The ProSportHD 20 Plus Marine Battery Charger ensures that all available charging amperage is fully utilized to meet the unique demands of each onboard battery. We strongly encourage the use of efficient charge devices, both for shorepower charging and alternator regulation, that use modern multiple-step regulation. This type of battery charging, consisting of multiple stages, is not possible with automotive-type alternator regulators, unregulated solar panels, ferroresonant chargers, or taffrail generators. Since electrical equipment and light bulbs can be damaged by high voltage, the battery should be disconnected from all loads during equalization. Gel and AGM batteries should not be equalized. In the marine environment, it is more likely to be done every 20–50 cycles to extend the life and capacity of wet batteries. In industrial applications where maximum energy storage is important, this phase is done every charge cycle. This forces the battery to its highest possible state of charge, boiling the electrolyte in a controlled manner and dissolving the lead sulfate crystals that have collected on the battery’s plates. After the battery reaches the end of the acceptance phase, the battery continues to be charged at four percent of C until the voltage stops rising, usually around 15.5 to 16.2 volts. This is a maintenance phase, not a charging phase.Įqualization: This stage is used to prevent flooded lead acid batteries from aging prematurely, and is an optional, frequently omitted phase. Note: In the following section, we define the capacity of the battery bank (in amp-hours) as C.įloat phase: When the battery’s acceptance declines to two to four percent of C, the voltage is reduced to 13.4 volts (Gel: 13.8 volts) to maintain the battery without losing electrolyte from the cells. Higher temperatures require lower voltages, and lower temperatures require higher voltages. Most of us generally operate our boats in temperatures between 50☏ and 90☏, and the values used in our West Advisors reflect that. This makes it difficult to recommend precise charging voltages, since they vary according to the temperature of the battery. In the description that follows, remember that recommending precise voltages for batteries is subject to at least two caveats: 1) gel batteries charge at different (and lower) voltages than flooded-type and AGM batteries 2) The voltages stated are temperature-dependent. Marine deep-cycle batteries last the longest and charge the fastest if they are charged in distinct phases, which we refer to as the “Ideal Charge Curve,” the charging schedule recommended by virtually all makers of marine batteries. How Long Do Marine Batteries Take to Charge?.In this article, we'll walk you through common factors and help you choose the right battery charger for your boat. To find out more about chargers that are combined with a power inverter, see our West Advisor, Do-it-Yourself: Selecting an Inverter or Inverter/Charger. We have onboard battery chargers, portable battery chargers and combination inverter/battery chargers for any size or style of boat. Modern “smart” charging options make taking proper care of batteries easy.
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