The voltage (or cells in series as more cells in series increases the voltage) is a key piece of info provide context for an ah number.
If you have 7s packs in series (e.g. 24v nominal) where each pack is 279ah - then its 279ah@7s (24v nominal) = 6,696wh. As a comparison, 279ah@1s (3.7v nominal) is only 1,032wh.
A lot of youtubes on RV systems say "We have 200ah" but what they mean is 200ah@12v which is only 50% of the power of 200ah@24v.
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