Search results

THANK YOU!! You were spot on! Despite the fact it's the shunt that came with the unit (and I can't adjust the unit), it appears to be off by nearly exactly 300%. It drove me crazy that the 150W heater was registering only 50W pull, and now I know why. This is why the right tools are so...

I'm using the shunt that came with the measuring device, but that's no guarantee! I'll see about measuring the shunt resistance when I'm done with this run. Here's my plan for checking the shunt / measuring device when this first test is complete. 1) I've ordered another shunt based meter...

Spludgey, thanks for the works of encouragement! Here's a photo of my crazy test rig, plus a photo of the rest of the batteries. I have 48 for a sailboat repower and 4 for testing purposes.

Quick update: Still running. - At 18 hours, voltage dropped to 12.7V (measurements indicated 1,020 Wh, and 78.6 Ah) with cell values as 3.203, 3.186, 3.204, 3.202 volts I've ordered a 12V BMS to arrive tomorrow so I don't have to watch the batteries so closely, as well as an additional...

This is really helpful. I'm currently at 12.7V which, by this table still shows substantial amount remaining. The fact that I'm still only 82.5Ah of 272 gives me pause, but I'll let the whole run play out before making a judgment. (Plus testing my current measuring device...) Thank you...

That's what I'm concerned about. If I'm ACTUALLY running at 150W then my calculations are all off by 300%. And if that's the case, I'm dead on for 272Ah. :-) That's what I'm really worried about. I just have one capacity tester. My multimeters both measure current in mA, and have pretty low...

Thanks, Banszi! That's good to know. I can safely discharge to 2.5V, but the rule of thumb shows that once my value drops to 3.2V my SOC is already at 5%. So how much more can I expect to get between 3.2V and 2.5V. I can't imagine it's more than I got from the drop from 3.5V to 3.2V given the...

I received a set of 52 Lishen 272Ah batteries, and am running a test of a 12V system as a representative sample to get a solid feeling about the quality of the batteries I received. I'm clearly doing something wrong, as my Ah measurements are coming in very, very low -- less than 1/3 of rated...

I had a similar experience ordering Lishen cells from Basen (Alex Chen). Cells were rewrapped by Basen, but all looked good coming out of the box. All have the same terminals with the single negative terminal bump. They do have different vents, about 10% are blue, all the rest are grey. Battery...