![]() I have done both to various AGM batteries over the years & have had a minimum battery life of just under 10 years & an unknown maximum (I sold the vehicle) exceeding 12 years. The other says charge them fully & leave them on float (same as charging them fully & then putting them on a small solar trickle charger). ![]() One says charge them until they drop into float & then switch off charger for a month or three, then repeat. T = 0.38 x 830/166 = 1.9 hrs OR T = 0.38 x 830/120 = 2.There are two schools of thought on the best way to manage AGM batteries when not in use. I =20% of 830 AH = 166 Amps OR If the charger output limit is 120 Amps max, then 120 is used I = Charging Current (Amps) Ģ0 hr rate = 415 AH x (2 strings) = 830 AH ![]() We recommend a charge current of 20% of the 20 hr rate for both Bulk & Absorption charge phases on AGM & GEL VRLA models.Ĭ = 20 hr Rated Capacity (AH) With the help of the 20 AH capacity and charge current, you may calculate the remaining charge time required for the battery bank to reach 100% state of charge (SOC) using the following equation: To set the correct time, a simple calculation is used. Most chargers on the market have a timer that allows the user to adjust the duration for the required time to return the battery to full charge. The Absorption charge phase completes the charging cycle, during which charge resistance increases. The Bulk charge phase recharges the battery bank to an 80% level. The most important part of the charge cycle is the Absorption charge. For assistance and recommendation, please refer to the charge controller manufacturer for instruction and detailed information on this setting. Re-Bulk Voltage: This setting determines the battery bank voltage may drop between a Float and Bulk charge. NOTE: The ideal float voltage is the lowest voltage setting that will maintain the battery at full charge. Without a temperature sensor, charge settings must be adjusted manually based on the battery temperature when in use, not just ambient temperatures. Set at 4mV/✬/Cell.(+/- 96mV per ✬ from a 25✬ Delta - 48V System) Higher or lower settings may cause incorrect adjustments in charge voltage. NOTE: Use the highlighted voltage set points when charge equipment is supplied with a temperature sensor. Charge in a ventilated area as gasses may be released through the pressure relief valve if the.The charger’s ACĬord should be free of breaks or cuts and the wall plug should be clean. The cable connectors should beĬlean and properly mate with the battery terminals to ensure a snug connection. The charger cabling should be insulated and free of breaks or cuts. Please read the following instructions before using your battery. ![]() The best protection from improper charging is the use of a quality charger and routinelyĬhecking that the charger current and voltage settings are maintained. Lead-acid batteries, both over- and under-charging a Rolls AGM battery will result in shortened service ![]() To maximize the life of your Rolls AGM battery, it is important that it is properly charged. ![]()
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