La tua isola — English
Size your off-grid solar system
Choose your country to start — hardware links and wiring-regulation references adapt to where you're building. Calculations stay the same everywhere.
United Kingdom
Full tool — free and paid plans
United Kingdom
Free sizing tool, £5 single-project or £20 Arcipelago unlimited plan, account sync and project history.
Rest of Europe
Free sizing, generic wiring-regulation guidance
Same calculations as the UK tool. Paid plans and account sync aren't available for these countries yet.
United States
Free sizing, NEC/AWG-specific engine
United States
NEC/AWG cable sizing, 120/240V inverter options, NEC 690 regulatory notes — free to use, no account required.