62 calculators · 2 languages · DACH datasets
SolarExact
Solar and off-grid calculators with disclosed formulas and verified data. Every assumption visible, every number checkable — and the calculator tells you whether your result is compliant.
The DACH specialist calculators — built on data others don't maintain
- Balcony solar calculatorGerman 800 W rules checked (as of 03/2026), vertical-railing yield computed hourly — not from a flat lookup table.
- Solar payback calculatorPayback with the real EEG rates after the 1 Aug 2026 degression — simple and discounted.
- Feed-in tariff calculatorFeed-in revenue with proportional tiering (7.70/6.66/5.44 ct) and an hourly 60 % cap.
- Is a home battery worth it?Storage economics against three binding limits — with market prices refreshed quarterly.
All calculators by topic
12 Calculators
System sizing
- Daily power consumption calculator
- Solar panel size calculator
- Battery bank size calculator
- Size an inverter
- Size a charge controller
- Battery charge time calculator
- Calculate battery runtime
- Size a generator for a hybrid system
- 12, 24 or 48 volts? — choosing a system voltage
- Calculate string configuration
- Voc temperature correction calculator
- Calculate system losses as a chain
10 Calculators
Electrical & safety
- DC wire size calculator
- AC wire size calculator (installation chain)
- Calculate voltage drop
- Size a DC fuse or breaker
- Size an AC circuit breaker
- Calculate ampacity with derating
- Estimate a busbar
- Calculate protective earth conductor (building and boat)
- Size the battery to inverter cable
- Wire batteries in parallel
10 Calculators
Yield & geometry
- Calculate peak sun hours
- Optimal solar panel angle calculator
- Solar panel orientation loss calculator
- Calculate row spacing
- Monthly solar output calculator
- Annual solar output calculator
- Calculate temperature losses of solar panels
- Calculate sun position, sunrise and sunset
- Calculate panel count for your roof
- Estimate snow and wind loads
8 Calculators
Battery
10 Calculators
Economics
- Solar payback calculator
- Levelised cost of energy calculator
- Self-consumption and self-sufficiency calculator
- Is a home battery worth it?
- Grid connection or off-grid? Compare costs
- Generator or solar? — cost comparison
- Check solar system cost (quote checker)
- Feed-in tariff calculator
- Solar CO₂ savings calculator
- Model electricity price growth and present value
10 Calculators