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Do you have the sub info codes?
I was actually referring to the sub information codes that would've been stored along with the P0A0D code. Most scan tools will not offer that information. That being said the basic problem for this malfunction code is the safety lock or interlock system is open. The circuit is not complete. When you installed the inverter there should've been a small ground wire that comes up to a small bracket towards the front left side of the inverter case. This wire has to be grounded to the case and the safety plug reinstalled correctly on the hybrid battery if either one of these is not installed correctly this code will set. Double check the small wire on the inverter housing let me know what you find.