AMPSEVEN 1000W ZVS Low Voltage Induction Heating Board Module/Tesla with Coil 1. 12-48V low voltage power supply. Rated current:20A . Rated power:1000W, the bigger voltage, the higher power. 2. We tested when it works 53V power supply, current can reach 30A.It can be used for DIY players to make small parts quenching, annealing and other heat treatment, heating fast, very convenient. 3. 24V input and no load current is about 3A . 48V input and no load current is about 6A 4. The higher voltage, the higher current when heating the same things, the effect is better, but at the same time heating is also higher, therefore the choice of input voltage is based on your need. Such as heating under 1cm square small objects, use the 24 v voltage. 5.buyer need self-provided power and water cooling device