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Battery ROI Calculator
Battery Investment Analysis
This document is a financial estimate based on provided parameters.
Actual results may vary.
Zonne-energie & Opslag · ECOX

⚡ Battery ROI Calculator

Solar + Battery Storage · Investment Return Analysis

🔋 System Configuration
kWh
kWp
€
📈 Energy Pricing
€/kWh
€/kWh
% / yr
🗓️ Battery Cycles per Year

How many full charge/discharge cycles the battery completes in a year. A typical Belgian installation without EMS does around 288 cycles.

50 (minimal use) 600 (intensive)
Effective annual cycles 288
📊 Daily Usage Profile
kWh/day
30% (mostly export) 100% (fully self-used)
70%
🧠 Energy Management System

An EMS automatically optimises when the battery charges and discharges based on real-time prices, forecasts and consumption patterns — significantly boosting self-consumption.

EMS not active
EMS modus

Optimaliseert zelfverbruik en arbitrage op basis van dag/nacht prijsverschillen.

Self-consumption without battery 30%
Self-consumption without EMS & battery 70%
Self-consumption with EMS & battery 90%
Cycles without EMS & battery 288
Cycles with EMS & battery 325
⚡ Extra Peak Shaving Costs

🏭 For commercial installations only

€/mo
0%80%
0% reduction

This section is for commercial & industrial installations that pay a monthly demand charge. Not applicable for most residential systems.

⚠️
Indicative estimate only — not a binding offer. All figures are calculated projections based on the parameters entered above. Actual savings, payback periods and returns may differ due to changes in energy prices, usage patterns, weather conditions, grid tariffs and battery degradation over time. This document does not constitute a financial guarantee or contractual commitment.
🌱
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CO₂ besparing / jaar
🌳
—
Equivalente bomen / jaar
🚗
—
Equivalente autokilometers
♻️
—
Totale CO₂ besparing (20jr)
Scenariovergelijking
Scenario A — Huidig
—jr terugverdien
—10jr ROI
—besparing jr 1
—totaal 20jr
VS
Scenario B — Met EMS
—jr terugverdien
—10jr ROI
—besparing jr 1
—totaal 20jr
📋 Investment Summary
—
Payback Period
—
10-Year ROI
—
Year 1 Savings
—
Total Savings (20yr)
Payback progress (15-year horizon)
03yr6yr9yr12yr15yr
Break-even grafiek
Year 1 Savings Breakdown
📅 Year-by-Year Cashflow
Year Annual Saving Cumulative Net Position
Scroll to see all 20 years
Calculation assumptions: Battery efficiency 90% · Solar yield 950 kWh/kWp/year (Belgian average) · Self-consumption savings valued at purchase price · Export at feed-in tariff · Peak shaving calculated monthly · Energy price inflation compounded annually · 20-year system lifetime assumed for cashflow table.
© — Prepared by your installer This document is an indicative simulation. It is not a binding offer, guarantee or contract. Results are estimates only and may vary. The installer accepts no liability for differences between projected and actual returns.