How to connect two power supplies in parallel?

Connecting two power supplies in parallel means joining the positive terminals together and the negative terminals together, so that both feed the same load at the same voltage, but doubling the available current.

How to Connect Two Taramps Power Supplies in Parallel

• Use a Protective Circuit Breaker
  Each power supply has a voltage control circuit that can interfere with the operation of the other if connected directly. To prevent this, it is essential to install circuit breakers on the positive outputs of each power supply.
  These circuit breakers prevent one power supply from affecting the other, allowing both to share the load safely.

• Connect the Negative Terminals Directly
  The negative terminals (GND) of both power supplies should be connected directly to each other and to the audio system.
  It is not necessary to use circuit breakers on the negative terminals since they share the same ground potential.

You can use busbars for the system

• The busbar (bars or cables that connect the outputs) must support the total combined current.

• Use copper or aluminum distribution bars for high current.

• Both a negative busbar and a positive busbar are required to connect the power supplies for combined current.

• Check the ideal cable gauge for each power supply model.

• All positive terminals should connect to the positive busbar and all negative terminals to the negative busbar, which will feed the entire system (batteries, amplifiers, modules, etc.).

3. Check the Output Voltage
   Before connecting the power supplies, ensure both are set to the same output voltage, usually between 13.8V and 14.5V.
   Voltage differences can cause current imbalance and possible damage to the system.

4. Properly Size the Cables and Fuses
   Use cables with the appropriate gauge or higher to handle the combined current of the power supplies.
   Also, install protective fuses or circuit breakers near the power supplies to prevent overloads and short circuits.

Important Precautions

• Load Balancing:
  Without the use of circuit breakers, one power supply may deliver all the current while the other remains inactive. This can lead to overheating and premature failure of the power supplies.

• Startup Sequencing:
  If one power supply is turned on before the other, the second power supply may fail to start. Using circuit breakers helps prevent this issue, allowing both power supplies to operate simultaneously.
  Below is an example of power supplies in parallel for battery charging in the system.

Follow below is an example of how the power supplies can be connected in parallel: