There are several reasons why it is important to change consumer units to add surge protection and RCBO (Residual Current Circuit Breaker with Overload protection) protection:

Protection against surges: Surges, also known as voltage spikes, can damage electrical devices and appliances in the home. A surge protection device helps to prevent this damage by redirecting excess voltage away from your electrical devices.

Safety: RCBOs provide additional safety to your electrical system by detecting and breaking the circuit in case of a residual current, which can occur in case of a fault or leakage of current. This helps prevent electrical shocks and fires.

Energy efficiency: By providing protection against surges, RCBOs can help prolong the lifespan of your electrical devices, making them more energy efficient in the long run.

Peace of mind: Installing surge protection and RCBOs can give you peace of mind knowing that your home and its electrical devices are protected against potential electrical hazards.

In conclusion, adding surge protection and RCBOs to consumer units is an important step in ensuring the safety and efficiency of your electrical system. It is recommended to consult a qualified electrician to assess your current electrical setup and install these devices if necessary.