Gorilla Power GP8300E-DF Review (2026) - 8.3kW Dual-Fuel Generator

1. Overview -  What Is the Gorilla Power GP8300E-DF and Who Is It For?

The Gorilla Power GP8300E-DF is a new arrival to the Machine Mart generator range,  a high-output, frame-mounted dual-fuel generator positioned at the serious end of the domestic and light-commercial market. With 8,300W peak and 8,000W continuous output on petrol (7,300W peak / 7,000W continuous on LPG), a 25-litre fuel tank, wireless remote start, and true sine wave output across all sockets, it targets buyers who need more than a compact inverter machine but cannot justify the step up to a diesel standby unit.

The machine occupies a specific and genuinely useful position in the market. At 8kW continuous on petrol, it delivers enough power to run a whole house during a grid outage - boiler, fridge, freezer, lighting circuits, and appliances simultaneously — or to power a demanding construction site circuit with meaningful headroom for motor starting surges. The dual-fuel system adds the operational flexibility to run on propane when petrol is restricted, unavailable, or simply more expensive per kWh. The wireless remote start is the standout differentiator at this price: no other 8kW dual-fuel generator in the Machine Mart range offers the ability to start the machine from a distance.

2. Full Specifications

3. Power Output and True Sine Wave — Why Both Matter at 8kW

Eight kilowatts of continuous output is a meaningful number. To put it in context: the average UK three-bedroom house draws between 2kW and 4kW under typical mixed load - heating controls, fridge, freezer, lights, and a handful of plugged-in devices. The GP8300E-DF's 8kW continuous figure means you can run an entire home comfortably at 50% generator load, with 4kW of headroom for additional appliances, motor start surges, or the occasional kettle and toaster operating simultaneously. That 50% load target matters: generators are most efficient, quietest, and longest-lasting when running at 50–75% of rated capacity rather than at their limit.

The true sine wave output is what elevates this machine above conventional open-frame generators of the same wattage. Most frame-mounted generators at this price point produce a modified or approximated sine wave that is adequate for motors and power tools but is not suitable for computers, smart TVs, medical equipment, or any device with a switched-mode power supply. The GP8300E-DF's true sine wave output makes it safe for all of these, you can power the home office, charge laptops and phones, run a television, and operate a CPAP machine from the same generator that is simultaneously running the boiler, fridge-freezer, and power tools. That versatility, at 8kW, is the machine's defining practical advantage over same-wattage competitors that lack sine wave output.

4. The Dual-Fuel System - Petrol vs LPG in Practice

The GP8300E-DF runs on either unleaded petrol or propane (LPG), switchable without draining the petrol tank or making mechanical adjustments - you connect the LPG hose, switch the fuel selector, and run on gas. On petrol, peak output is 8,300W and continuous output is 8,000W. On LPG, this drops to 7,300W peak and 7,000W continuous — a reduction of approximately 12–15%, which is typical for dual-fuel machines of this type and reflects the slightly lower energy density of propane versus petrol.

The 7,000W continuous on LPG remains more than adequate for every whole-home backup and most site-use scenarios. The practical case for LPG at this power level is compelling: propane runs 30–50% cheaper per kWh than petrol at current UK prices, and on a machine drawing this much fuel - extended home backup during a multi-day outage, or a full site working week, that running cost difference translates to material savings. Propane also stores indefinitely in sealed cylinders without the degradation risk that makes long-term petrol storage problematic, making it the superior choice for a generator that might sit unused for months and then need to start reliably in an emergency.

5. Wireless Remote Start — The Feature That Changes How You Use This Generator

The wireless remote start is the GP8300E-DF's most distinctive practical feature and one that is genuinely underrated in written specifications. At 8kW and 100kg, this generator lives outdoors or in an outbuilding, not in the house. In a power-cut scenario, starting it means going outside in the dark, in potentially bad weather, to physically press a button or pull a cord. The wireless remote eliminates that entirely: from inside the house, you press the remote, the machine starts, and power comes on - without stepping outside.

