Post
by coulomb » Fri, 16 Mar 2018, 21:18
Also, why did the power supply current drop from 14 A into the short circuit to some 7 A after a few seconds? It can't be because it's full, because otherwise it only stores a few tens of amp-seconds of energy (a single amp-hour is of course 3,600 amp-seconds).
I would have expected the terminal voltage to rise to about 48 V, representing a dead-flat nominal 48 V battery, and slowly rise to some 56 V, representing a fully charged nominal 48 V battery. It would take hours to fully charge at 14 or 7 A charging, if it has useful energy capacity.
As Chris Jones said above, your demonstration was quite unusual, and indeed raises more questions than answers.
Nissan Leaf 2012 with new battery May 2019.
5650 W solar, 2xPIP-4048MS inverters, 16 kWh battery.
1.4 kW solar with 1.2 kW Latronics inverter and FIT.
160 W solar, 2.5 kWh 24 V battery for lights.
Patching PIP-4048/5048 inverter-chargers.