Battery Backup Calculator

The Battery Backup Calculator on NGDrives is a practical tool that helps homeowners, business owners, and solar installers determine the minimum battery capacity required to keep essential devices running during outages or off-grid scenarios.

This tool is particularly useful for:

• Households and businesses managing power outages or planning inverter battery installations.
• Solar energy users calculating storage needs to match their energy consumption.
• IT professionals or data centers needing reliable power supply for network equipment.
• Health facilities ensuring critical devices are powered during blackouts.
• Off-grid enthusiasts or remote workers depending on uninterrupted electricity.

For example, if your daily power usage is 3,000 Wh (watt-hours), and you need a 3-day backup for your system running on a 12V battery, this calculator estimates the total energy needed, adjusts for battery inefficiencies, and gives you the minimum battery capacity (in Ah) required.

This prevents under- or over-investment in batteries and helps users make smarter, cost-efficient energy storage decisions, whether for backup power or a complete off-grid solution.

Form Inputs:

• Daily Power Consumption (Wh): Total energy your devices consume per day.
• Days Backup Required: Number of days you want the battery to last without recharge.
• Battery Type: Selection of lead-acid, lithium-ion, etc., which affects efficiency.
• Voltage: Voltage rating of the battery system (e.g., 12V, 24V, 48V).

What’s Calculated:

• Total Energy Requirement (Wh) = Daily consumption × Days
• Adjusted Energy Requirement (Wh) = Accounts for battery efficiency (varies by type)
• Minimum Required Battery Capacity (Ah) = Adjusted Energy ÷ Voltage

Output:

• A complete estimate of how much battery storage (in amp-hours) you need to cover your specified backup period reliably.

If you encounter any issues or have suggestions for improvements, please report them using the form below.