So you may think 48 is a lot more efficient than 24 volts. Its not much. Maybe 2 or 3%. The thing is with 48 is you need a lot more batts to make up your bank.If tho's are 6 volts each you would need 8 to make 48 volts. So what happens if you lose just one of tho's. Your now down all 8. Where in a 24 volt setup up. You can still use 4 and have some power.

That is where 48 volts hits a wall. All of that for 4% more efficiency just is not worth it in my book. That is why I like and use 24 volts. Hope that helps some. God Bless