Lithium Ion batteries are charged with an absorption voltage of xiv.25 V for 12 V, and 28.five V for 24 5 systems. The float voltage is thirteen.5 V for 12 V and 27 5 for 24 V systems. Charge currentĪ rule of thumb for gel and AGM batteries states that the minimum charging electric current should exist 15 to 25 % of the bombardment capacity. During charging, y’all unremarkably go on to supply ability to connected devices, and this power consumption should be added to the xv-25 %. This means that a 400 Ah battery depository financial institution and a connected load of ten amperes requires a battery charger capacity of between lxx and ninety amperes in lodge to charge the battery in a reasonable time. The maximum charging current is l % for a gel battery, and 30 % for an AGM battery. Mastervolt Lithium Ion batteries can be subjected to much higher charge currents. However, to maximise the lifespan of the Lithium Ion battery, Mastervolt recommends a maximum charging current of 30 % of the capacity. For a 180 Ah battery, for instance, this ways a maximum charge current of 60 amperes. A battery charger with temperature compensation for optimal protectionĮnsuring the longest possible lifespan for gel, AGM and Lithium Ion batteries requires a modern Mastervolt bombardment charger with a iii-pace+ charge characteristic. These bombardment chargers continuously regulate charge voltage and charge current.įor wet gel and AGM batteries, it is recommended to have a sensor for measuring the temperature of the bombardment. This adjusts the charge voltage to the temperature of the battery, extending its lifespan. We call this ‘temperature compensation’.īecause devices such as refrigerators are ever drawing power from a battery, even while it is being charged, Mastervolt’s temperature compensation includes a maximum offsetting effect to protect the connected devices. The compensation is at most 14.55 V for a 12 V system, and 29.one Five for a 24 V system.Īt very high (> 50 ☌) and low (<-twenty ☌) temperatures, moisture gel and AGM batteries may no longer be charged. The formula beneath is used to calculate the charging time of a Lithium Ion bombardment: The formula beneath is used to calculate the charging time of a Gel or AGM battery: Outside of these limits, the Mastervolt battery charger will continue to supply the connected consumers but not charge the batteries.Īdjusting the voltage to a college or lower temperature is not required for Lithium Ion batteries.

24 volt alternator charging system