| What it does | Free ecommerce calculators for profit margin, CAC, LTV, pricing, Shopify fees, and more
| Independent calculator to check if a home battery pays for itself in your situation
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| NL
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| Pricing model | Free
| Free
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| Key features | - Profit Margin Calculator to calculate profit after all costs and fees
- CAC Calculator to measure customer acquisition cost
- LTV Calculator to understand customer lifetime value and LTV:CAC ratio
- Pricing Calculator to work backwards from target margin to set price
- Shopify Fees Calculator showing exact fees across all plans and payment methods
- Refund Impact Calculator to quantify profit erosion from refunds
- Ad Metrics Calculator for ROAS, CPC, CTR, and cost per conversion
- Product Viability Calculator with YES/MAYBE/NO verdict
- Support for multiple currencies including USD, EUR, GBP, and CZK
| - 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
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| What makes it different | - Completely free with no premium tiers, feature locks, or trial periods
- No account creation required, no data stored on servers
- Formulas follow standard ecommerce accounting with Shopify fees kept up to date
- Works for any ecommerce platform with manual fee fields for Amazon, Etsy, WooCommerce, TikTok Shop
- No signup requirement or data tracking beyond basic anonymous analytics
| - 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
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 7 ▲ +1 (up) since last check | 16 ● no change since last check |
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| Trust Flow (Majestic) | 3 | 18 |
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| Citation Flow (Majestic) | 15 | 24 |
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| Referring domains (Majestic) | 14 | 18 |
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EcomCalc
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