CONSIDERED TOOLKIT
Tools to help you decide
Independent tools built to help you make better-informed decisions. Our free tools stay completely free for everyone, with no account or membership required. Separate premium tools may be bought individually or included with an eligible Considered membership.
SOLAR & BATTERY
Size a system, compare it, and check the payback
Start with a rough estimate, then either the low-commitment DIY plug-in route or the full sizing/comparison/investment path for a proper installed system.
Home Battery Savings Calculator
See how much a home battery could save by charging on cheap electricity and using that energy later. Compare battery sizes and allow for real-world losses and degradation.
Open tool →Home Energy Quick Estimate
Don't have your bills or a quote to hand? Answer four quick questions and get a rough solar and battery payback estimate with typical UK assumptions filled in for you.
Open tool → New · 30 Aug 2026Solar Annual Generation Estimator
Estimate how much electricity a solar array could generate each year using your location, roof direction, pitch, mounting type, system losses and inverter size. It uses NASA POWER climate data with a separate UK benchmark for context.
Open tool →Plug-In Solar Payback Calculator
New from 27 August 2026: plug-in solar is legally recognised in Great Britain. See whether a DIY plug-in kit is actually worth it for your region, occupancy and kit size.
Open tool →Solar & Battery Size Finder
Not sure what size solar array or battery you need? Answer questions about your usage, when you're home and your goals to get a sizing range to take to installers.
Open tool →Home Battery Comparison Tool
Compare up to six home battery systems side by side by installed cost, usable storage, power output and expansion cost, then see which best suits your household.
Open tool → New · 11 Aug 2026Battery Price Checker
Enter one battery's price and capacity and see its £/kWh benchmarked against known reference systems — a quick sanity check without running the full comparison tool above.
Open tool →Home Energy Investment Calculator
Model solar panel and home battery payback using your own tariff and quote, then compare the same upfront money invested elsewhere instead.
Open tool →Solar Panel & Microinverter Compatibility Checker
Check whether a solar panel or panel array appears electrically compatible with a microinverter — voltage, current, power and start-up, plus a separate UK Plug-In Solar status check.
Open tool →GRID CONNECTION & COMPLIANCE
G98 / G99: check your threshold, then submit
These two work as a pair — check which registration route applies to your setup, then use that to put together your actual DNO paperwork.
G98 / G99 Export Limitation Checker
Add up your solar, battery and other export-capable kit to check G98 vs G99 — plus an honest, separate answer to what an EV charger or heat pump actually means for your connection.
Open tool →G98/G99 Submission Generator
A DIY organising aid: turn your installation details into a draft submission summary and an auto-generated system diagram — not a verified, compliant submission or a system-designer replacement.
Open tool →ENERGY BILLS & RUNNING COSTS
What you're actually paying, day to day
Compare electricity tariffs, and work out the real running cost of an EV or a heat pump versus what you've got now.
Octopus Energy Tariff Comparison
See every Octopus Energy electricity tariff currently available for your region, ranked by estimated annual cost using live pricing pulled straight from Octopus.
Open tool →EV vs Petrol & Diesel Cost Calculator
Work out whether an electric car actually costs less once a home charger, realistic charging costs, road tax and the 2028 pay-per-mile charge are included.
Open tool →Heat Pump Running Cost Calculator
Heat pump vs gas boiler, honestly: real-world SCOP ranges instead of marketing figures, your actual gas usage, current price cap rates and the Boiler Upgrade Scheme grant.
Open tool →HOME & GARDEN
Choose technology that actually suits your home
Practical decision tools for home and garden technology — starting with robot mowers, where lawn size is only part of the story.
PERSONAL FINANCE
General money tools, not solar-specific
Not about energy at all — how long your savings would actually last, what a purchase will really cost you, and what a side hustle really earns once everything's accounted for.
Financial Resilience Planner
See how long your money could last if things got harder, and how paying off debt, building savings or changing income would actually change that — private, runs entirely in your browser.
Open tool →Should I Buy This?
Work out what a purchase will really cost — total cost, cost per use, financing cost — then compare it against buying used, keeping what you have, repairing or renting. No verdict, just the numbers.
Open tool →Is My Side Hustle Worth It?
Work out what a side hustle really earns after costs, vehicle wear, UK tax and your total time — not just the headline hourly rate. Private, runs entirely in your browser.
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