A customer recently purchased four Meridian SPS215B AGM batteries from us for his yacht's house bank. He asked these basic, good questions:
How low can the voltage drop before starting to recharge?
Answer: Recharging when the battery gets no lower than 50% State of Charge (SOC) will result in a reasonable cycle life. For the Meridian battery, this is around 12.2 vollts. Recharging at a lower SOC is possible, but will shorten the cycle life of the battery.
How fast can the battery be charged - how many amp/hours is the charger allowed to charge without damage to the batteries?
Answer: Meridian batteries can be charged to 14.8 volts and with unlimited amps.
To run the generator as little as possible, how does one get a fast charge without causing damage?
Answer: Use a charger wth a high charging current output and one where the charging parameters are fully adjustable. Make sure there is no automatic time-out for the transition from the Acceptance Stage to the Float Stage.