Powerful fuel efficient petrol inverter generator

Gorilla Power 3500W Inverter Suitcase Generator - GP3500i - Powerful & Fuel Efficient

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Gorilla Power 3500W Inverter Suitcase Generator - GP3500i - Powerful & Fuel Efficient £499.00

The Gorilla Power GP3500i Inverter Generator delivers the perfect balance of portability and power, making it ideal for home backup, camping, caravanning, mobile businesses and professional trade use. Producing 3500W maximum output and 3000W continuous running power, the GP3500i provides ample headroom for larger appliances, power tools and sensitive electronics.

  • 3500W maximum inverter output
  • 3000W continuous running power
  • True sine wave power quality
  • 21.5kg suitcase style design
  • Manual recoil start petrol engine
  • 6 litre fuel tank
  • Runs up to 14 hours in Economy Mode
  • Parallel ready for extra power
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Full Description

The Gorilla Power GP3500i Inverter Generator delivers the perfect balance of portability and power, making it ideal for home backup, camping, caravanning, mobile businesses and professional trade use. Producing 3500W maximum output and 3000W continuous running power, the GP3500i provides ample headroom for larger appliances, power tools and sensitive electronics.

Featuring advanced True Sine Wave Inverter Technology, the GP3500i generates clean, stable electricity that is safe for laptops, televisions, routers, battery chargers and modern electronic equipment. The efficient petrol engine and 6-litre fuel tank provide up to 14 hours runtime at 25% load, while the compact suitcase-style design makes transportation simple.

With low operating noise of approximately 63dB at 7 metres, Economy Mode, low oil protection and parallel capability, the GP3500i is one of the most versatile inverter generators in the Gorilla Power range.

Key Features

  • 3500W maximum output power
  • 3000W continuous running power
  • True sine wave inverter technology
  • Safe for sensitive electronics
  • Up to 14 hours runtime
  • Economy Mode for improved fuel efficiency
  • Parallel-ready for increased output
  • Low oil shutdown protection
  • Quiet operation at approximately 63dB
  • USB charging outputs
  • 12V auxiliary output
  • Compact suitcase-style design
  • Ideal for home backup and mobile power applications

Technical Specifications

Specification Details
Maximum Output 3500W
Running Output 3000W
Fuel Type Petrol
Starting System Manual Recoil
Fuel Tank Capacity 6 Litres
Oil Capacity 0.6 Litres
Runtime Up to 14 Hours @ 25% Load
Frequency 50Hz
Noise Level Approx. 63dB @ 7m
Weight 21.5kg
Parallel Ready Yes
Inverter Type True Sine Wave

Power Output Guide

The GP3500i offers increased output capacity over smaller inverter generators, making it suitable for a wider range of appliances, power tools and backup power applications.

Equipment Typical Running Power Typical Starting Power GP3500i Suitability
Laptop & Phone Charging 100-200W Approx. Same Suitable
LED TV, Router & Lighting 150-250W Approx. Same Suitable
Fridge Freezer 120-200W 800-1200W Suitable
String Trimmer 300-350W 700-875W Suitable
Hedge Trimmer 400-450W 900-1200W Suitable
Drill 500-600W 800-900W Suitable
Hand Sander 500-600W 900-1200W Suitable
Paint Sprayer 500-600W Approx. 600W Suitable
Work Light 300-1000W Approx. Same Check Total Load
Sump Pump (1/2 HP) 700-800W 1200-1300W Suitable
Microwave 800-1200W Approx. Same Suitable
Small Fan Heater 1000-1500W Approx. Same Suitable
Small Electric Pressure Washer 1000-1200W 1800-2400W Usually Suitable
Circular Saw (7¼") 1200-1800W 1800-2400W Usually Suitable
Small Air Compressor 1400-1600W 3500-4500W Check Starting Load
Electric Water Heater 3000-4000W Approx. Same Not Suitable

Guide Only: Add together the running watts of all devices being used simultaneously and ensure the highest starting surge remains within the generator's maximum output capacity.

Sockets & Connections

  • 2 x 240V UK 3-Pin AC Sockets
  • USB Charging Outputs
  • 12V DC Auxiliary Output (5A)
  • Dedicated 5V Auxiliary Output
  • Parallel Connection Ports
  • Grounding Terminal
  • Status Indicator Lights

Why Choose the GP3500i?

The GP3500i sits perfectly between compact inverter generators and larger site generators. It offers significantly more power than entry-level inverter models while remaining lightweight, portable and fuel-efficient.

Its combination of long runtime, clean power output and low noise levels makes it a superb choice for homeowners, campers, mobile businesses and tradespeople requiring dependable portable power.

Ideal Applications

  • Home emergency backup power
  • Camping and caravanning
  • Mobile detailing and valeting businesses
  • Food vans and catering units
  • Construction and trade work
  • Garden and landscaping equipment
  • Outdoor events and festivals
  • Remote working locations
  • Workshop and garage use

HQ Suggests (Tips & Insights)

  • 💡 The GP3500i is an excellent choice for users wanting more power than a 2kW inverter generator without stepping into larger heavy-duty units.
  • 💡 Ideal for running fridges, lighting, routers and essential appliances during power outages.
  • 💡 True sine wave technology makes it safe for sensitive electronics and modern appliances.
  • 💡 Economy Mode can significantly increase fuel efficiency during lighter load operation.
  • 💡 Parallel capability allows future expansion if your power requirements increase.

Why Buy From The Drivers HQ?

The Gorilla Power GP3500i is available from our Derbyshire showroom, where our team can help you choose the right generator for home backup, business, camping or trade use. We offer expert advice, competitive pricing and fast UK-wide delivery across the complete Gorilla Power generator range.

Tracked UK delivery, or collect eligible orders from our Ilkeston store.

