The idea of ??using the auxiliary battery of the bed car is to use a 1.5-2 kWh auxiliary battery, because I am worried that the sound insulation problem of the vehicle will be affected by drilling holes when connecting power from the car battery. In addition, there are The 220V jack, although not very powerful, only 300W, I think it should be enough. Before setting off, fill the auxiliary battery with mains electricity at home, and then keep charging it while driving. This should be enough for cooking with a 600W rice cooker and cooking with a 1500W electric wok every day.

If you cook two vegetables for each meal, 1-20 minutes is enough. In this case, whether the auxiliary battery will lose power and how big a rectifier should be used depends on your power requirements. 1500 600 = 2100 is 2.1kw. The inverter power must be above 2.5KW, and 3KW is ideal.

If three meals a day counts as one hour of cooking time, 12Vx250AH=3000w=1 hour, that is, a 250AH battery can meet your cooking needs for the day, and you have to go back to the hotel to charge at night. However, it is safer to use 48V or above when using such high-power electrical appliances, or separate cooking and cooking.

In addition, your idea is not to punch holes, so how can you charge it while driving? Should I use the 300W socket in the car to charge?

300w divided by 220V = 1.5A

Charging time = Capacity divided by charging current. To fully charge a 250AH battery with a 1.5A power supply, 250ah divided by 1.5 equals 166 hours. So if you change to a charger with a larger amperage, you don’t know whether your car can afford it or there is a risk of overheating and burning.