24V Battery Runtime Calculator Lithium Battery Zone, January 4, 2025January 7, 2025 Need to know how long your 24V battery system will last? This 24V Battery Runtime Calculator helps you estimate runtime based on your battery capacity and load requirements. 24V Battery Runtime Calculator Calculate how long your battery system will last Battery Capacity (Ah) Enter your battery’s amp-hour rating Load Current (Amps) Enter the current draw of your device(s) Depth of Discharge (%) Recommended: 50-80% for lead-acid, up to 90% for lithium Battery Type Lead Acid AGM Gel Lithium (LiFePO4) Calculate Runtime Estimated Runtime 0 hours Available Capacity 0 Ah Power Usage 0 Watts The 24V Battery Runtime Calculator helps you determine how long your battery system will operate under specific loads. This tool is essential for: Solar power systems RV and marine applications Backup power systems Industrial equipment Mobile power solutions Basic Concepts Key Terms Battery Capacity (Ah) Measured in Amp-hours (Ah) Indicates total energy storage Example: 100Ah battery can supply 5 amps for 20 hours Load Current (A) Measured in Amperes (A) Current drawn by your devices Example: LED light might draw 0.5A Depth of Discharge (DoD) Maximum recommended discharge percentage Affects battery lifespan Typical ranges: Lead Acid: 50% AGM/Gel: 80% Lithium: 90% Battery Types Lead Acid Efficiency: 85% Cost: Low Lifespan: 3-5 years DoD: 50% AGM (Absorbed Glass Mat) Efficiency: 90% Cost: Medium Lifespan: 4-7 years DoD: 80% Gel Efficiency: 90% Cost: Medium-High Lifespan: 5-8 years DoD: 80% Lithium (LiFePO4) Efficiency: 95% Cost: High Lifespan: 10+ years DoD: 90% How to Use the 24V Battery Runtime Calculator? Step 1: Enter Battery Capacity Example: 100Ah battery = Enter "100" 200Ah battery = Enter "200" Step 2: Enter Load Current Example: 5A load = Enter "5" 2.5A load = Enter "2.5" Step 3: Set Depth of Discharge Example: 80% DoD = Enter "80" 50% DoD = Enter "50" Step 4: Select Battery Type Choose based on your battery chemistry Affects efficiency calculations Understanding Results Runtime Display Shows hours and minutes Considers efficiency losses Accounts for DoD limits Available Capacity Usable amp-hours Accounts for DoD Includes efficiency factor Power Usage Shows watts (W) Calculated as: Current × 24V Helps with power planning Application Examples RV System Battery: 200Ah AGM Load: 10A DoD: 80% Runtime ≈ 15.2 hours Solar Backup Battery: 300Ah Lithium Load: 15A DoD: 90% Runtime ≈ 17.1 hours Marine System Battery: 150Ah Gel Load: 8A DoD: 75% Runtime ≈ 12.7 hours Best Practices 1. Battery Selection Choose based on: Budget Space constraints Environmental conditions Required lifespan 2. Load Management Calculate total loads Include surge currents Consider periodic loads Plan for future expansion 3. System Design Include safety margins Consider temperature effects Plan for maintenance Monitor system performance 4. Maintenance Tips Regular voltage checks Clean connections Temperature monitoring Capacity testing FAQ Q: How accurate is the calculator? A: Accuracy depends on input accuracy and real-world conditions. Results are estimates. Q: Should I always use maximum DoD? A: No, lower DoD increases battery life but requires larger capacity. Q: How does temperature affect runtime? A: Lower temperatures reduce capacity: At 32°F (0°C): -20% capacity At 68°F (20°C): 100% capacity At 113°F (45°C): Reduced lifespan Quick Reference Table Battery TypeRecommended DoDEfficiencyTypical LifespanLead Acid50%85%3-5 yearsAGM80%90%4-7 yearsGel80%90%5-8 yearsLithium90%95%10+ years Enjoyed this 24v battery run time calculator? Then be sure to check out our other lithium battery guides. Best 3000 Watt Solar Generator Best 1000 Watt Solar Generator Best 200Ah Lithium Battery for RV Best 36 Volt Lithium Trolling Motor Battery Best 48V Lithium Battery for Golf Cart Best 2000 Watt Solar Generator Lithium Battery Knowledge