I recommend hiring a licensed electrician as in most areas one is required for hookup. Most will give you a free estimate and will size the proper generator for you.
electrician can help it all depends on what you want to run. first i would check on local ordnance to make sure you can have one. your building dept and code compliance can help with that.
I also recommend getting a licensed electrician to assist you with this question, as it relates to the size of your panel.
Yeah it changes from home to home so you should get a professional
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