Energy for a motorhome trip – it’s worth knowing before you go! – – Automotive Journal

Motorhomes are an excellent alternative to traditional recreation in holiday homes or hotels, offering holidaymakers independence, comfort and freedom of travel. How do you correctly calculate the energy requirement in our motorhome and choose the right battery for a successful holiday trip? – this is the question users ask most often.

Energy balance

Calculating the energy balance is much easier when, for example, like Exide, the battery manufacturer gives the specification in Wh (watt-hours) instead of Ah (ampere-hours). This allows users to easily calculate the average daily energy consumption of the on-board equipment. The list should include all power consuming devices, such as: refrigerator, water pump, TV, navigation equipment and emergency systems, as well as additional electronic equipment that you take with you on a trip, such as laptops, mobile phones, cameras or drones.

To calculate the energy requirement of your motorhome, you need to multiply the energy consumption of all on-board units on our list by their estimated operating time (h/day). The results of these actions give us the sum of the required energy, expressed in Watt-hours. By adding up the watt-hours consumed by all devices between successive charges and adding a safety margin, we get a result that makes it easier to select one or more batteries.

Examples of energy consumption between charges:

Formula: B × h = Wh

  • Water pump: 35 W x 2 h = 70 Wh
  • Incandescent lamp: 25 W x 4 h = 100 Wh
  • Coffee maker: 300 W x 1 h = 300 Wh
  • TV: 40 W x 3 hours = 120 Wh
  • Fridge: 80 W x 6 hours = 480 Wh

Total: 1,070 Wh

OUR ADVICE: To avoid unpleasant surprises during the trip, it is worth multiplying the sum by the so-called safety factor, namely: 1.2. In this way we get the so-called safety margin.


1.070 Wh (sum of required energy) x 1.2 (safety factor) = 1.284 Wh. The margin of safety is 214.

RV battery – what to remember?

Campers run on two types of batteries – starting, necessary to start the engine, when selecting it we must follow the recommendations of the car manufacturer and on board, used to power all devices in the living space. The choice of a utility battery depends on the equipment of the motorhome used by the user and not on the parameters of the vehicle.

Well prepared energy balance helps us choose the right on-board battery. But not only these parameters are worth considering before buying. Considering the battery model we want to buy and the mounting options, we need to consider whether the structure of our vehicle allows the battery to be installed in a horizontal or side position, and then select the appropriate device model for it.

if we care short battery charging timelet’s choose it with the “quick top up” option, which even cuts the time by half, like completely maintenance free Exide Equipment AGM from the Marine & Leisure range, made in the absorbent glass mat technology, characterized by a high resistance to deep discharge. We should also remember that choosing a maintenance-free battery will make you forget about the need to top up the electrolyte in it. But not only that – these models are also less likely to self-discharge.

Users for whom it is essential to the battery took up as little space as possible in a camper they can put on a model Equipment Gel, which will save them up to 30% of the space in their recreational vehicle. By the way, they get a completely maintenance-free battery, suitable for long storage periods, characterized by excellent cycling performance and high resistance to vibrations and tilting.

When you start your adventure with motorhome tourism, remember that a well-calculated electricity demand and the right choice of battery form the basis for a successful holiday in a mobile home. During our travels, we will not forget the routine, uncomplicated, but necessary check of the motorhome power system, and it will be an unforgettable holiday.

About Exide Technologies

Exide Technologies, based in Paris, is a leading provider of advanced energy storage solutions for the automotive and industrial markets. The company designs, manufactures and delivers both traditional solutions and future technologies related to batteries, which have a wide range of applications – from automotive to off-road to materials management, industrial, railway and defense.

Exide Technologies provides world markets with the highest quality battery technology, expertise and added value under many well-known brands. As an OEM supplier to leading automotive and industrial manufacturers, Exide Technologies is involved in many groundbreaking energy storage projects that enable innovative solutions to be brought to market.

Owning two development and research centers, nine manufacturing plants and three recycling facilities in Europe, Exide meets the highest standards to power the world with the most energy-efficient solutions and help customers maximize efficiency and productivity.

The group has a turnover of 1.5 billion euros per year.


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