Do I need an inverter/charger or just an inverter?

Right, so I'm setting up a static caravan as a weekend retreat and I'm trying to work out if I need to go the full inverter/charger combo route or if a standalone inverter would do the job.

Currently running a 5kWh LiFePO4 battery bank (Victron LiFePO4 Smart), and I've got solar sorted — about 2kW of panels that charge nicely in summer. The caravan's got the usual bits: fridge, heating, lights, kettle, occasional laptop charging.

Here's where I'm unsure though. I could rely entirely on solar + battery during the day and weekends, but I'm thinking about fitting it with mains hookup when the caravan's at a fixed site. Basically, I want the ability to top up the batteries from grid power when solar's rubbish in winter or if I've had mates round draining everything.

So the question is: would a standalone inverter (for 240V appliances) plus a separate charger do the job, or should I bite the bullet and get an all-in-one unit like a Victron Multiplus?

I know the combo units cost more upfront but I've heard they're more efficient and take up less space, which matters in a caravan. Anyone running this setup? What would you recommend?

Cheers for any input.

@SaltyMaker - depends entirely on how you're planning to charge your batteries, mate.

If you've got a generator or mains hook-up available at the site, an inverter/charger combo makes sense - it'll handle both your AC load and top up your batteries automatically when connected. Saves you faff and keeps everything in one box.

However, if you're running purely off solar panels with no external charging source, a standalone inverter is fine - your panels charge the batteries directly via an MPPT controller, and the inverter just converts DC to AC as needed.

What's your charging setup looking like? Are you planning on solar, generator, or mains hookup? That'll really determine which way to go. Also worth considering future-proofing - if there's any chance you'll add a generator later, the combo unit might be worth the extra spend upfront.

What size system are you thinking, roughly?

@SaltyMaker — static caravan setup changes things a fair bit. An inverter/charger combo (think Victron Multiplus or similar) makes sense if you're planning to hook shore power when you're there. You get proper battery charging with proper voltage regulation, plus you can run AC loads when the mains is available. Standalone inverter won't handle that properly — you'd be relying on a separate charger or solar/wind, which gets messy.

That said, if your site has permanent mains connection and you're just after backup/off-peak power, a decent inverter alone might suffice. But realistically, for a weekend retreat where you want reliable charging and the ability to switch between sources without fannying about, go combo. The Multiplus II is pricey but bulletproof. Cheaper options like the Epever or Luxpower combos work fine too depending on your power budget.

What's your charge source currently?

The question really hinges on whether you're planning to charge from mains or off-grid sources. @RussMitchell75 and @Boycie have got the right idea.

For a static caravan, if you've got permanent or semi-permanent mains access on site, an inverter/charger combo like the Victron Multiplus-II makes genuine sense. You'll get seamless switching between mains and battery, plus proper three-stage charging which extends battery life significantly.

However, if you're purely solar-fed with no mains tether, a standalone inverter (Renogy, Fogstar, etc.) paired with an MPPT controller is often more sensible and cheaper. You're not paying for charging capability you won't use.

The deciding factors:

• Do you have mains hookup available? → Combo wins
• Pure solar/generator backup only? → Inverter + MPPT is cleaner
• Occasional fast-charging needs? → Combo justifies itself

What's your power source situation looking like? That'll narrow it down considerably. Also worth considering battery chemistry—LiFePO₄ changes the mains charging equation entirely.

@SaltyMaker — I run a similar setup in a shepherds' hut, so I'll add what I've learned the hard way.

The real question isn't whether you need an inverter/charger—it's whether you'll have mains available at the caravan. If you're hardwired to a site supply, a combo unit is genuinely worth it. The Victron Multiplus II handles both inversion and charging seamlessly, and you get automatic switchover without thinking about it. Saved me loads of faff when we had a supply issue last winter.

However, if you're genuinely off-grid with just solar and battery, a standalone inverter is fine. You won't be charging from mains anyway, so the charger function sits idle. I'd only add an inverter/charger if you're using a generator as backup—then it makes sense to have the charger ready when the genny runs.

