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:</p> <ol> <li>Your load that is drawing power from the batteries<

  • The battery capacity
  • The amount the batteries are discharged.
  • 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.