Calculating Total Pack Ah

b0re

Member
Joined
Aug 31, 2018
Messages
48
Hello,

I created a 7s pack each pack is 279551 milliampere-hours so 279.551Ah per pack

Do you times 279.551Ah by the packs to give you the total Ah or is it 279.551Ah?

Thanks
 

OffGridInTheCity

Well-known member
Joined
Dec 15, 2018
Messages
1,462
Hello,

Do you times 279.551Ah by the packs to give you the total Ah or is it 279.551Ah?

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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