Amp-hour capacity ratings – different industries use different rates depending on their applications.

For instance, Solar or Renewable Energy can use Capacity over 24 hours (C24) for a daily average. But can also use C48 or C72, commonly they use C100 or C120 to get a better more consistent average. The larger the hours rating the more focused to rating becomes. Weekdays often differ from weekends and 5 days average will give at least some allowances for both if your first day of measure is Wednesday and ending on Sunday therefore as in this example the C120 is a valuable tool.

If you have a battery rated at C20 & C10, you can calculate its C120 rate or any other rate for that matter.