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Key features

  • 3500W Output
  • 21.5kg Weight
  • True Sine Wave
  • Manual Recoil Start
  • Parallel Ready

The Drivers HQ

Expert Notes

The GP3500i sits above the GP2000i in Gorilla Power's inverter range, with 3500W of maximum output and 3000W of continuous running power from a petrol engine with true sine wave output. At 21.5kg it keeps the suitcase style portability of the smaller model while giving more headroom for tools, appliances and sensitive electronics together. A 6 litre tank and 0.6 litre oil capacity support runtime of up to 14 hours in Economy Mode, and the manual recoil start keeps operation straightforward. It suits campers, tradespeople and anyone needing a step up in backup power, and pairs well with extension leads, fuel cans and basic maintenance tools rather than larger site equipment.

Perfect For / Suitable Surfaces

  • Home emergency backup power
  • Camping and caravanning trips
  • Mobile detailing and valeting businesses
  • Construction and trade work
  • Garden and landscaping equipment
  • Outdoor events and festivals
  • Workshop and garage use

Caution: Always add up the running and starting watts of everything you plan to connect at once, and run the generator outdoors, well away from windows, doors and vents.

Technical Specifications

Product Type
Petrol Inverter Generator
Brand
Gorilla Power
Maximum Output
3500W
Running Output
3000W
Fuel Type
Petrol
Fuel Tank Capacity
6L
Oil Capacity
0.6L
Starting System
Manual Recoil
Weight
21.5kg
Runtime
Up To 14 Hours At 25% Load
Noise Level
Approx. 63dB At 7m
Sockets
2 x 240V UK 3-Pin AC

How To Use

Using it

  1. Position the generator outdoors on a flat, stable surface.
  2. Check the oil level before starting the engine.
  3. Start the engine using the manual recoil start.
  4. Let the engine settle before connecting any load.
  5. Connect equipment to the 240V AC sockets, USB or 12V DC outputs as needed.
  6. Use Economy Mode to extend runtime on lighter loads.

Cleaning and storage

  1. Let the generator cool fully before you store it.
  2. Wipe down the casing and clear any debris from the vents.
  3. Run the tank low or drain fuel before long periods of storage.
  4. Check and top up the oil before storing if needed.
  5. Store upright in a dry, well ventilated space.

Top Tip: Add up the running watts of every appliance you plan to use together before connecting them to the GP3500i.

Performance Benefits

  • Delivers clean power for electronics
  • Runs up to 14 hours per tank
  • Operates quietly at around 63 decibels
  • Extends runtime in Economy Mode
  • Expands output when linked to a second unit
  • Provides backup power during outages

Frequently Asked Questions

What is the maximum output of the GP3500i?

The GP3500i produces 3500W of maximum output and 3000W of continuous running power, using true sine wave inverter technology that keeps the electricity safe for sensitive devices.

How much does it weigh?

The GP3500i weighs 21.5kg, in a suitcase style case for easier carrying.

What size fuel tank does it have?

It has a 6 litre fuel tank and a 0.6 litre oil capacity.

How long does it run on a tank?

In Economy Mode at 25% load, the GP3500i can run for up to 14 hours.

How do you start it?

The GP3500i uses a manual recoil pull start.

Can it be linked to another generator?

Yes, the GP3500i is parallel ready, so it can be connected to a second compatible Gorilla Power unit for more output.

What connections does it have?

It has two 240V UK 3-pin AC sockets, USB charging outputs and 12V DC auxiliary outputs.

HQ Suggests Tips & Insights

  1. Add up running and starting watts before you connect anything.
  2. Check the oil level before every use.
  3. Always run it outdoors, never indoors or with doors shut.
  4. Use Economy Mode to stretch the fuel tank further.
  5. Let the engine cool before refuelling.
  6. Keep it on a flat, level surface when running.
  7. Store fuel well away from any naked flame.
  8. UK-wide delivery is available from The Drivers HQ.

The Brand

Gorilla Power

The Gorilla Power range by KIAM is a heavy-duty equipment line developed for users who need strength, reliability, and sustained performance from their machinery. Positioned within the KIAM ecosystem as a trade and industrial offering, Gorilla Power equipment is designed for demanding environments such as professional valeting, workshops, construction, agriculture, and commercial cleaning. The focus is on robust construction, straightforward operation, and long-term serviceability rather than consumer-grade convenience features.

Shop all Gorilla Power
Gorilla Power Equipment Range: Washers, Generators & Water Pumps

Gorilla Power Equipment Range: Washers, Generators & Water Pumps

The KIAM Gorilla Power range extends beyond pressure washing into essential power and fluid-handling equipment. The lineup includes heavy-duty pressure washers, portable generators, and water pumps designed for professional and site use.
Gorilla Power pressure washers are built around high-output motors and durable pump assemblies, delivering consistent pressure and flow for prolonged working periods. The generator range provides dependable portable power for sites, mobile setups, and remote locations, while Gorilla Power water pumps are designed for effective water transfer, drainage, and supply tasks. Across the range, equipment is specified with durability, load tolerance, and practical functionality in mind.

Trade Reliability, UK Support & Ilkeston Availability

Trade Reliability, UK Support & Ilkeston Availability

Gorilla Power equipment is aimed at operators who depend on their machines day in, day out. As part of KIAM Power Products, the range benefits from UK-based supply, parts availability, and technical support, helping businesses minimise downtime and extend equipment lifespan. Replacement components and compatible accessories are readily available, making Gorilla Power a practical long-term investment for trade users. We stock selected KIAM Gorilla Power machines in our Ilkeston showroom and offer UK-wide delivery, giving professionals across the country access to robust pressure washers, generators, and water pumps backed by UK support.

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