| What it does | Independent calculator to check if a home battery pays for itself in your situation
| Ascendant calculator for Italy and the world with IANA timezone conversion and historical rules
|
|---|
| Stage | Not given
| Not given
|
|---|
| Founded | Not given
| Not given
|
|---|
| Based in | NL
| IT
|
|---|
| Pricing model | Free
| Free
|
|---|
| Pricing | Not given
| Not given
|
|---|
| Key features | - Compares battery models from 23 brands on payback time and net result after 15 years
- Calculates with real hourly EPEX prices for dynamic energy contracts
- Processes the end of net metering from 1 January 2027
- Provides negative buying advice if purchase is not worthwhile
- No account or email required
- Generates 10-page PDF advice report with lowest prices from 11 shops
- Free 22-page PDF handbook about home batteries
- Analyzes consumption and solar generation hour by hour for full year
- Three scenarios: pessimistic, most likely and optimistic outcomes
- Updates prices from 11 online shops every morning automatically
| - IANA timezone conversion with historical rules for accurate local to UTC conversion
- Supports over 7,800 Italian cities and 165,000 global cities
- Shows margin of error with ±15, ±30, or ±60 minute options
- Multi-level personalized reading including base description, decan analysis, and sun-ascendant synthesis
- Daylight saving time automatically applied based on historical rules for location and date
- All calculations processed locally in browser with no data sent to external services
- Cusps warning to alert when result is near a zodiac sign boundary
- Monthly table tool for quick checks across different times and signs
- Combined moon and ascendant calculator in one tool
- Chrome extension for quick ascendant checks from the browser
|
|---|
| What makes it different | - Truly independent: sells no batteries, has no arrangements with installers, publishes negative buying advice
- No personal data collection: zero signup required, immediate results without email
- Built from personal need: creator did his own calculations after a misleading sales pitch
- Comprehensive research: 384 example households analyzed in 26,112 calculations
- Shows all calculation assumptions: transparent methodology with public data sources
| - Transparent about uncertainty: displays margin of error and warns when result is near sign boundaries
- Uses reliable IANA timezone database with historical rules, not approximations
- Privacy-first: all computation happens locally in the browser without storing or sending personal data
- Clear explanations of calculation method, limits, and how to interpret results
- Independent project maintained transparently by a single developer
|
|---|
| Community votes | 0 | 0 |
|---|
| DR (Domain Rating by Ahrefs) | 16 ● no change since last check | 20 ● no change since last check |
|---|
| Trust Flow (Majestic) | 18 | 8 |
|---|
| Citation Flow (Majestic) | 24 | 23 |
|---|
| Referring domains (Majestic) | 18 | 53 |
|---|
Eerlijk over Thuisbatterijen
AstroCalcolo