Battery capacity is measured in Ampere Hours (aka Amp Hours) which is normally written as Ah. So a 100 Ah battery can, in theory, provide 100A of current for 1 hour, or 10A for 10 hours, or 5A for 20 hours, etc, etc.
I say ”in theory” because in practice, the life of, say, a Lead Acid battery will seriously suffer if it is regularly discharged below 50% of it’s stated capacity. Consequently, a 100Ah battery should be thought of as capable of supplying 50Ah before it needs to be recharged.
2 x 100Ah Lead Acid batteries will provide twice the useable capacity - i.e. 200Ah in theory but 100Ah in practice, given the 50% rule for Lead Acid batteries. It should also be recognised that 2 batteries will take longer to charge up to full as compared with a single battery.
Lithium is very different from Lead Acid. It can regularly be used down to lower levels than 50% without suffering from serious life issues, it can store its charge for much longer when not in use, it can be charged up by a suitable B2B much more quickly, and it is much lighter in weight than Lead Acid. Lithium is also much more expensive initially, but should last much longer if used properly.
Hope this helps. Lots of folks on here have a lot more knowledge than me and will be able to fill in the gaps.
I say ”in theory” because in practice, the life of, say, a Lead Acid battery will seriously suffer if it is regularly discharged below 50% of it’s stated capacity. Consequently, a 100Ah battery should be thought of as capable of supplying 50Ah before it needs to be recharged.
2 x 100Ah Lead Acid batteries will provide twice the useable capacity - i.e. 200Ah in theory but 100Ah in practice, given the 50% rule for Lead Acid batteries. It should also be recognised that 2 batteries will take longer to charge up to full as compared with a single battery.
Lithium is very different from Lead Acid. It can regularly be used down to lower levels than 50% without suffering from serious life issues, it can store its charge for much longer when not in use, it can be charged up by a suitable B2B much more quickly, and it is much lighter in weight than Lead Acid. Lithium is also much more expensive initially, but should last much longer if used properly.
Hope this helps. Lots of folks on here have a lot more knowledge than me and will be able to fill in the gaps.