Thursday, October 12, 2023
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Motorhome Inverters- Every part you should know


Contemplating an inverter in your motorhome or campervan? Unsure what measurement you want or which is finest? Don’t worry- right here’s all the pieces you should learn about selecting the very best motorhome inverter for you.

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Motorhome inverters- the fundamentals

I’ll be trustworthy, I don’t actually ‘get’ electrics. And I positively don’t get something which entails taking part in round with motorhome energy techniques and batteries which might kill me if (when!) I get it fallacious.

Nonetheless, ever since our very first motorhome, we’ve agreed an inverter is a necessary piece of package for the way in which we use the van, so, when my final one broke (my fault!), I wanted to get a brand new one.

So, the primary query is: why?


Do you want an inverter in your van?

Most individuals who use campsites repeatedly in all probability don’t must hassle about becoming an inverter of their motorhome or camper. In any case, the concept of it’s to alter 12v energy from the leisure battery into 230v energy which can be utilized to energy home equipment like laptops and hairdryers.

So, if you happen to already primarily use campsites and their energy provide, you possibly can already energy/ recharge these gadgets.

Nevertheless, we LOVE motorhome wild tenting/ parkups. We like staying off-grid, or utilizing aires in France, or staying in forestry automotive parks.

None of those have energy accessible, so we should be self-sufficient. While the motorhome can survive for a number of days off-grid, gadgets like my laptop computer (which this whole motorhome weblog was constructed on) or our drone, or our Ecoflow energy station, all want topping up to ensure that us to proceed to spend time off-grid.

We additionally tour with motorbikes, and infrequently use the inverter to recharge our helmet intercoms or our heated clothes battery packs.

For that motive, for us, it’s a van life important and permits us to be way more versatile fairly than needing campsites on a regular basis. (See extra motorhoming necessities right here.)


What measurement inverter do you want in a motorhome or campervan?

Ha, isn’t that the vital query!?!

In contrast to diesel engines, you don’t wish to work an inverter onerous. You really need there to be some wiggle room.

Nice, so simply purchase the most important one the market?

Nope- coz that’s a)- costly and b)- will drain your leisure battery tremendous quick. There must be a bit extra thought into what measurement inverter you should match.

Inverters usually are not 100% environment friendly. The truth is, for many inverters, you possibly can count on about 80-85% effectivity. Subsequently, to know the dimensions you want, take the most important equipment you wish to energy from the inverter, see what it attracts (enter energy), then be sure you add a minimum of 20%- that’s the dimensions inverter you want.

There are two kinds of energy you’ll see on an inverter- steady energy output and peak energy output.

Peak energy is short-duration, often on start-up. Steady is… steady. That is the quantity you should have a look at whenever you’re selecting one to buy.

My first inverter was 300w. As you possibly can see within the video, it wasn’t large enough to do what I wanted it to do. The brand new one is 2000w!

That is the one we simply fitted:


Motorhome inverters- Pure sine or modified sine?

Okay, if you happen to perceive electrics look away now, as a result of that is in all probability extra fundamental you then need it to be.

A pure sine wave offers a clean voltage curve, which is what most home equipment are designed to run on. A modified sine wave has ‘steps’ the place the facility will increase or decreases in jumps. These jumps in voltage may cause issues with delicate electrics, like laptops, TVs, espresso makers, energy stations and CPAP machines. It may possibly additionally trigger overheating of transformers and chargers.

Nevertheless, they’re typically high quality to energy issues like hairdryers, energy drills, battery packs and so on.

As a result of they’re not as refined, modified sine wave inverters are MUCH cheaper to purchase than pure sine.

NOTE: Should you’re shopping for off Amazon or on-line, many abroad locations state their machine is pure-sine when it’s not. Do your analysis rigorously. You may see the one we acquired within the Youtube hyperlink above.


Becoming an inverter in a motorhome

Right here’s how we fitted our new inverter in our motorhome. It wasn’t too troublesome BUT, if you happen to’re in any method not sure, please ask an expert to assist so that you don’t damage your self or injury your techniques.

Suggestions for becoming a motorhome inverter

Listed below are some ideas that will help you:

  • Don’t let something contact the battery terminals collectively
  • Disconnect the damaging first and fix the damaging final.
  • Inverters are probably the most current-heavy gadgets you possibly can connect to a 12V battery. Use a number of fuses as security breakers.
  • Fashionable battery cables have the continual present ranking marked on them – be certain that your fuse by no means exceeds these ranking.
  • Make certain the wires/ leads are the right gauge. Some inverters are provided with cheaper leads which aren’t robust sufficient to do the job.
  • Some small inverters will be powered from a 12V cigarette socket. DON’T plug thes into the socket within the cab as that’s powered by your automobile battery and can drain it. Solely use it from sockets within the hab space that are powered out of your leisure battery.
  • Keep in mind that simply because it may be powered by a cigarette lighter, doesn’t imply the cigarette lighter in your van is robust sufficient to energy it; a 120W inverter can draw round 10A, which is able to probably blow a cigarette-lighter fuse at full energy.
  • Attempt to place the inverter as near the leisure battery as attainable to maintain the cables quick (max 2m for any inverter over 2000w). This reduces the temperature and voltage drop within the cables.
  • If this isn’t attainable, enhance the diameter of the cables.

Video of us becoming an inverter in our motorhome

Right here’s a video of us becoming an inverter in our motorhome.

NOTE: I forgot to incorporate the crucial clip of us placing a fuse on the constructive. Should you’re unsure how to do that, please ask an expert.

We hope you discovered the video helpful. Should you did, we’d find it irresistible if you adopted us on Youtube. New movies with ideas for motorhoming and campervanning within the UK and Europe are launched weekly.


Learn how to use a motorhome inverter

The best method to make use of a motorhome invertor is to plug your machine or equipment straight into the 230v 3-pin plug socket really on the inverter.

Alternatively, you should use an extension result in make it simpler to entry, however don’t overload the inverter with an excessive amount of.

It’s actually sophisticated to get an inverter to run the prevailing 3-pin sockets within the habitation space of your motorhome, so attempt to keep away from pondering of it like that.

We ONLY use our inverter while we’re driving. This permits us to cost gadgets prepared to be used after we cease AND stops us from unintentionally draining the leisure battery. We additionally by no means use it for longer than an hour and it’s hardly ever working at something near full energy.


How lengthy will an inverter run off a motorhome battery?

Like all the pieces else, this may depend upon the dimensions of the inverter, the dimensions of your motorhome leisure battery/ batteries and the dimensions of the machine(s) you’re powering.

Nevertheless, to provide you an thought, a 2000w inverter (just like the one we put in), working at FULL POWER (which is unlikely for a protracted interval), might flatten a 100A motorhome leisure battery in 36 minutes.

Right here’s the maths:

  • 2000w/ 12v= 166.6 amps/ hour
  • 100amp battery/ 166.6= 0.6 hours (36 minutes)

BUT- you don’t wish to flatten your battery, so in actuality you solely have about 18 minutes of full-power use earlier than you should cease. That is one more reason we solely use the inverter while driving AND solely after we’ve been driving some time, so the battery has had time to get a minimum of just a little bit recharged.


In the way in which WE use the motorhome, an inverter is crucial. Nevertheless it’s not for everybody. Earlier than you lay out on one, be sure you assume it’s one thing you’ll positively want.

Need extra ideas for motorhoming?

Listed below are some extra concepts you may discover helpful:

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