Alkaline
Solar Wizard
No, there isn't for the purpose of capacity testing. If a 1000V battery says on the label it's 10Ah, I should be able to take a tester and verify the 10Ah. That's how batteries are specified, precisely because it takes all the losses of measuring Wh out of the equation.
I'm not sure I can agree here... You can take a 12v battery 100AH battery put a dc-dc down converter to 6v and then violla you now have a 200AH 6v battery, so have I magically double my AH?
Do we even know how eve is testing these cells? The qr codes always say WH on them, on the 280K it is 896 WH not AH. Maybe we need to start looking at WH more closely.
I want to point to this thread:
Poor Docan Experience (Resolved)
Purchased 16 eve 280k from Docan over a month ago confirming the description had them as brand new, full capacity cells. Cells arrived bloated, more than 5mm out of spec at only 3.2v. No grade B QR and had the front labels that they had been "tested" at 280ah and matching IR .19. - Reached out...
diysolarforum.com
see: https://diysolarforum.com/attachments/cell1-274-png.115790/
vs
I posted about this on October and Both these cells test to 274AH but cell1 is making 880 WH and the cell7 is 866WH and if all you looked at was the 274AH you would say well hey they are the same. The 880 Wh cell has more usable energy than the 866 Wh yet they both have the same AH???
Also the cell 1 average voltage is 3.21 but cell 7 is 3.16
So there is something to look at when it comes to WH and voltage when it comes to AH.