Total wattage = 12,500 watts Divide the total wattage by your home's voltage (usually 240V for most systems) to get the required amperage: 12,500 watts ÷ 240 volts = 52 amps However, electrical systems are typically designed with a safety margin. An electrical panel, also known as a breaker box or distribution board, is the central hub of your home's electrical system. Each circuit powers specific areas or appliances. What. For smaller homes, a 100-amp panel may suffice. For tailored advice, it's always best to consult with a licensed electrician. Finally, choose safety devices like RCBOs and Surge Protection Devices (SPD) for the best protection against faults and lightning.