Transformers and Power inverters are the main power supply device that converts AC power to the DC for the entire electrical equipment components. Different Transformers and Inverters are used for various purposes. Certified offers the best affordable recycled old stock, new and fully refurbished high quality transformers as well power invertersfor for all major appliances including microwaves, fridges, dryers and washers etc. High Voltages or Low Volatges are reffered to DC output voltage while both transformers feed standard 120/240V AC power. Refurbished, New Old Stock (NOS) and New OEM. All transformers come with standrad one year warranty. Extended warranty is also avalable.