Battery Backup Calculator
Calculate backup time and power requirements for battery systems
Battery Backup Calculator
Calculate estimated battery backup time based on battery voltage, capacity, load power, system efficiency, and depth of discharge.
Inputs
Results
How to Use the Calculator
- Select the battery voltage from the dropdown menu. If you choose Custom, a Custom Voltage field will appear—this value is required for calculation.
- Enter the battery capacity in Ah, the load power in watts, system efficiency (%) and depth of discharge (%).
- Click Calculate to display the results on the right panel.
- Click Reset to clear all fields and start a new calculation.
Battery Backup Reference
| Battery | Load (W) | Backup Time (Hours) |
|---|---|---|
| 12V 100Ah | 200 | 4.8 |
| 24V 200Ah | 500 | 6.8 |
| 48V 150Ah | 1000 | 5.4 |
This table provides a quick reference for common battery combinations. Actual backup time may vary depending on temperature, battery age, and load conditions.
Calculation Steps
- Capture Battery Specifications
- Collect battery voltage, capacity, and chemistry (if applicable).
- Define Load Profile
- Enter the total load power (W) for the devices you want to back up.
- Compute Stored Energy
- The calculator estimates usable energy based on battery voltage × capacity × depth of discharge × system efficiency.
- Estimate Backup Time
- Backup Time (hours) = Usable Energy ÷ Load Power
- Backup Time (minutes) = Backup Time (hours) × 60
- Display Results
- Results panel shows:
- Backup Time (hours)
- Backup Time (minutes)
- Usable Capacity (Ah)
- Battery Energy (Wh)
- Results panel shows:
OEM / ODM Battery Pack Supplier – SAFTEC
SAFTEC is an battery pack manufacturer, supplying OEM / ODM packs to manufacturers, system integrators and large fleet owners.
Complete packs with cells
- We build LiFePO4 battery packs from qualified, safety-tested cells to meet your lifetime and cost targets.
- The cells are configured into modules and packs with proper balancing and verification testing.
- You receive a fully tested, ready-to-install finished battery pack, including the BMS, enclosure, wiring harness and connectors.
Cell-ready packs without cells
- We design and supply the mechanical enclosure, busbars, wiring harness, BMS, contactors and protections, ready for cell installation.
- Cell spaces, compression and thermal paths are tailored to your preferred cell format (prismatic, pouch or cylindrical).
- You can install your own cells, or ask SAFTEC to integrate cells from your nominated suppliers.
Applications of Saftec LiFePO4 Batteries
Our batteries fit many applications, and we are developing more solutions. Share your application, voltage and capacity needs, size limits, and communication requirements, and we will recommend a suitable model or customize a pack.
Ready to Talk About Your Battery Project? Contact SAFTEC
If you’re looking for high-quality lithium-ion battery systems for your applications, look no further than SAFTEC. With our advanced battery solutions and deep industry expertise, we can help you achieve your productivity and efficiency goals while reducing costs and improving safety. Contact us today to learn more about our battery systems and how we can help you take your operations to the next level.