Independent Clean Energy Calculators for Your UK Location
Model real-world performance, grid independence, and financial returns for rooftop solar PV, home batteries, heat pumps, and EV charging using empirical weather and network tariff data.
Over 30% Solar Generation Variance Across the UK
National rule-of-thumb averages fail to reflect local conditions. A typical 4 kWp domestic rooftop PV array produces around 4,300 kWh/year along the sunny South Coast of England, compared to approximately 3,300 kWh/year in Northern Scotland. Across 25 years of operation, regional irradiance and network distribution charges create significant variations in self-consumption value and Smart Export Guarantee (SEG) revenues.
Hyper-Local Geodata
Automated calibration of solar irradiation, heating degree days, and distribution network tariffs by town and postcode.
Engineering-Grade Calculations
Physics-based thermodynamic modeling without sales bias or inflated installer markups.
Clear UK Framework
Evaluate real payback periods including 0% VAT relief and £7,500 Boiler Upgrade Scheme (BUS) grants.
⚡ Clean Energy Calculators
Select a category for location-calibrated modeling and payback estimates:
Solar & Photovoltaic (PV)
Solar yield, SEG export & battery sizing
Heat Pump Calculator
Heating load (HDD) & seasonal efficiency (SCOP)
Home Battery Storage
Storage capacity, cycles & self-consumption
Grid Independence
Independence from retail utility rates
Gas Boiler vs Heat Pump
Boiler Upgrade Scheme & fuel cost comparison
EV Home Charging
Home charging speeds & solar off-peak tariffs
📍 Regional Clean Energy Hubs
Select a tool focus and choose your city or metropolitan area:
🔬 Open Data & Scientific Sources
No commercial bias or inflated installer claims: Our calculations rely on verified public energy and meteorological databases:
Solar Irradiance Datasets
High-resolution satellite irradiance and photovoltaic performance data calibrated for the British Isles.
Heating Degree Days (HDD)
Regional baseline temperature records to calculate accurate residential space heating loads and seasonal heat pump SCOP.
Energy Price Cap & Tariffs
Official retail unit rates, standing charges, and regional distribution network operator (DNO) DUoS charges.
Industry Standards
Microgeneration Certification Scheme (MCS) sizing formulas, battery cycle metrics, and UK Standard Assessment Procedure models.
❓Frequently Asked Questions
Key details on our UK data sources, calculation models, and Ofgem standards:
Is GridKalk UK completely free to use?▼
Does GridKalk UK pass my contact details to solar or heat pump sales reps?▼
Are GridKalk calculation results independent and impartial?▼
How is my privacy protected during calculation?▼
Do I need to create an account or provide personal details?▼
Where do the UK climate and tariff datasets come from?▼
What level of self-sufficiency can I achieve with solar, battery storage, and a heat pump?▼
Suggestion or Feature Request?
Are you missing a specific calculation, UK regional metric, or export tariff? We welcome any feedback from homeowners and energy professionals.
Report an Issue
Did you spot an inaccurate calculation, incorrect town data, or broken link? Let us know directly so we can patch it immediately.
