TwoFeetDown Posted February 5, 2021 Report Share Posted February 5, 2021 Does the inverter get power from the 12v battery or from the HV battery? Quote Link to comment Share on other sites More sharing options...
plus 3 golfer Posted February 5, 2021 Report Share Posted February 5, 2021 (edited) Are you having issues with the DCAC converter (12V DC to 110 V AC). The DCAC converter is powered from the 12 V system. When the HVB is connected (contractors closed), the DCDC converter provides power to serve load on the 12 V system including charging the 12 V battery and supplying power to the DCAC converter. The 12 V battery “smooths” voltage from potential instantaneous 12 V voltage spikes like from the Internal Combustion Engine on/off operations and other components on the 12 V system. One can monitor / record current flow PIDs from DCDC converter and in / out of 12 V battery along with 12 V voltage at control modules. One will see + / - current spikes for milliseconds as 12 V load changes while voltage remains fairly constant when components are switched on / off. I’ve never seen more than a 0.1 V change from set point 12 V voltage during these instantaneous on/off events. Thus, DCAC converter should see very constant voltage usually between about 14.4 - 14.8 V depending on the DCDC set point voltage as determined by the PCM. The converter will operate down to 11 V DC. When the HVB is not connected (any mode but “ready to drive” mode), the DCAC converter will not operate. Edited February 5, 2021 by plus 3 golfer Quote Link to comment Share on other sites More sharing options...
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