Low-carbon heating and energy storage for Muswell Hill Sustainability Group members
Group Buy North London is working in partnership with Muswell Hill Sustainability Group (MHSG) to help members lower their carbon emissions, take control of their energy costs, and take meaningful climate action.
Your Offer
Congratulations on taking the next step towards a more energy-efficient home. As a registered participant in the North London Group Buy scheme, you now have access to exclusive group buy pricing on Solar PV and Battery Storage systems. By generating your own electricity — and optionally storing it for when you need it — you'll reduce your reliance on the grid and protect yourself from rising energy costs. while helping to support the inita
What's included in this offer:
- Solar PV System — DMEGC high-efficiency N-type panels with Fox ESS inverter
- Battery Storage — Fox ESS EP6 modular battery system (optional, multiple sizes available)
- Full installation by our MCS-certified installer, Sustain Homes
- All warranties — 25-year panel warranty, 10-year inverter warranty, 10-year battery warranty
- Ongoing support — Monitoring apps and aftercare
Your Solar PV & Battery Storage Offer — At a Glance
DMEGC Infinity RT Series (Solar PV) & Fox ESS EP6 (Battery Storage)
Generate, store, and use your electricity on your terms.
Adding battery storage means you capture excess solar energy during the day and use it in the evening when electricity is most expensive. Smart batteries can also charge from the grid during off-peak hours (e.g., overnight) and power your home during peak times — maximising savings even on cloudy days. Ideal if you're out during the day or want maximum energy independence.
DMEGG Infinity RT Solar Panels
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FOX ESS EP6 Battery Storage
Solar & Battery Storage Group Buy Prices
Technical Summary
High-efficiency panels
DMEGC N-type bifacial, 22.5% efficiency
Panel dimensions
1762mm × 1134mm (~2m²) per panel
Long warranties
25-year product, 30-year performance
Scalable battery
5.2 kWh to 15.6 kWh usable storage
Battery lifespan
LiFePO₄ chemistry, 6,000+ cycles
Smart monitoring
App-based control for solar and battery
Inverter efficiency
Up to 97.4% (Fox ESS)
Weather resistant
IP65 rated inverter, suitable for outdoor install
What's Included in Your Package
Every Group Buy North London solar package includes: Complete System Package DMEGC N-type bifacial solar panels (450W, sized to your home) Fox ESS inverter (Grid-Tied F-Series or Hybrid AC1 for battery systems) Fox ESS EP6 battery storage (if selected — 5.2 kWh to 15.6 kWh) Fastensol GS-Roof aluminium mounting system EnviroGuard bird mesh protection AC/DC safety isolators and generation meter All electrical wiring and connections to your consumer unit Handover pack, certificates, and warranties What's Included in Your Price 🏠 Home Assessment & Design A complete on-site roof survey, structural assessment, and system design by qualified surveyors are included in your Power Up Plan tailored offer. 🦺 Scaffolding & Safety All scaffolding hire, safety equipment, and site protection during installation — no additional costs to you. ☀️ Solar Panels & Mounting High-quality Tier 1 certified solar panels, roof mounting system, and DC optimisers or microinverters — all equipment included. 🔧 Professional Installation MCS-certified installer labour, project management, and site supervision throughout the installation process. ⚡ Electrical Components AC/DC safety isolators, generation meter, all electrical wiring, and connections to your consumer unit included. 🛡️ Certifications & Compliance MCS certification, electrical compliance, building control notification, and all required documentation. 📋 Comprehensive Warranties 25-year panel warranty, 30-year performance guarantee, 10-year inverter warranty, and 2-year workmanship warranty on all installation work. 💰 Smart Export Registration Smart Export Guarantee (SEG) registration assistance to ensure you get paid for excess electricity you generate. Warranties & Aftercare Your installation is protected by comprehensive warranty coverage: Coverage Duration Solar panel product warranty 25 years Solar panel performance guarantee 30 years (87.4% output) Inverter manufacturer warranty 10 years Battery manufacturer warranty (if applicable) 10 years Mounting system warranty 10 years Installation workmanship warranty 2 years ℹ️ Annual service reminders — Your installer can set up service reminders to help you maintain your system and protect your warranty coverage.
