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Size the battery before the battery fails
Most premature battery failures are sizing failures — a bank chosen by guesswork, then discharged deeper and harder than its design ever allowed. Sizing is not arithmetic on a load and a runtime. It is the duty cycle, the discharge rate, the end-cell voltage, the site temperature, the ageing allowance and the depth of discharge, each applied in the right order.
Send us the duty and our engineers will size it for you, at no charge. You get the required capacity worked line by line against our own released discharge tables — not a generic estimate — together with the cell count, the recommended type and the charger to match.
What to send us
- Motive power — forklifts, mining locomotives, RGVs and AGVs, boom lifts, cranes: the travel distance and speeds, running currents, trips per shift and shift length. Or simply an average current and the working hours.
- UPS, telecom and substation DC — the load in watts or amperes, the backup time, the DC bus voltage, the end-cell voltage your system trips at, and the lowest room temperature.
- Solar and off-grid — the daily load, the system voltage, the days of autonomy required and the depth of discharge you want to hold to.
Method: Dr. Michael McDonagh, Microtex Energy. Margins follow IEEE Std 485 and IEEE Std 1013 recommended practice — temperature correction, ageing allowance and design margin, each shown as its own line so you can audit the answer rather than trust it.
NOTE — OUR SELF-SERVE SIZING TOOL IS TEMPORARILY WITHDRAWN WHILE ITS DISCHARGE DATA IS REVISED. ENGINEERING SIZING CONTINUES AS NORMAL.
Not covered here by design: engine-starting batteries (gensets, locomotives) and RDSO-governed railway duties follow different methods — ask engineering directly.