You can connect your load to one of the batteries and it will drain both equally. Different types of batteries flooded or agm also can have different chargedischarge characteristics.
Calculate Size Of Inverter Amp Battery Bank Electrical Notes
Can you connect different amp hour batteries in parallel. Lets suppose you have 3 different 12v batteries wired in parallel to supply 12v power to your rv. Connecting two battery banks of different amp hour capacity together in series is a bad idea. As stated already you should only connect batteries of same typeagebrand in series. In parallel you should use diodes to connect the batteries to the ups. 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.
You can connect two different ones with no damage to either. 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. However you can connect batteries of different ah in parallel using diodes. Check your battery chemistries sealed lead acid batteries for example have different charge points than flooded lead acid units. The diodes prevents one battery from chargingdischarging another battery. How battery charging works with a parallel battery bank.
27 year in the auto business. All flooded lead acid or all agm. They can have different capacities on account of size or age but the same chemistry eg. Negative to negative and positive to positive. Connecting two banks with different capacities in parallel is technically fine since the batteries will be operating at the same voltage. 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.
That can be true even if the batteries are the same size.
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