Also to note that your 1KW appliances need 83 amps in a 12V DC system. This is a huge amount of current and requires special cabling (which has a not insignific

Also to note that your 1KW appliances need 83 amps in a 12V DC system. This is a huge amount of current and requires special cabling (which has a not insignificant voltage drop due to the resistance of the wire) and special connectors.