Cheap Chinese inverters — any good ones?

Looking at upgrading my off-grid setup and trying to keep costs down. Currently running a Victron 3000VA but I'm adding an EV charging circuit and need more capacity without blowing the budget to bits.

Been eyeing some of the cheaper Chinese options — Growatt, Deye, that sort of thing. They're roughly half the price of another Victron unit, which is tempting when you're self-funding everything.

My concern is reliability though. I'm in a pretty remote location, so if something fails I'm not getting an engineer out quickly or cheaply. The Victron's been solid for three years with minimal fuss, which has real value when you can't just call someone the next day.

A few questions for anyone who's gone the Chinese inverter route:

1. Are the warranties actually worth anything if something goes wrong, or is it a nightmare dealing with returns?
2. Has anyone paired one alongside an existing Victron system? Any compatibility issues with the monitoring or battery management?
3. For EV charging specifically — do they handle the power draw spikes decently, or would I be better sticking with one quality unit rather than daisy-chaining cheaper ones?

I'm not against saving money, but I also can't afford downtime in winter when solar's rubbish anyway. What's the real-world experience been for people here?

You'll struggle to find a genuinely reliable cheap Chinese inverter at the 5-10kW range you'd need for EV charging alongside your existing load. I've seen too many forum posts end in tears with warranty claims that go nowhere.

That said, Deye and Sunsynk units aren't terrible if you're after a hybrid inverter — at least they've got some UK support infrastructure now. But honestly? For EV charging specifically, you're better off adding a smaller dedicated charger on a separate circuit rather than upgrading your main inverter.

What's your current battery capacity and what kW are you actually drawing for the EV? A Victron 3000 is solid kit — might be worth keeping it and running the charger direct from genset or AC input when needed. That's what I did with my narrowboat setup and it works a treat. False economy upgrading to an unknown brand when you've already got something battle-tested.

What's your budget looking like?

Mate, you're not keeping costs down with a cheap Chinese inverter—you're just postponing them until the magic smoke escapes at 2am on a Sunday when everything's closed.

That Victron 3000 you've got? It'll outlive your cabin. Chinese units at that power level are a lottery: some folk swear by them, most end up swearing at them. For EV charging specifically, you need rock-solid power delivery or you're nuking your car's onboard charger.

If budget's tight, look at refurb Victrons or step up incrementally—add a second 3kVA unit in parallel rather than one dodgy 10kW unit. Or bite the bullet on a proper Growatt/Sunsynk if you want to split the difference between reliability and cost.

What's your actual power draw without EV charging?

Yeah, spent three years nursing a Growatt through winters on the narrowboat before it decided to brick itself mid-January—saved £800 upfront, spent £1200 on a replacement plus the joy of frozen pipes. The Victron you've got is doing you a solid; sling a second one in parallel if you can stretch to it, or look at hybrid route with a smaller Chinese unit handling just the EV circuits while your existing kit does the serious graft. @MultiPlusNerd's right about the smoke—except with cheap kit it escapes quietly so you don't notice until your batteries are mysteriously flat and your warranty's expired.

Fair points from you lot, but I'm curious about the middle ground here. @OffGridFreak, what's your actual budget and how often are you pulling that EV juice?

The reason I ask is I've got a Fogstar 5kW in my cabin setup and it's been rock solid for two years, but that's nowhere near continuous duty. If you're doing daily EV charging, you're looking at proper runtime and heat management—that's where the cheap units tend to give up the ghost.

Have you considered stacking a second Victron instead? Bit pricey upfront but at least you know what you're getting. Or are you dead set on a single larger unit?

What's drawing the EV power—wall charger or portable?

I've been down this road in the van conversion. Thought I'd save a grand by going cheap, ended up replacing the thing twice in four years. The real killer isn't the initial failure—it's the downtime when you've got guests in the cabin office or you're mid-charge and the thing just... stops.

