Voltage cutoff is set to 2.5 right now. I will see how things look in the morning, and if the delta is still the same (around 0.17v) I will drop the cutoff voltage to compensate. I was not expecting that big of a difference (made the cables myself with nice ring terminal) - that being said, it's a cheap load tester..What Voltage did you set your electronics load to cut off low Voltage at? You may have to compensate the low cutoff Voltage due to the tester meter is not showing true Battery Voltage reading because the Volt meter of the tester is not directly connected to the battery terminals. You can check the Voltage drops on the wires between the Battery terminals and the terminals of the tester to see what it is. I get about the same difference Voltage readings on my tester and the meter too.
40AH down - 270 to go! (I hope!)