Double pole circuit breakers v single pole -

Questions on wiring two 5p batteries to combiner box for rate shifting two breakers in one slot In the US, tandem breakers are more expensive than 2 single pole breakers Many panels do not accept tandem breakers so you would have to use two slot shelving So if the manufacturer has designed a panel to take only full height breakers, then you can't use the pancake breakers or the twins

two breakers in one slot Both “hots” need protection from overcurrent, so we use a double-pole breaker that accepts two wires instead of one These breakers are larger