Tesskat EV Hub
Solar + Battery
Estimate UK solar size, battery size, installed cost, annual savings and EV charging benefit without subscriptions or provider call-backs.
Home energy planning
Solar, battery and EV charging estimate
Plan solar generation, battery storage, savings, payback and extra EV charging benefit. Clear estimate only — no subscription, no sales pressure, no provider call-backs.
Home assumptions
Use practical UK defaults, then adjust the estimate to your roof, tariff, battery and EV usage.
kWh per year. Typical UK homes vary widely depending on heating, appliances and EV charging.
Watts per panel. Modern panels are often around 400–450 W.
Battery and cost setup
Tariff from Settings
Using UK estimate — Standard UK estimate.
This calculator uses your saved import rate of 28p/kWh and export rate of 15p/kWh. You can still adjust the rates below for a one-off estimate.
For solar and battery estimates, Tesskat uses the saved peak import rate because most home usage happens outside the EV overnight charging window.
Scaffolding, paperwork, design, extras or installer overhead.
EV charging add-on
Your estimate
7 panels required
Battery & Solar Financial Model v2
£453 estimated annual benefit
Solar saving
£354
Export income
£52
Battery shifting value
£46
EV off-peak saving
£0
Solar should be assessed first. Battery value depends on tariff, home usage and export rate.
How this estimate works
Trust and installer checks
Before ordering solar, battery storage or an EV charger, check that the installer is properly certified, that product warranties are clear and that any required DNO/grid connection process is handled correctly.
• Use an MCS-certified installer for solar and battery work.
• Ask for written product warranties and workmanship warranty details.
• Confirm whether DNO/G98/G99 grid notification or approval is needed.
• Treat Tesskat EV Hub results as planning estimates, not final quotes.
Next best step
Continue your EV home setup
Use the connected tools to check your roof, charging cost, energy tariff and EV running costs before making a buying decision.
Next best step
Turn this estimate into a full EV home plan
Use your solar, battery and tariff result with the Home + EV Planner to compare the full setup: solar size, battery size, inverter, EV charger and EV ownership needs.
This model combines estimated solar self-use, export income, battery energy shifting and EV off-peak charging benefit. It uses your saved tariff from Settings, but it is still a planning estimate, not a certified quotation.
System size and roof check
Typical range: around 2–3 kWp for limited roof or lower usage.
Battery, EV and carbon impact
Simple multiple only; no inflation or discounting.
Cost breakdown
Planning estimate only. Real designs depend on roof area, orientation, shading, inverter limits, installer pricing, DNO/export constraints and a proper site survey.
Continue in Tesskat EV Hub
Turn home energy planning into the next decision
Use this estimate as a starting point for EV charging, ownership cost, route planning or future product support.
Upgrade path
Free now. Deeper planning later.
Free now
Live solar, battery, EV charging and payback estimate with shared Hub assumptions.
Pro later
Saved comparisons, tariff scenarios, battery-size comparisons and downloadable summaries.
Business later
Proposal-ready outputs, installer support, partner planning and commercial project support.