NAPIT
CHAS
City & Guilds
TrustMark
Part P
BS 7671Store your solar energy. Use cheap overnight electricity. Never waste a kilowatt again. Professional installation across Mid Somerset.
The UK energy market has changed. Smart homeowners are taking control.
Without a battery, a typical solar home self-consumes only 30-50% of generation — the rest is exported at 4-15p/kWh. With battery storage, self-consumption rises to 70-85%. You use your own solar power in the evening instead of buying it back from the grid at 24.5p/kWh. The saving is immediate and significant.
On tariffs like Octopus Go (7.5p/kWh overnight), Intelligent Go, or Agile, charge your battery at rock-bottom overnight rates and discharge during peak hours (24.5p+). A 9.5kWh battery cycling daily between cheap and peak rates saves approximately £600-£900 per year on electricity alone, even without solar panels.
Systems with Emergency Power Supply (EPS) functionality keep essential circuits running during grid outages. GivEnergy EPS switches over in under 20ms. Tesla Powerwall provides seamless whole-home backup via Gateway 2. We configure your backup circuits during installation — typically covering lights, fridge-freezer, broadband router, and phone chargers.
With the Smart Export Guarantee, sell excess stored energy back to the grid at 4-15p/kWh depending on your supplier. Some advanced tariffs like Octopus Flux pay premium export rates during peak demand windows (15-20p/kWh). Your battery becomes an active revenue source, not just a storage device.
UK energy prices have risen 54% since 2021 and show no sign of stabilising. As time-of-use tariffs become the default (the smart meter rollout is driving this), battery storage becomes more valuable every year. LFP batteries are rated for 6,000+ cycles (approximately 15-20 years of daily use), meaning your investment outlasts multiple energy price cycles.
Battery storage installed alongside solar PV, or retrofitted to an existing solar system, qualifies for 0% VAT under the Energy Technology Criteria List. This applies to residential properties only. Standalone batteries without solar are subject to 20% VAT. We can advise on the most tax-efficient installation approach for your situation.
NAPITCHASCity & GuildsTrustMarkPart PBS 7671
Battery storage systems integrate directly with your consumer unit. Clean installation, fully certified, built to last.
We only install reliable systems from manufacturers with track records.
The UK's most installed home battery system. Lithium Iron Phosphate (LFP) chemistry for maximum lifespan, thermal stability, and safety. No cobalt, no thermal runaway risk. The GivEnergy ecosystem integrates battery, hybrid inverter, and monitoring into one seamless platform.
13.5kWh of storage with seamless whole-home backup power via the Tesla Gateway 2. The Powerwall is an AC-coupled system, making it ideal for retrofitting to existing solar installations or standalone deployment. Industry-leading Tesla app ecosystem with Storm Watch weather integration.
High-voltage modular battery system that scales precisely to your needs. Start small and expand later. BYD is the world's largest battery manufacturer — their HV series is the backbone of commercial and residential storage across Europe.
Excellent value hybrid inverter and battery system from one of the UK's fastest-growing solar brands. Fox ESS offers a fully integrated solution at a competitive price point, with comprehensive monitoring and smart tariff integration.
Designed to pair with SolarEdge's panel-level optimisation system. The SolarEdge Home Battery provides DC-coupled storage with the industry's best per-panel monitoring and maximum energy harvest from partially shaded roofs.
Understanding the technology helps you choose the right system. Here is what matters.
DC-coupled systems (GivEnergy, Fox ESS, SolarEdge) connect the battery directly to the solar panels via a hybrid inverter. Solar DC power charges the battery without converting to AC first, giving higher efficiency (typically 95-97%). Best for new solar + battery installations.
AC-coupled systems (Tesla Powerwall) connect to your existing AC circuit. Solar panels still use their existing inverter. The battery has its own built-in inverter. Slightly lower round-trip efficiency (88-92%) but ideal for retrofitting to existing solar without replacing the inverter.
A hybrid inverter performs two jobs: it converts solar DC power to AC for your home, AND it manages battery charging and discharging. This replaces the need for a separate solar inverter and battery inverter, reducing cost and complexity.
GivEnergy, Fox ESS, and SolarEdge all use hybrid inverters. The inverter continuously monitors solar generation, household demand, battery state of charge, and grid conditions — making real-time decisions about where to route power for maximum savings.
LFP (Lithium Iron Phosphate) is now the standard for home batteries. Advantages: 6,000+ cycles (vs 3,000 for NMC), zero thermal runaway risk, no cobalt, wider operating temperature range, and longer warranty periods. All systems we install use LFP chemistry.
NMC (Nickel Manganese Cobalt) was common in older systems but is being phased out for residential use due to shorter lifespan and thermal management requirements.
Batteries must be installed on a structurally sound wall or floor (GivEnergy: 114kg, Tesla: 114kg). Minimum ventilation clearances must be maintained per manufacturer specifications (typically 150mm on all sides). Operating temperature range varies by product — most are rated for garages and outbuildings but some require protection from sustained sub-zero temperatures.
Electrical requirements: dedicated circuit from consumer unit, appropriate RCD protection, and DNO notification for systems with export capability. We handle all of this as part of the installation.
Solar + battery: Typical payback 5-8 years. A 9.5kWh battery paired with a 4kW solar array saves approximately £800-£1,200 per year through increased self-consumption and tariff arbitrage. System cost of £4,500-£5,500 pays back in 4-7 years.
Standalone battery (no solar): Typical payback 6-9 years. Pure tariff arbitrage on Octopus Go saves approximately £600-£900 per year. Rising energy prices shorten the payback period each year.
GivEnergy: 12 years covering battery capacity retention above 80% and all components. Unlimited cycles within warranty period.
Tesla: 10 years, unlimited cycles, minimum 70% capacity retention. Gateway 2 covered under same warranty.
BYD: 10 years, 6,000 cycles, minimum 80% capacity.
Fox ESS: 10 years on battery and inverter, 6,000 cycles.
All installations also carry our 12-month workmanship guarantee and are registered with NAPIT for Part P compliance.
Commercial battery storage delivers immediate cost savings through peak shaving, demand management, and backup power — often with better ROI than residential systems.
Many commercial electricity contracts include maximum demand charges (kVA). Battery storage discharges during peak demand periods to flatten your load profile, reducing your maximum demand charge by 20-40%. For businesses paying £30-50/kVA/month, this alone can justify the investment.
Commercial battery systems with EPS functionality provide seamless backup power for critical infrastructure: servers, EPOS systems, refrigeration, security systems, and emergency lighting. More cost-effective and longer-lasting than traditional UPS systems, with the added benefit of daily energy savings.
Commercial premises typically operate 8-12 hours per day but solar generates for 6-10 hours. Battery storage captures surplus weekend and early morning generation, increasing solar self-consumption from 40% to 80%+. Combined with business rates relief on solar (up to 100% exemption), the financial case is compelling.
From enquiry to generating savings in as little as 2 weeks.
We assess your energy usage, existing solar (if any), and recommend the right system size. No obligation, no pressure.
We model your specific property to optimise battery size, predict savings, and choose the best equipment for your situation.
NAPIT-approved installation to BS 7671 standards. Typically completed in one day. Full commissioning and testing included.
We configure your inverter, connect the monitoring app, set up charging schedules, and walk you through everything. Full certification issued.
Free consultation. No obligation. Honest advice on whether battery storage is right for your property.
Direct Dan Stevens, Director: 07889 334849 Dan Street, Director: 07983 106928