I realised that any unit can’t take more than 2 amps
not sure what you meant by that, but I have some suggestions that might help.
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Try using a thicker wire (4x, 8x, 16x, etc), as they have limited amperage. (the tooltip should tell you the amp limit of each cable)
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Battery buffers accept/emit different amounts of amps based on their size (and amount of batteries you put inside). For example, if you put 4 batteries in a 4x battery buffer, it can accept 8 amps (2x the amount of batteries you put in, I think) and output 4 amps.
I hope this helps.