after solar production falls. We first check whether a genuine surplus is available.
Assess stored energy for the busy service period and size inverter power around the peak to be reduced. Batteries do not replace a required supply upgrade.
Compare charging windows with daytime demand, electricity prices and battery losses to establish whether tariff shifting offers value.
These are examples of potential applications, not completed Big Green Electrical projects or guaranteed savings.
BACKUP IS A SEPARATE DESIGN DECISION
A battery installed for savings does not automatically keep a building running when the grid fails. Backup requires suitable equipment, changeover arrangements, earthing and protection.
We identify the essential circuits, running loads, motor starting requirements and required duration, then assess an appropriate backup solution. Some installations may need a dedicated essential-loads board or load shedding.
Discuss your backup requirements ↗FROM FIRST REVIEW TO HANDOVER
Electricity bills, half-hourly data where available, tariffs, solar generation and future plans.
Space, access, ventilation or cooling, fire-safety considerations, electrical capacity and proposed controls.
Relevant DNO applications, agreed working arrangements and any necessary shutdowns.
Testing, certification, monitoring, operating settings and maintenance guidance.
YOUR QUESTIONS, ANSWERED
Not necessarily. A suitably designed system can charge from the grid. The financial case depends on your tariff, demand pattern, losses and battery costs.
Often, but compatibility and electrical design need checking. We assess AC-coupled and compatible DC-coupled options.
We model your actual usage and tariff rather than promise a fixed saving. The proposal should explain assumptions, usable capacity, losses and operating strategy.
Some systems are modular, but expansion depends on the inverter, controls, manufacturer limits, site space and grid agreement.
START WITH YOUR ELECTRICITY BILLS
Tell us about your premises, current solar system and energy priorities. We’ll help assess the opportunity.
Request a commercial battery assessment ↗COMPLETE SUSTAINABLE ENERGY SOLUTIONS
We visit your site to understand the opportunities and possible challenges of your installation. We’ll discuss your current and future energy needs. We review structures, layout, and access so our recommendations are practical.
Our quotes are thorough and comprehensive. Once you agree the specification your quoted price is what you pay. You’ll also have realistic projections of your return on investment.
Every installation has its own limitations and challenges. We design a solution to deliver the best results and provide great value for money.
We’ll work with you to plan a programme of work that’s safe and efficient and which minimises disruption to your operations.
Solar panels don’t require a lot of maintenance, but regular inspections help to optimise performance. You can plan repairs and replacements to keep everything running smoothly.
Need more information
While solar panels perform best when it’s sunny, they can generate energy in both direct and indirect sunlight.
All properties differ, which is why it’s important to design specifically for your needs. Suitability depends on the slope and direction of your roof, as well as your energy needs. When we visit your property, we’ll assess the possibilities and challenges and give you realistic and honest recommendations.
A solar PV installation reduces dependence on energy from the National Grid, helping to reduce bills and your carbon footprint. It’s increasingly affordable to install solar panels, and you will have back-up power if there’s any disruption to your energy supply.
Storing excess electricity from your solar energy installation means you can use it later. This is often useful if you have peak periods for energy use or operate outside normal working hours. Overall, the benefits of battery storage depend on how much energy you use and when.
Big Green Electrical
Expert installation from a team you can trust, backed by leading manufacturers and recognised industry standards.
Certified installer
Approved installer
Approved installer
Consumer protectionRenewable Energy Consumer CodeCertified contractorApproved ContractorQuality workmanship and consumer protection, from your first enquiry to installation and aftercare.
ABOUT US
Daniel Evans founded the Big Green Electrical Company in 2017. All engineers hold Level 3 City & Guilds qualifications in electrical installation and is further qualified in the Wiring Regulations (BS7671).
As qualified and experienced electricians the team helps you find the best green electrical options.
Qualified
We hold City & Guilds qualifications in electrical installation. As NICEIC approved contractors we’re regularly reviewed to confirm the quality of our work
Experienced
A proven track record in have successfully completing green energy projects
Knowledgeable
We stay up to date with the latest green energy developments and innovations
Solar Panels
Discover how integrated solar panels can cut electricity bills by up to 70%, work well under cloudy skies and add value to your home. Read one customer's story.
Solar Panels
Discover why partnering with an electrical contractor for your solar panel installation ensures expert service, bespoke solutions, and long-term support, all while contributing to a greener, more sustainable future.
Renewable Energy
Discover how solar panels can cut electricity bills by up to 70%, work well under cloudy skies and add value to your home. Read one customer's story.
Other SERVICES
Contact us today for a free quote from your local electrician located in Camberley, Surrey.
