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.
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 appliances that use electricity, 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. Adding together 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 machine: 300 W x 1 hour = 300 Wh
• Television: 40 W x 3 h = 120 Wh
• Fridge: 80 W x 6 hours = 480 Wh
Total: 1,070 Wh
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?
Motorhomes are supported by two types of batteries: the starter battery, which is necessary to start the engine, when choosing which one to follow the recommendations of the car manufacturer, and the built-in battery, which is used to power all devices in the living space. to provide. 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.
A well-prepared energy balance helps us to 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 want a short battery charging time, opt for the one with the “fast charge” option, which even cuts the time in half, such as the completely maintenance-free Exide Equipment AGM from the Marine & Leisure range, made in the absorption 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 important that the battery takes up as little space as possible in the motorhome can opt for the Equipment Gel model, which saves 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 are 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’s power system, and it will be an unforgettable holiday.