Mounting System — Fastensol GS-Roof
Professional aluminium mounting system for pitched roofs included is included in your solar package. Specification Detail Material Anodised aluminium Compatibility Tile, slate, and metal roofs Wind rating Compliant with AS/NZS 1170.2:2011 Warranty 10 years Installation Non-penetrating hooks for tile roofs Fastensol GS-Roof - Product Specification Fastensol Pitched Roof Mounting Equipment Datasheet.pdf
Bird Protection — EnviroGuard Mesh
All installations include bird mesh protection to prevent nesting beneath panels. Specification Detail Material Galvanised steel mesh + UV-stabilised clips Mesh size 12.5mm × 25mm Installation Non-penetrating clip system Purpose Prevents birds nesting, protects wiring EnviroGuard Mesh - Product Specification Birdguard.pdf
Home Size Example Packages
These packages show typical configurations based on home size. Your surveyor will recommend the right specification for your property. Package Solar Battery Ideal For You Pay Starter 8 panels (3.2 kWp) Grid-Tied 1–2 bed, lower energy use £4,840 Starter+ 8 panels (3.2 kWp) Small (5.2 kWh) 1–2 bed, evening usage £6,556 Popular ⭐ 10 panels (4.0 kWp) Medium (10.4 kWh) 3 bed semi-detached £8,014 Family 12 panels (4.8 kWp) Medium (10.4 kWh) 3–4 bed family home £8,273 Premium 16 panels (6.4 kWp) Large (15.6 kWh) 4+ bed detached £10,068 ⭐ Most popular configuration
YOUR INSTALLER & NEXT STEPS
Your Allocated Installer: Sustain Homes
Sustain Homes is rated 4.8 out of 5 on Trustpilot based on 750+ reviews
Sustain Homes is an awarding winning low-carbon technologies installer with extensive experience delivering air source heat pump installations across London and the South East. The company focuses exclusively on renewables projects and has a strong track record working in the types of homes commonly found across North London.
Sustain Homes has supported multiple group-buy schemes and brings significant experience in delivering high-quality installations at scale whilst maintaining excellent customer service.
As a member of the RetrofitWorks Co-operative Sustain has completed RetrofitWorks' full installer vetting process. All installations are delivered in line with our Quality Assurance Framework, providing oversight of technical design, installation quality, customer experience, and issue resolution.
Accreditations & Recognition
MCS Certified
Microgeneration Certification Scheme
TrustMark Registered
Government Endorsed Quality
RECC Member
Renewable Energy Consumer Code
Certified B Corporation
Verified social and environmental standards and value creation for impact driven businesses
RetrofitWorks Co-operative Member
Vetted & Approved Contractor. Governed by RetrofitWorks' Quality assurance standards and code of practice
Your Solar PV - DMEGC Infinity RT Series
Your system uses DMEGC N-type bifacial solar panels, manufactured by one of the world's leading solar companies with over 40 years' experience.
DMEGG Infinity RT Solar Panels
Panels Product Overview Video
Key Technical Specification - Solar Panels — DMEGC Infinity RT Series
Specification Detail Model DMxxxM10RT-B54HBB Power output 450W per panel Efficiency 22.5% Dimensions 1762mm × 1134mm × 30mm Weight 24.5 kg per panel Cell type N-type mono-crystalline (bifacial) Product warranty 25 years Performance warranty 30 years (87.4% output at year 30)
Warranties & Aftercare
Your solar installation is protected by comprehensive warranty coverage: Coverage Duration Solar panel product warranty 25 years Solar panel performance guarantee 30 years (87.4% output) Mounting system warranty 10 years Installation workmanship warranty 2 years
Why N-type bifacial panels?
Higher efficiency than standard panels Better performance in low light and high temperatures Can capture reflected light from rear side Lower degradation over time Certified for extended stress, salt mist, and ammonia corrosion N-type bifacial panels are popular because they combine the superior performance of N-type silicon (higher efficiency, less degradation from light, better heat tolerance) with the dual-sided energy capture of bifacial design, resulting in significantly higher overall energy yield, longer lifespan, and better reliability, especially in diverse conditions, making them a powerful upgrade over traditional P-type monofacial panels.
