1500 watts. Commonly, the higher the wattage, the greater would be its hotness. That means grills with 1500 watts or more, will heat up faster and hotter than a 1000watts. The power requirements should be centered on your needs. If you are intending to use the grill for sandwiches or preparing burgers, you will only need the 1000 watts indoor grills. On the other hand, if you want to prepare demanding servings, you should go in for an indoor grill with higher power wattage.