Total Voltage: 22v x 3 = 66V Total Current: 4.52A Total Power: 300W Charge Current: A flow of electrical charge carriers Resistance: A measure of the opposition to current flow in an electrical circuit. The primary battery gets a largest amount of charge current, with every set of interconnecting cables the charge current depletes from one battery to the next leaving the last battery with very little charge current. This will then happen in reverse when the battery bank is being charged. In the diagram shown, the primary battery is the first power source which has least resistance and therefore this one takes the biggest hit. The path with the least resistance always wins. Electricity will always take the path of least resistance, like water flowing in a river. The way in which these are connected puts strain on the primary batteries and is considered unbalanced.Īs you can see in the diagram the battery closest to the installation, let’s call this the primary battery, is the first in line to be discharged and is also the first to receive a charge current.Įach set of connecting cables, between each battery, creates a resistance. This diagram shows a common way in which parallel battery banks are incorrectly connected. This is a crucial step and often overlooked during the installation stage. When connecting your batteries in parallel you must balance your battery bank as discussed above. If this is not adhered to you are in danger of damaging your batteries and depleting their lifecycles.Ĭommon mistakes when connecting batteries in parallel This way of wiring increases the likelihood that the manufactures specified life cycles will be met. This way the charge and discharge is evenly spread throughout the entire battery bank. The current being drawn from the battery bank will now be equal across each battery and the bank will receive charge equally across all its batteries. See how the negative has been taken from the last battery to the installation, whilst the positive has been taken from the first battery to the installation. The diagram to the right depicts a battery bank correctly connected in parallel. Instead of connecting both the positive and negative at one end of the bank via one battery, we connect the positive to the load at one battery bank and the negative to the load from the other end of the battery bank. You also need to consider balancing the system. In parallel the battery voltage remains constant and the amp hours increase.Ĭonnecting your batteries in parallel is not just as simple as connecting all the reds and all the blacks. The common mistake here is to double the voltage and not the amp hours. The system above comprises of two individual 100ah lithium-ion batteries connected in parallel. Victron Energy SmartShunt Battery Monitors.
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