This can be achieved with a single 12-volt battery or several 12-volt batteries wired together in a parallel circuit. Your RV’s 12-volt system needs to have a total of - you guessed it - 12 volts. RV Power Sources: The Low-Down on Batteries The 120-volt system is powered by an RV electrical hookup plug or a generator, and it powers daily use items like kitchen appliances, your TV, and other large electrical appliances. The 12-volt system is powered by a battery (or in some cases, multiple batteries), and it powers things such as the start-up on your water heater, furnace, and refrigerator, plus most of the lights in your RV’s living space, your water pump, your carbon monoxide detector, and a number of other things. Your RV has two separate electrical systems: a 12-volt DC electrical system and a 120-volt AC system. With AC electricity, on the other hand, the current changes directions periodically - which is why it’s called an Alternating Current. We should also briefly cover the difference between AC and DC electrical systems, since your RV has both! In a DC system, the electricity only flows in one direction (which is why it’s called a Direct Current system). Exceed your available wattage, and you’ll trip your RV electrical system’s circuit - which you may know first-hand if you’ve ever tried to run your microwave and hair dryer at the same time! As long as you stay under the amount of available wattage, your circuits will run smoothly. If you want to know how many different electrical devices you can have on at one time in your RV (or in your home, for that matter), this formula will tell you. ![]() As an equation, it’s written as: watts = amps x volts, or W = A x V. Watts, or overall power, is a product of current, or amps, and voltage. Therefore, it’s a good idea to review a formula you learned in high school but have probably long since forgotten. Whether you’re in an RV or your home, you will never have access to an unlimited amount of electrical power. It’s good for RV owners who have good wifi, don’t want to wait on UPS, or like to keep everything digital. The Online version is $197 and includes all of the same videos laid out in chapters using our online portal.This is perfect for RVers who may not have access to good wifi or likes to have a physical copy. It also includes a copy of the online version. The USB version is $297 and includes booklets, a tweaker screwdriver, and a USB Drive with all of the HD videos. ![]() The RV Owners home study course comes in two options. Click here and use code RVSHARE for 5% off all courses. If you want to learn more about RV electrical and how to maintain and repair RV issues on your own, NRVTA’s program is perfect for you. However, we will give you some baseline knowledge and vocabulary on RV wiring so that you can understand what’s going on with all of your batteries, panels, wires, and cables. you won’t learn how to rewire your entire RV - this isn’t RV wiring for dummies!). We realize that the majority of RVers are not electrical engineers, so we won’t get too technical (i.e. If you plan to use your RV on a regular basis (and especially if you’re going to live in one full time), a basic understanding of RV wiring and power sources can help you make informed decisions about where to draw power from - and also help you troubleshoot if something does go wrong. And as awesome as it is to have access to all that stuff on the road, if you want it to keep working smoothly without interruption, it helps to have a basic understanding of how your RV’s electrical systems work. Your RV electrical system is what allows you to utilize many of the modern conveniences that you’ve become accustomed to, from overhead lighting and vent fans to your HVAC system and refrigerator.
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