I use a 1000w sine wave inverter because it’s very efficient. Here’s the 750w kettle that I use: Bodum Bistro Electric Water Kettle, 17 Ounce, Black https://www.amazon.com/dp/B00851LRR6/ref=cm_sw_r_cp_api_glc_fabc_kCl0FbCC5C26A?psc=1