We would strongly discourage anyone from connecting batteries in series or parallel applications if the batteries are not identical in age size and type. Its important to first determine whether a conventional starting battery will meet your vehicles needs or whether a deep cycle or agm battery is required.
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Deep cycle and starting battery in parallel. Can you use deep cycle batteries for starting a boat. I have customers who get that sort of life consistantly. A deep cycle is designed to draw down slowly and recharge slowly. A large majority of engines or motors used in boats whether its an outboard motor an inboard motor or an inboardoutboard motor also known as sterndrive needs a battery to keep it goinga battery is used not only to start the engine but also to power all the electronic components loaded on the boat fuel pumps injectors electric. When connection 6 volt batteries together it is recommended to use thick diameter cable. However their individual normal life expectancies may become reduced and their individual specs do not fully add when in parallel.
Connecting batteries in series parallel to increase battery system capacity. Can i connect my new bluetop d31m in parallel with my one year old other brand marine 29 series. A properly cared for battery can last 7 10 years thats deep cycle or starting. I see people who use deep cycles in their starting circuit only get 1 2 years out of them usually less. 20 gauge excelene welding cable has high flexibility and is rated for 600 volts. Deep cycle batteries can be entirely drained and recharged many times over cranking batteries cant.
It sounds like your batteries are different in each of those ways. Running flooded lead acids one starting battery and one deep cycle in parallel would normally result in each being at the same state of charge. A cranking battery ensures a boat can easily start and get out on the water. A deep cycle trolling battery keeps it operating and runs electronics in any conditions. Different vehicles and driving styles can place varying demands on your battery.
Gallery of Deep Cycle And Starting Battery In Parallel
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