Vanti Power Calculator
Estimate how long your battery bank will last, what battery level you may arrive with, and what practical changes can improve your power margin.
Use the value from your Victron display or battery monitor.
Defaults: lithium 20%, AGM/gel/flooded 50%.
These are typical values. You can refine them later if needed.
Use the device selections in the first load section. The calculator estimates daily usage from those loads.
For customers who know their exact load, use the manual current load field in Underway mode.
Trip Status
You are expected to arrive above your recommended reserve.
Time Remaining
Until reserve SOC
Battery on Arrival
At destination
Time to Recharge
To 100%
Current Power Use
Estimated average draw
Vanti Advice
Enter your battery and load details to see practical advice.
Live Scenarios
Test practical changes and see how they affect your arrival battery level.
Scenario Result
Select a scenario to see the effect.
Suggested Actions
Daily Use
Estimated Ah/day
Daily Charge
Estimated Ah/day
Net Daily Balance
Usage minus charging
Estimated Days Available
Before reserve
Use this estimate as a starting point. For accurate design, battery sizing, solar planning and charging setup, get a Vanti Power Audit.
Get a Vanti Power AuditThis calculator provides estimates only. Battery condition, temperature, wiring, charger settings, BMS limits, solar angle, sea state and actual appliance draw can all affect results.