JCB-IG3500E 3.4kW Inverter Generator Review

The JCB-IG3500E adds electric start and a 16A industrial socket to JCB's inverter range for £799. We look at whether the upgrade over the IG2000 is worth it.

Key takeaways

Electric start and a second, heavier-duty socket lift this above the entry-level IG2000 - the natural pick for caravans and motorhomes.
At 3,200W continuous, the JCB-IG3500E comfortably covers a caravan's fridge, lighting circuit, TV and charging simultaneously, with enough headroom for a microwave or kettle on its own.
JCB quotes 19.5 hours from the 5-litre tank at 10% load - about 0.26 litres/hour, or roughly 40p/hour at £1.55/litre.
Against the JCB-IG2000 , the extra £250 buys electric start and a second socket for only 4kg more weight - worthwhile for most caravan users.

Our Rating

JCB-IG3500E 3.4kW Inverter Generator Review

4.5/5

Mark Moore

September 15, 2026

Review · JCB Tools · 2026

JCB-IG3500E 3.4kW Inverter Generator Review

Electric start and a second, heavier-duty socket lift this above the entry-level IG2000 - the natural pick for caravans and motorhomes.

By Mark Moore, Power Tools Specialist 3.4kW · 22kg · £799

⚡ Quick Answer

The JCB-IG3500E delivers 3,400W max / 3,200W continuous pure sine wave power from a 149cc petrol engine, with electric start (plus recoil backup), a 13A and a 16A industrial socket, and a claimed 60 dB(A) at 25% load. At £799 and 22kg, it's the sweet spot for caravans, motorhomes and anyone who wants push-button starting without stepping up to the wheeled IG4200E.

Full Specifications

Max / continuous output	3,400W / 3,200W
Engine	149cc single-cylinder, 4-stroke OHV petrol
Start	Electric, lithium-ion battery, with recoil backup
Fuel tank	5 litres
Runtime	Up to 19.5 hours at 10% load
Noise	60 dB(A) at 25% load, 7m distance
Weight	22kg net
Sockets	1x 13A BS, 1x 16A industrial blue, 12V DC, USB & USB-C
Output type	Pure sine wave
Warranty	3 years
Price	£799

View JCB-IG3500E at JCB Tools →

Who It's For

At 3,200W continuous, the JCB-IG3500E comfortably covers a caravan's fridge, lighting circuit, TV and charging simultaneously, with enough headroom for a microwave or kettle on its own. The second 16A industrial socket is the practical upgrade over the JCB-IG2000 - it lets you run a heavier load (site lighting, a compressor, a larger battery charger) through a properly rated industrial plug rather than sharing everything through one domestic 13A socket.

Electric start matters more than the spec sheet suggests: a cold, wet campsite morning with a recoil-only generator is exactly when you'll wish you'd paid the extra £250. The lithium-ion starter battery with recoil backup means you're not stranded if the battery is flat, either.

✅ Pros

Electric start with recoil backup
Two sockets - 13A domestic plus 16A industrial
3,200W continuous covers most caravan set-ups
Only 4kg heavier than the base IG2000

❌ Cons

Same small 5L tank as the entry model despite higher consumption
No wheels - 22kg is carryable but not effortless
No 32A socket for heavier site tools (that's the IG4200E)

Running Costs

JCB quotes 19.5 hours from the 5-litre tank at 10% load - about 0.26 litres/hour, or roughly 40p/hour at £1.55/litre. JCB hasn't published a 50% load runtime figure for this model; expect noticeably higher consumption under a real caravan load than the light-load figure suggests.

⚠ Outdoor use only. Never run a petrol generator in a tent, awning, garage or any enclosed space - carbon monoxide is invisible and odourless. See HSE guidance.

How It Compares

Against the JCB-IG2000, the extra £250 buys electric start and a second socket for only 4kg more weight - worthwhile for most caravan users. Against the JCB-IG4200E, you're trading 800W of continuous output and wheels for £200 less. Outside the JCB range, Hyundai's HY3250SEi and HY3900Si sit in almost identical output territory - both, like JCB, are distributed by Genpower, so the comparison largely comes down to socket configuration and price on the day. See our full JCB Tools inverter generator buying guide for the whole range side by side.

Garden-Review Verdict

This is the model most caravan and motorhome buyers should actually look at first. The jump from the IG2000 is modest in weight and price but meaningful in usability - electric start alone justifies it for most people, and the second socket adds real flexibility.

Garden-Review Rating: ⭐⭐⭐⭐ 4.5/5

View JCB-IG3500E at JCB Tools →

Specifications sourced from jcb-tools.co.uk (September 2026). This review is research-based, drawing on manufacturer specifications and published data rather than independent bench testing - see our editorial methodology. Running cost estimates assume £1.55/litre unleaded; verify current prices. Mark Moore is Power Tools Specialist at Garden-Review.co.uk and has no commercial relationship with JCB Tools, JCB Ltd or Genpower Ltd beyond Garden-Review's Awin affiliate partnership.

Frequently Asked Questions: JCB-IG3500E 3.4kW Inverter Generator Review

Is the JCB-IG3500E powerful enough for a caravan?

Yes, for a single caravan hook-up running a fridge, lighting, TV and charging together, 3,200W continuous is comfortably sufficient. Running a kettle or microwave at the same time as everything else is where you'd hit the ceiling.

What's the difference between the 13A and 16A sockets?

The 13A BS socket is a standard UK domestic three-pin outlet. The 16A industrial blue socket is a heavier-duty connector commonly used for site equipment and caravan hook-up leads, rated for a higher sustained current.

Does the JCB-IG3500E have wheels?

No. At 22kg it's designed to be carried by its handle. Wheels are fitted as standard from the next model up, the JCB-IG4200E.