Four main types of a conventional deep cycle and lead acid batteries So, based on the lower end:ġ00 AH battery = 50 AH available capacity/2 amp draw = 25 hours usage.
#12 volt deep cycle battery charge chart full#
This translates to probably around 2 – 4 amps an hour under normal usage as your laptop won’t be using the full amount at all times. It’s likely to be somewhere between the 3 and 5 amp mark. If you want to power a laptop computer, check the amps rating on the adaptor. Measuring your Depth of discharge is a very important calculation you should make when choosing the size of a deep cycle battery. So if you have a 100 AH battery, consider the cut-off discharge depth being 50 AH. However, if it only discharges to 50%, the expected number of cycles skyrockets to around 1700! If a cycle is a day, that adds over 1.25 years to the life of the battery.ĭepth of discharge, also known as DOD, shouldn’t be any more than 50% in most deep cycle batteries in order to get the best value for money. with only 30% or 30 Ah (amp hours) remaining, will have a lifespan of around 1200 cycles, which is quite impressive. The general rule of thumb: the less your deep cycle battery discharges before recharge, the longer it will last.Ī Sonnenschein Solar Bloc 100 AH Gel Battery discharged to a depth of 70%, i.e.
Once all load is removed from a battery, the voltage can bounce back up substantially. If you take the reading when the panels aren’t exposed to the sun, as there will likely be power being drawn at the time, you can assume that whatever the voltage reading, it’s a conservative estimate. If you take a reading while the battery is receiving charge, it could read anything up to 14.5 volts. So, the best time to take the reading is early in the morning before the sun hits your panels, in the evening as the sun is setting, or when it’s very overcast. This scenario may not occur very often in a battery based system that’s in continual use. That is when the deep cycle battery hasn’t been under load for a few hours. Note: The figures in the AGM battery voltage chart, lead acid battery voltage chart, and car battery voltage chart are based on open circuit readings. Recovers slightly sulfated batteries.The battery voltage chart below shows the voltage and approximate state of charge for each type of battery, including AGM batteries, lead acid batteries, and car batteries. Waterproof: SLA, VRLA, AGM, Deep Cycle, Wet, Flooded,Conventional (best for boats, tractors, powersports) Golf Cart Battery Charger - Also ok for Industrial SLA, VRLA, AGM, Deep Cycle, Wet, Flooded,Conventional (SLI, Marine, RV) Golf Cart Battery Charger - Also ok for Industrial SLA, VRLA, AGM, Deep Cycle, Wet, Flooded,Conventional SLA, VRLA, AGM, Deep Cycle, Wet, Flooded,Conventional, LiFePO4 Heavy Duty: SLA, VRLA, AGM, Deep Cycle, Wet, Flooded,Conventional International: SLA, VRLA, AGM, Deep Cycle, Wet, Flooded,Conventional Waterproof: SLA, VRLA, AGM, Deep Cycle, Wet, Flooded,Conventional (best for ATVs, watercraft, motorcycles, or boats) SLA, VRLA, AGM, Deep Cycle, Gel Cell, LiFePO4
#12 volt deep cycle battery charge chart manual#
You may also refer to your user manual or battery manufacturer for charger recommendations. The information is based on the charger manufacturer’s recommendations for the battery capacity and type. The following chart is lead acid battery chargers that we currently have available for purchase (last updated August, 2013). rate).Įxample to charge a 12 volt / 7.5Ah battery, select a charger with a maximum charge output of 1.5 Amps (7.5 x 0.20 = 1.5).
Please remember this is a general calculation and charge times will vary depending on the state of discharge on the battery.Īs a general rule of thumb when selecting a charger for a lead acid battery, match the voltage and use one that is no more than 20% of the capacity rating of the battery (at a 20hr. So it will take approximately 3 hours to charge a 30Ah battery with a 10Ah battery. (Battery Capacity) / (Charger Current) = HoursĮxample: Charging a 12v / 30Ah battery with a 12v / 10Ah charger. Depending on the state of discharge, you can approximate how long your lead acid battery will need to charge. The capacity is expressed in Ah or amp hours.įinally, determine your usage and how fast you need the battery back in service. The most common voltage of lead acid batteries is 6 or 12 volts. Generally one battery charger will work for all of these the exception is LiFePO4 and gel cell.Next, find the voltage and capacity on your battery. If you need further assistance please contact our friendly customer service department.įirst, identify what type of lead acid battery you have, LiFePO4, wet cell (flooded), gel cell, or AGM/VRLA maintenance free. This guide will aid you in locating a charger for your lead acid battery. Purchasing the right charger is the key to proper maintenance for a longer battery life.
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