How Long Will a 100ah Battery Last?
One of the most important things to consider before purchasing a 100ah battery for your inverter is how long it will last.
How long will a 100ah battery last depends on various factors such as the efficiency of the inverter, the depth of discharge, and the load being run.
Understanding these factors is crucial to ensuring that you purchase the right battery for your needs and make the most of your investment. When a 100ah deep cycle battery is connected to a 12v inverter, it is expected to last approximately 5 hours if it is discharged with a load of 150 watts at 80% efficiency and 80% depth of discharge.
However, if the load increases to 300 watts, the battery's backup time is halved, and it will only last half the time.
Calculate Your Inverter Battery Backup Time
Determining how long will a 100ah battery last is crucial in ensuring that you have the right battery for your needs. To calculate the backup time, add up the total wattage of all the devices you plan to power.
For instance, if you want to power six 9-watt LED lights, a 45-watt TV, and a 90-watt fan for 5 hours, you will need an inverter that can handle the load and a battery bank that can power the load for the desired backup period.
A useful formula to find out how long a 100ah battery will last is by using the following equation:
12v (Battery Bank Voltage) x 100ah (Battery Capacity) x 0.8 (Depth of Discharge) x 0.8 (Efficiency) / 189 watts = 4 Hours.
The result of this formula shows that a single 100ah battery cannot power a load of 189 watts continuously for 5 hours without damaging the battery. To achieve the desired result, you will need to add another battery to your setup.
If you were to add another 100ah battery to your setup, the formula would be:
12v (Battery Bank Voltage) x 200ah (Battery Capacity) x 0.8 (Depth of Discharge) x 0.8 (Efficiency) / 189 watts = 8 Hours. This formula shows that the battery bank now has the capacity to power a load of 189 watts for 8 hours, providing you with the desired backup time.
Examples
Inverter Size Battery Bank Load Backup Time
Mercury 1KVA Inverter 12v 1x 100AH 150 Watts 5 Hours at 80 % depth of discharge Mercury 1KVA Inverter 12v 1x 100AH 300 Watts 2.5 Hours at 80 % depth of discharge Mercury 2.4KVA Inverter 24v 2x 100AH 150 Watts 10 Hours at 80 % depth of discharge Mercury 2.4KVA Inverter 24v 2x 100AH 300 Watts 5 Hours at 80 % depth of discharge Mercury 3.5KVA Inverter 48v 4x 100AH 500 Watts 6 Hours at 80 % depth of discharge Mercury 3.5KVA Inverter 48v 4x 100AH 1000 Watts 3 Hours at 80 % depth of discharge Mercury 5KVA Inverter 48v 4x 100AH 500 Watts 6 Hours at 80 % depth of discharge Mercury 5KVA Inverter 48v 4x 100AH 1000 Watts 3 Hours at 80 % depth of discharge Mercury 7.5KVA Inverter 120v 10x 100AH 1500 Watts 5 Hours at 80 % depth of discharge Mercury 7.5KVA Inverter 120v 10x 100AH 3000 Watts 2.5 Hours at 80 % depth of discharge Mercury 10KVA Inverter 120v 10x 100AH 1500 Watts 5 Hours at 80 % depth of discharge Mercury 10KVA Inverter 120v 10x 100AH 3000 Watts 2.5 Hours at 80 % depth of discharge Mercury 30KVA Inverter 384v 32x 100AH 2500 Watts 9.5 Hours at 80 % depth of discharge Mercury 30KVA Inverter 384v 32x 100AH 5000 Watts 4.5 Hours at 80 % depth of discharge Mercury 30KVA Inverter 384v 32x 100AH 10000 Watts 2 Hours at 80 % depth of discharge
In conclusion, a 100ah battery is a useful and versatile power source, but how long will a 12v 100ah battery last depends on several factors. Understanding these factors is crucial in ensuring that you purchase the right battery for your needs. If you follow the steps outlined in this article and use the formulas provided, you will be able to determine the backup time of your battery bank and make an informed decision when purchasing a battery for your needs.
For more information on purchasing the right inverter battery for your needs, be sure to visit our website, mercurydirect.com.ng. If you're in Lagos, Nigeria, you can visit our Mercury Lagos Store at 5a Sunday Adigun St, Oregun 100212, Ikeja. Our support team is always ready to assist with any questions you may have. You can reach us by phone at 07037451701 or email support@mercurydirect.com.ng.