Marine Battery Reserve Capacity

Definition of reserve capacity.

Marine battery reserve capacity.

This rating is a crucial parameter to judge batteries especially deep cycle batteries. After the batteries were conditioned fully charged and rested overnight at room temperature we started the first round of our reserve capacity discharge test. For a much smaller battery like our group d51 yellowtop the reserve capacity is just 66 minutes. If your sole reason for buying a marine battery is to start your medium power inboard or outboard engine the optima 34m bluetop marine starting battery is a trustworthy choice.

With cranking amps of 870 amperes this is a great battery for your rv or boat. This deep cycle marine rv battery is rated for 500 mca marine cranking amps and 80 amp hours. The reserve capacity of a battery is the number of minutes for which it can run at 25 amps of current without its voltage dropping below 10 5 volts. Moreover the battery has a reserve capacity of 120 minutes for constant performance.

Reserve minutes also called reserve capacity is the number of minutes a fully charged battery can sustain a designated constant load usually 25 amps before it is fully discharged. It roughly describes the amount of energy the battery effectively stores and technically specifies the battery s charge. In the case of a battery like our group d27f yellowtop the reserve capacity is 140 minutes. The reserve minute rating is the number of minutes that a battery can run a 25a load until dropping to 10 5v just like with starting batteries.

Testing the batteries reserve capacity discharge. Boaters traditionally think of battery capacity in terms of amp hours but if the battery will be used to power an inverter the reserve minutes rating can be more telling. A group 27 deep cycle battery with a rating of 180 reserve minutes will run a 25a load for three hours. Keep in mind both of these batteries are designed for deep cycle use while batteries like our redtop line are not designed or warrantied in deep cycle applications.

Reserve capacity rating rc is the number of minutes at 80 degrees f that the battery can deliver 25 amps until it drops below 10 5 volts. Significance of reserve capacity. This means that a 200ah battery can run a 10a load for 20 hours. It has a 100 minute reserve capacity and a cca rating of 800 amps more than enough to start most recreational engines even in winter.

Even in bad weather it will still hold optimal starting power. Reserve capacity is known as the amount of time a fully charged 12v battery at 80 f can supply 25 amperes at 10 5 volts until the voltage drops down. Rc x 60 percent the two major construction types of deep cycle batteries are flooded lead acid and valve regulated lead acid. It is measured in minutes.

The 140 minute reserve capacity indicates the number of minutes a battery can deliver 25 amps of current without dropping below 10 5 volts.