Your Battery — Fox ESS EP6 Range
Fox ESS is a leading UK battery storage manufacturer, holding over 35% market share in the domestic solar and storage sector. The EP6 is a high-performance, scalable battery system designed for UK homes, offering reliable energy storage with advanced safety features. A Fox ESS AC1 hybrid inverter is included in your solar & battery offer.
FOX ESS EP6 Battery Storage
Key Technical Specification - Battery Storage - Fox ESS EP6 Range
Specification Small (1x EP6) Medium (2x EP6) Large (3x EP6) X-Large (4x EP6) Usable capacity 5.2 kWh 10.4 kWh 15.6 kWh 20.8 kWh Nominal capacity 5.76 kWh 11.52 kWh 17.28 kWh 23.04 kWh Depth of discharge 90% 90% 90% 90% Round-trip efficiency ≥95% ≥95% ≥95% ≥95% Battery chemistry LiFePO₄ LiFePO₄ LiFePO₄ LiFePO₄ Dimensions per unit (W×H×D) 380 × 640 × 185 mm 380 × 640 × 185 mm 380 × 640 × 185 mm 380 × 640 × 185 mm Weight per unit 51 kg 51 kg 51 kg 51 kg Protection rating IP65 IP65 IP65 IP65 Operating temperature -10°C to 55°C -10°C to 55°C -10°C to 55°C -10°C to 55°C scroll to the right if you are viewing on a small screen
Key Features
- LiFePO₄ chemistry — Lithium iron phosphate cells offer superior safety, longevity, and thermal stability compared to other lithium-ion technologies. No risk of thermal runaway.
- 90% Depth of Discharge — Use up to 90% of the battery's nominal capacity, maximising the usable energy available to your home.
- IP65 rated — Fully weatherproof for indoor or outdoor installation, giving you flexibility in placement options.
- Scalable design — Start with a single 5.2 kWh unit and expand up to 20.8 kWh by adding additional battery modules in parallel.
- Floor or wall mounting — Flexible installation options to suit your property and available space.
What's Included
Every Group Buy North London battery storage package includes: Fox ESS EP6 battery module(s) (5.2–20.8 kWh usable capacity) Fox ESS AC1 hybrid inverter (sized to your system) Full electrical installation and commissioning Grid connection and DNO notification Smart monitoring setup (app and web portal) User training on system operation Handover pack, certificates, and warranties
Your Hybrid Inverter — Fox ESS AC1 Range
Every battery system includes a Fox ESS AC1 hybrid inverter, which manages the flow of electricity between your battery, your home, and the grid. Technical Specifications Specification Details Inverter models AC1-3.0-E / 3.7 / 4.6 / 5.0 / 6.0 Max output power 3.0 kW – 6.0 kW Max efficiency 97.8% Battery charge efficiency 98.5% Battery discharge efficiency 97.0% Protection rating IP65 Dimensions (W × H × D) 430 × 410 × 178 mm Weight 23 kg Operating temperature -25°C to 60°C Monitoring WiFi, LAN, 4G, GPRS (optional) Display LCD, App, Website Product Data Sheet FOX ESS Hybrid Inverter - Data Sheet.pdf Key Features High efficiency — Up to 97.8% conversion efficiency minimises energy losses. Remote monitoring — Monitor and control your system via smartphone app or web portal, with real-time insights into energy flows, battery status, and savings. Emergency backup (EPS) — Optional emergency power supply keeps essential circuits running during power cuts (up to 6 kW output). Grid services ready — Compatible with smart tariffs and future grid flexibility services. Quiet operation — Natural convection cooling with noise levels below 35 dB.
Warranties & Aftercare
Your installation is protected by comprehensive warranty coverage: Coverage Duration Battery manufacturer warranty 10 years Inverter manufacturer warranty 10 years Installation workmanship warranty 2 years User training Complete handover and training on system operation, monitoring app setup, and smart tariff optimisation. Annual service reminders Your installer can set up service reminders to help you maintain your system and protect your warranty coverage.
Power Up Plan v4.0