New parts do not always mean good parts.
First, when you do start the engine can you check the voltage? Should be about 13.5. It its not then there is something wrong with the charging system.
Next, if the charging system is ok, you will need to see if something is draining the battery. Try this: Check the battery voltage and then disconnect it. Wait overnight. If the battery lost voltage overnight then there is something wrong with it.
On your car the computer tells the alternator when to charge, this is a bit different then a normal car, so it is important that all the wiring is in good shape.
First, when you do start the engine can you check the voltage? Should be about 13.5. It its not then there is something wrong with the charging system.
Next, if the charging system is ok, you will need to see if something is draining the battery. Try this: Check the battery voltage and then disconnect it. Wait overnight. If the battery lost voltage overnight then there is something wrong with it.
On your car the computer tells the alternator when to charge, this is a bit different then a normal car, so it is important that all the wiring is in good shape.