That said, not all budget options are rubbish. I've seen Growatt units soldier on if you're not asking them to do heavy lifting in winter. The key is matching the inverter to your actual duty cycle, not just raw wattage.

For EV charging specifically, you need rock-solid stability. That's where the cheap units fall apart hardest. If you're serious about it, a second Victron or a decent Victron/Growatt hybrid makes more sense than gambling on an unknown brand. What's your actual winter load looking like?

@OffGridFreak, I'd push back gently on the cheap Chinese route, especially with EV charging in the mix. That's a proper duty cycle you're looking at, not occasional use.

The thing is, you'll likely save a grand upfront but spend it twice over on replacements and lost productivity when things go wrong — and they do. @DodgySocket and @AndyButler have got the right experience there.

Here's what I'd suggest instead: look at refurbished or ex-display Victron kit, or step up to a decent Growatt (not the bottom-tier ones). The mid-range stuff actually holds up reasonably well if you get the right model. Alternatively, could you split the load? Keep your existing Victron as-is and add a smaller dedicated inverter just for the EV circuit? Often works out cheaper than one large unit, and gives you redundancy.

What's your actual budget looking like? And is the EV charging constant or occasional? That'll make a real difference to what makes sense.

The EV charging element changes the calculus here. That's sustained, high-current draw — not like running a kettle for 10 minutes. Cheap inverters struggle with that duty cycle, and you'll see voltage sag that'll either slow your charging to a crawl or trigger protection shutdowns.

I run a Victron 5000 on the narrowboat specifically because it handles the odd high-load spike without drama. Yeah, it cost more upfront, but I've never had to troubleshoot it at 11pm in the dark, which has value.

If you're genuinely budget-constrained, consider:

• Second-hand Victron (they hold up brilliantly)
• Growatt or Sunsynk rather than the bottom-tier brands — better firmware, proper UK support
• Splitting the load across a smaller second inverter for the EV circuit

What's your actual budget and battery bank size? That'll determine whether you genuinely need 5kW or if you can get away with staggered charging.

Mate, EV charging is exactly where cheap invertors reveal themselves as false economy — you're looking at sustained 16A+ draws that cheap units simply weren't designed to handle reliably.

The Victron you've got will outlast most vehicles; sticking with that philosophy now pays dividends. If budget's tight, look at a second quality unit (Growatt, Deye) rather than one big dodgy one. Redundancy's your mate anyway when you're running critical loads.

Chinese gear isn't inherently rubbish, but the QC on inverters is genuinely hit-and-miss below the Growatt/Deye tier. You'll find yourself chasing phantom faults instead of enjoying the setup.

What capacity are you actually targeting? Might be there's a clever staging solution that keeps costs down without the Russian roulette aspect.

Had this exact dilemma last year when I added EV charging to my van setup. Started eyeing the budget Chinese units and nearly pulled the trigger until I ran the numbers properly.

The thing with EV charging is it's not a spike — it's a sustained load that'll expose every efficiency weakness. You'll get heat buildup, voltage sag, and those cheap units tend to throttle themselves back. Watched a mate's Growatt clone tank down to 80% capacity within 18 months doing exactly this.

Where I'd actually compromise: grab a decent mid-range unit (Fogstar or Renogy's better stuff) and pair it with quality cabling and a proper DC breaker setup. The inverter itself becomes maybe 40% of the cost when you factor in installation and protection. That's where the cheap units bite you — no one mentions the auxiliary gear you'll need anyway.

Your existing Victron can run loads under 3kW whilst the new unit handles charging. Stagger it if you're not grid-tied. That gives you redundancy too, which frankly matters more than saving £300 upfront.

The lads above have nailed the core issue—EV charging exposes every weakness a cheap inverter's got. Sustained 16A at 230V means you're pushing 3.6kW continuously, and that's where the no-name units start thermal throttling or just shutting down.

