You can connect your load to one of the batteries and it will drain both equally. The diodes prevents one battery from chargingdischarging another battery.
Batteries Series Parallel Connection Mr Watt Shop
Can you connect different amp hour batteries in parallel. As stated already you should only connect batteries of same typeagebrand in series. Connecting batteries of different amp hour capacities in parallel this is possible and wont cause any major issues but it is important to note some potential issues. When you connect two or more batteries that dont charge and discharge at the same rate one battery will probably end up overcharged andor one battery will end up undercharged. Different types of batteries flooded or agm also can have different chargedischarge characteristics. How battery charging works with a parallel battery bank. They can have different capacities on account of size or age but the same chemistry eg.
Check your battery chemistries sealed lead acid batteries for example have different charge points than flooded lead acid units. That can be true even if the batteries are the same size. However you can connect batteries of different ah in parallel using diodes. You can connect two different ones with no damage to either. In parallel you should use diodes to connect the batteries to the ups. Connecting two banks with different capacities in parallel is technically fine since the batteries will be operating at the same voltage.
Negative to negative and positive to positive. Connecting two battery banks of different amp hour capacity together in series is a bad idea. To join batteries in parallel use a jumper wire to connect both the positive terminals and another jumper wire to connect both the negative terminals of both batteries to each other. The amp hour ratings tell you the capacity of the battery. All flooded lead acid or all agm. 27 year in the auto business.
Lets suppose you have 3 different 12v batteries wired in parallel to supply 12v power to your rv.
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