Quote:
Originally Posted by NiHaoMike
Two use cases I can think of are if there is no spare capacity left to add another breaker or if the panel is quite a distance from the garage but there's an existing circuit that could be tapped.
In the case of adding solar, the concern is that the load could potentially pull more than what the original breaker was sized to allow (since the solar is a second source), so add a second breaker at the load or junction point of the same rating as the original breaker and have the solar connect in between the two breakers.
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The solar "charger" has one important function. You program into it the ampacity of the circuit you are feeding it with. So it could be a 20 amp or 30 amp etc circuit so it knows how much it can pull from the circuit.
The simple part of it is you have to run a dedicated circuit to it by code so no funny business with other solutions.
Now if you don't have any free breaker slots you can possibly install some tandem breakers and double up on some of your 120v circuits and make space for a 240V breaker.
They are available for most panel brands. IE GE,Eaton and some Square D.