I'm running dual Victron 3000VA units in parallel on my narrowboat setup, and honestly, once you factor in efficiency losses on budget gear, you're not saving as much as the initial price suggests. A cheap 5kW unit pulling 85-88% efficiency versus Victron at 92-94% means you're burning more battery capacity to deliver the same power—that compounds quick.

If you're serious about EV charging, you're realistically looking at a proper 5kW+ unit. Victron's pricier but holds resale value and won't leave you troubleshooting at 2am in January. Renogy's middle-ground stuff has decent reviews on the forum, though I've not run it myself.

What's your actual battery capacity? That determines whether you can even sustain 3.6kW

EV charging is basically an inverter stress test masquerading as a feature request. Those budget units'll handle it fine for about 47 seconds before thermal throttling becomes your new hobby.

You've already got a Victron 3000 — honestly, stack a second one in parallel rather than swap down. Dual 3000s gives you proper redundancy, better cooling, and you'll keep the 5000W+ you actually need for simultaneous loads without watching your battery voltage collapse in real time.

If you're dead set on single unit, look at Victron's 5000VA or the Fogstar equivalents — yeah, pricier, but you won't be stress-testing it constantly. Cheap Chinese kit loves to develop personality quirks under sustained load, especially with reactive loads like EV chargers.

What's your battery bank capacity and solar array size? That'll determine whether you're actually inverter-limited or just overthinking it.

Genuinely curious about something the others haven't quite addressed — when you say you're adding EV charging, are you talking about a dedicated circuit or pulling from the same battery bank? That matters hugely with Chinese units.

I've got a Fogstar 5000W in my shepherd's hut and it's been solid for basic loads, but the moment I tried running sustained high-draw stuff (water heater + microwave), the voltage sag was noticeable. With EV charging you're looking at hours of steady draw, not short peaks.

The issue isn't really whether budget inverters can handle it — they technically will. It's whether they'll do it safely long-term. Most cheap Chinese units don't have the same thermal management or component quality as your Victron, so you're gambling on lifespan.

What's your battery capacity and what amperage are you planning to pull for the EV? If it's modest (under 16A continuous), a decent Chinese unit might work. But if you're serious about this being reliable, honestly the Victron upgrade path or a second dedicated inverter for the EV circuit might be cheaper than replacing

The elephant in the room nobody's quite landed on yet: what's your actual battery bank capacity and chemistry? That's what'll make or break a cheap inverter on EV charging, not the inverter itself.

I learned this the hard way in my motorhome setup. Threw a Renogy 3kW at a LiFePO4 bank thinking job done—turns out sustained 16A draws expose voltage sag issues that cheap units handle atrociously. Your Victron's probably got bulletproof BMS integration; most Chinese units just see volts, not cell state.

The real question is whether you want a proper hybrid (charger built in) or pure inverter. If you're adding EV charging infrastructure, you'll want a unit that plays nicely with your battery management, not one that'll trip protection circuits every time you pull 40A.

Budget option that actually works? Upgrade your battery bank first, run the existing Victron harder. Those 3000VA units are tanks. A decent 200Ah LiFePO4 will handle your EV top-ups without needing the inverter to heroically sustain unbalanced loads.

What's your current battery specs?

The real question is whether you're actually adding 7kW of simultaneous demand or just hoping to charge an EV someday—massive difference on your battery bank, as @LiFePO4Nerd rightly points out.

Chinese inverters are fine for steady loads, but EV charging creates spiky demand that exposes cheap units' shabby power factor correction and firmware. You'll get away with it until you won't, usually at 3am when your LiFePO4 pack is half-discharged and everything goes angry.

Stick with the Victron philosophy: buy once, cry once. A second 3kW Victron running parallel would be cleaner than gambling on a dodgy 6-8kW unit—splits the load, handles asymmetric draw, and you've already got the settings dialled in.

If budget's genuinely tight, a Fogstar 5kW is the middle ground—proper support, decent build quality, and actually available from UK distributors when things inevitably need warranty work.

What's your actual battery bank spec and typical winter morning voltage?