What's your charging plan? That's what determines it. Solar only, or will you have mains/generator access?

@SaltyMaker — good question, and it does depend on your specific setup, but here's the practical bit:

If you're only running 12V leisure equipment and small AC loads (kettle, microwave, telly), a standalone inverter is fine and cheaper. But static caravans usually benefit from an inverter/charger combo because:

1. Mains hookup — if you're plugging into a site's hookup or running a generator, you want the charger function to keep your batteries topped up automatically. Otherwise you're manually switching things.

2. Convenience — the combo handles charging and inverting seamlessly. One device, cleaner install.

3. Future-proofing — if you later add solar panels, the better combos (Victron, Epever, etc.) integrate brilliantly with MPPT controllers.

That said, if it's truly minimal usage and you're happy manually managing a small genset or just accepting lower battery autonomy, a standalone inverter works. Just means more faffing about.

What size battery bank are you looking at, and how often will you

If you're plugging into mains at the weekends, you absolutely need the inverter/charger combo — otherwise your batteries just sit there sulking while you've got 230V available. Standalone inverter is fine if you're genuinely off-grid and only drawing down stored power, but that's rare for a static setup.

The Victron MultiPlus range is the standard for a reason — handles both inversion and mains charging seamlessly. @JYT_Solar's shepherds' hut approach probably mirrors yours anyway.

Real question: how often are you at the caravan, and do you have mains hookup? That's what determines whether you're throwing money at a charger you'll never use, or kicking yourself later when the battery's flat and there's no way to top it up from the site's supply.

Depends what you're actually doing with it. If you're just running 12V stuff off batteries when you're there, standalone inverter's fine. But if you want to top up your batteries from a generator or hook up to a leisure battery charger when you've got access to shore power, you'll want the combo unit.

I've got both setups — Victron Multiplus in the static, just a basic Renogy inverter in the shepherds' hut. The caravan gets proper use so it made sense to go combo there. The hut's more basic, so standalone does the job.

Real talk though: if you're doing this on a budget, start with the inverter, then add a proper charger later when you realise you need it. I see people do that all the time and it works out fine.

What's powering your batteries — solar only, or you planning mains/generator access?

@SaltyMaker — I've been down this road with my narrowboat setup, and the deciding factor is really whether you want to charge your batteries while you're at the caravan.

If you're just popping down for weekends and running off what's already in your batteries, a standalone inverter does the job fine. But here's where it gets interesting: if you've got mains available and want to keep your batteries topped up between visits (especially important in winter), you need that charger function built in.

I went with a Victron MultiPlus because it handles both directions seamlessly. Grid power comes in, charges the batteries, and the inverter seamlessly takes over if the mains drops. Sounds excessive for a static setup, but it's saved me multiple times when I've forgotten to charge before heading out.

The combo units aren't dramatically more expensive than buying separate units anyway. What's your power source situation — are you relying on solar alone, or have you got mains hookup available?

Depends on your mains situation, really. If you're hooking up to a caravan site's electric hook-up, you'll want the combi unit so you can charge your batteries from the mains while you're there and have an inverter for any 230V kit you might need when unplugged. Saves you having two separate units taking up space, which matters in a static caravan.

That said, if you're genuinely off-grid most of the time and only running 12V/24V appliances (lights, fridge, USB stuff), a standalone inverter is simpler and cheaper. I use a Victron Multiplus in my setup and it's been solid — handles charging from a generator as well as mains when needed.

The real question: how often are you mains-connected versus living off batteries? If it's 50/50, the combi makes sense. If you're rarely plugged in, just go inverter and sort charging separately.

What's your power budget looking like? That might help narrow it down.

Been there with the narrowboat — the real question is whether you'll have shore power available at the site. If you're plugged in most weekends, an inverter/charger like a Victron MultiPlus saves you mucking about swapping between modes. Standalone inverter only works if you're genuinely off-grid or happy managing batteries manually. What's your typical setup look like power-wise?