If you’re thinking about upgrading your motorhome’s leisure battery to lithium, you may have come across our three off-grid kits: Essential, Plus and Ultimate.
But what’s the difference between them, and how do you know which one is right for your motorhome?
The answer depends on how you like to travel, what you want to power and how long you want to stay away from an electric hook-up.
You don’t necessarily need the biggest battery or the most powerful inverter. The best system is the one that gives you the freedom you want, without paying for features you’re unlikely to use.
Let’s take a closer look at what each kit offers.
1. Off-Grid Essential: More power for everyday motorhome life
If you mainly want to keep your everyday motorhome comforts running while spending longer away from hook-up, Off-Grid Essential could be the right place to start.
It’s designed around the 12V appliances most motorhome owners use every day, including:
- Lights
- Fridge
- Water pump
- Heating fan
- TV
- Phone charging
The kit includes a 200Ah lithium battery, giving you a substantial store of usable energy. It also includes a 200W solar panel, 50A drive charging and 35A hook-up charging to help replenish the battery.
One important thing to understand is that Essential doesn’t include a 230V inverter. That means it’s intended for your motorhome’s everyday 12V equipment, rather than mains-powered appliances such as a coffee machine or air fryer.
For someone who enjoys weekends away, occasional wild camping or longer stays without needing to run household-style appliances, that may be everything they need.
At around 25Ah of daily 12V use, the Essential kit can provide over five days off-grid. Actual running time will depend on your appliances, how much you use them and the amount of charge you generate from solar or driving.
Essential could suit you if:
- You mainly use 12V appliances.
- You want to spend longer away from electric hook-up.
- You want solar and drive charging as part of your setup.
- You don’t need to run 230V mains appliances from your battery.
Off-Grid Essential starts from £4,370, including installation.
Find out more about Off-Grid Essential
2. Off-Grid Plus: Everyday power with the freedom to use 230V appliances
Perhaps you’re happy with your existing 12V appliances, but you’d also like to make a coffee, use an air fryer or dry your hair without plugging into a campsite’s electric hook-up.
That’s where Off-Grid Plus comes in.
It includes the same 200Ah lithium battery and charging equipment as Essential, but adds a 2kW inverter.
An inverter converts the battery’s 12V power into the 230V supply used by many household appliances. This gives you more flexibility when you’re away from mains electricity.
For example, the Plus kit is designed to support occasional use of appliances such as:
- A coffee machine
- An air fryer
- A travel hair dryer
- A CPAP machine
The important word here is occasional. Appliances that produce heat or cook food can use a lot of energy, so how long you run them makes a big difference to how quickly your battery charge is used.
The inverter also has a maximum power limit. With Plus, you should use compatible appliances within that limit and follow the system’s guidance on running one appliance at a time.
The benefit is that you get the everyday 12V capability of Essential, with the added convenience of selected 230V appliances.
Plus could suit you if:
- You want all the everyday 12V features of Essential.
- You’d like to use a coffee machine or air fryer occasionally.
- You want to power selected 230V appliances without needing a campsite hook-up.
- You don’t need the much larger battery capacity of Ultimate.
Off-Grid Plus starts from £5,190, including installation.
Find out more about Off-Grid Plus
3. Off-Grid Ultimate: For more demanding off-grid adventures
If you spend longer off-grid, use more power-hungry appliances or want to bring more of the comforts of home with you, Off-Grid Ultimate offers a significant step up.
The biggest difference is the battery capacity. Ultimate includes a 500Ah lithium battery, compared with the 200Ah battery in Essential and Plus.
It also includes a more powerful 3kW inverter, giving you greater scope to run higher-demand 230V appliances.
The system includes:
- 500Ah lithium battery
- 200W solar panel
- 60A drive charging
- 35A hook-up charging
- 3kW inverter
This combination is designed for motorhome owners whose power requirements go beyond everyday 12V use and occasional 230V appliances.
For example, you might want to:
- Work remotely from your motorhome and use a laptop for extended periods.
- Run a CPAP machine overnight.
- Cook using an induction hob.
- Boil a kettle while away from hook-up.
