How long will it take to charge my battery bank with a battery charger?

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Factors that contribute to the time to recharge:

  1. Your load that is drawing power from the batteries
  2. The battery capacity
  3. The amount the batteries are discharged.
  4. The amount of input power available to recharge the batteries.

Let’s assume you have a Tycon RPSTL12/24M-200-340 RemotePro solar power system. This system has 200Ah of batteries and 340W of solar. Let’s assume your Load is 1.5A @ 24V. To make calculations easy, you want to convert battery capacity and load to watts:

  • Battery Capacity: 200Ah * 12V = 2400 Whrs
  • Load Power: 1.5A x 24V = 36W

 

Scenario#1 Batteries are fully discharged, and we are recharging with solar.

  • 2400Whrs battery capacity / (340W Solar – 36W Load) = 2400/304 = 8hrs to fully recharge the batteries.

Scenario#2 Batteries are 50% discharged and we are recharging with solar– This is the most common scenario

  • (2400Whrs battery capacity / 2) / (340W Solar – 36W Load) = 1200/304 = 4hrs to fully recharge the batteries.<

Scenario#3 Batteries are 50% discharged and we are charging with an AC powered 600W battery charger.

  • (2400Whrs battery capacity / 2) / (600W Battery Charger – 36W Load) = 1200/564 = 2.1hrs to fully recharge the batteries.