- Spend longer periods off-grid with a larger reserve of battery capacity.
A larger battery gives you more stored energy, while the 3kW inverter provides greater power output for suitable appliances. Both matter if you want to run more demanding equipment.
Of course, even a large battery isn’t unlimited. Appliances such as induction hobs and kettles can consume energy quickly, so your actual running time will depend on what you use and for how long. Your charging arrangements also remain important, particularly if you spend several days parked in one place.
Ultimate could suit you if:
- You regularly spend several days off-grid.
- You want to use 230V appliances more frequently.
- You work from your motorhome or have specific power requirements.
- You want a much larger battery reserve and a more powerful inverter.
Off-Grid Ultimate starts from £6,750, including installation.
Find out more about Off-Grid Ultimate
4. Essential vs Plus vs Ultimate: What’s the difference?
Here’s a quick comparison of the three kits:
| Feature | Essential | Plus | Ultimate |
|---|---|---|---|
| Lithium battery | 200Ah | 200Ah | 500Ah |
| Solar panel | 200W | 200W | 200W |
| Drive charging | 50A | 50A | 60A |
| Hook-up charging | 35A | 35A | 35A |
| Inverter | Not included | 2kW | 3kW |
| Best suited to | Everyday 12V use | Occasional 230V use | Heavier and longer 230V use |
| Starting price | £4,370 | £5,190 | £6,750 |
Prices are starting prices and may change. The final specification and quotation will depend on your vehicle and requirements.
The simplest way to think about the three options is:
- Essential: You want to keep your everyday motorhome appliances running for longer.
- Plus: You want the same everyday power, with the option to use selected 230V appliances.
- Ultimate: You have higher power demands and want a much larger battery reserve with a more powerful inverter.
5. Do you really need Ultimate?
It’s tempting to assume that the biggest system must be the best investment. But that’s not necessarily the case.
If you mainly use your lights, fridge, heating fan, TV and phone chargers, you may find that Essential gives you everything you need.
If you enjoy the occasional coffee from a mains-powered machine or want to use an air fryer while wild camping, Plus could be a better match.
Ultimate is designed for a different type of user: someone who wants to use more demanding appliances, work from their motorhome or spend longer periods away from hook-up.
Think about how you actually use your motorhome rather than how you might use it one day. There’s little point paying for a 3kW inverter and a 500Ah battery if your normal trips only require everyday 12V power.
On the other hand, if you know you’ll regularly be using an induction hob or other high-demand appliances, choosing a system with more capacity from the outset could make sense.
6. Why does professional installation matter?
Whichever kit you choose, it’s important to remember that a lithium upgrade is about more than simply replacing your existing leisure battery.
The battery, inverter, solar charging, drive charging, mains charging, wiring and protective equipment all need to work together.
At Bristol Caravans, we design and install complete lithium systems, making sure the components are correctly matched to your motorhome and how you intend to use it.
We also take care of the necessary electrical protection and system setup, so you’re not left trying to piece together different components yourself.
If you use your motorhome throughout the winter, we can also discuss options such as self-heating lithium batteries to help manage charging in colder conditions.
The aim is to give you a reliable system that works as it should, wherever your travels take you.
7. Which off-grid lithium kit should you choose?
There isn’t one perfect lithium setup for every motorhome owner.
The right choice comes down to three things:
- What do you want to run? Everyday 12V appliances, occasional 230V appliances or more demanding equipment?
- How long do you want to stay off-grid? A night or two, a long weekend or extended periods away from hook-up?
- How do you recharge? Will you rely on solar, charge while driving or use electric hook-up between trips?
If you’re still unsure, that’s where we can help.
At Bristol Caravans, we can talk through your requirements, look at your existing electrical setup and help you decide whether Essential, Plus or Ultimate is the best fit.
Ready to spend longer off-grid?
Explore the three kits or get in touch with Bristol Caravans for a free personal assessment and quotation.
Explore Off-Grid Essential | Explore Off-Grid Plus | Explore Off-Grid Ultimate
More freedom, less reliance on hook-up, and a lithium system that suits the way you travel.