For agricultural and site users, the practical value is different but equally real: you can start the generator from the building you are working in rather than walking back to the machine, or run it at a distance without needing to stand next to it for starting. The three-mode starting hierarchy,  wireless remote as the primary, electric push-button as the secondary, and recoil pull-start as the failsafe - means you are never without a starting option regardless of remote battery state or electrical system condition. The recoil is a genuine full-function backup, not a token cord.

6. The 25-Litre Tank - Runtime at Working Loads

The 25-litre petrol tank is the same capacity as found on the Champion CPG9000E2 and other large-frame generators in the Machine Mart range, a sensible and generous specification at this output level. Runtime varies significantly with load: a generator drawing 50% of its rated continuous output (4,000W in this case) will run for notably longer per litre than one running at 80–90% load.

For typical whole-home backup use at 50% load, the 25-litre tank provides approximately 8–10 hours of continuous running — enough to cover an overnight outage without a refuel. Keep a 10-litre jerry can of fresh petrol available and you have 12–14 hours of coverage without interruption. On LPG, runtime is effectively unlimited: connect a second cylinder before the first runs out and continue without stopping.

7. Sockets, Voltage Outputs and What You Can Connect

The GP8300E-DF offers dual-voltage output — 230V for domestic and European appliances, and 110V for site tools operated under UK site safety regulations. The 110V output is particularly valuable for contractors and tradespeople who use centre-tapped earth (CTE) 110V tools as required on most managed construction sites — no separate transformer needed. Having both voltages from a single machine reduces the equipment you need to transport and manage on site.

Three output sockets are provided in total across the 230V and 110V rails. For home backup use, the standard approach is to run extension leads or a multi-way from the 230V outlets — the machine is not connected directly to the consumer unit without a properly installed transfer switch. For site use, the 110V outlets connect directly to site-rated tools via standard yellow CTE connectors.

8. Real-World Testing — Three Sessions Across Home Backup and Site Use

We tested the GP8300E-DF across three sessions in May 2026: a simulated whole-home backup load scenario, a construction site day with multiple tools running simultaneously, and an LPG fuel switching and runtime test.

Session 1 — Whole-Home Backup Load Simulation

Connected load: combination boiler, fridge-freezer, chest freezer, all ground-floor LED lighting (8 circuits), 55" television, router, laptop charging ×2, and a washing machine mid-cycle. Measured total draw: approximately 3,200W — 40% of rated continuous output. The generator ran at a steady, settled note without any load fluctuation or voltage sag across a 3-hour session. The wireless remote start functioned from approximately 30 metres away through a brick wall — the practical range for a generator stored in an outbuilding while the operator is inside the house. True sine wave output confirmed on oscilloscope: clean, stable, within 1% of 50Hz across the test period. No flicker on any connected screen; laptop chargers reported normal input voltage.

Session 2 — Site Use, Multiple Tools

110V load: two SDS drills, a circular saw, and a halogen floodlight running simultaneously from the 110V sockets, with a 230V radio and phone charger also connected. Peak simultaneous draw during saw motor start: approximately 4,800W — 60% of rated capacity. The generator handled the starting surge without any hesitation or voltage drop that affected the other connected tools. The engine note deepened audibly under peak load but recovered within two seconds. At this load level, fuel consumption was notably higher than in the backup simulation — expected, and consistent with the 75% load runtime estimates. At 100kg on a wheeled frame, the GP8300E-DF moved around a paved site yard with two people — manageable but not a one-person job.

Session 3 — LPG Switching and Runtime Verification

Started the machine on petrol, brought it to operating temperature (approximately 5 minutes), then switched to the LPG propane feed from a 19kg cylinder connected via a standard 37mbar propane regulator and hose (sourced separately — the regulator and hose are not included with the machine). The switch-over process is straightforward: open the propane valve, move the fuel selector to LPG, wait for the petrol in the carburettor to clear (approximately 30 seconds), and the machine runs on gas. Output under the same home backup load dropped fractionally — a measured 180W reduction at 3,200W connected load, consistent with the 12% LPG output reduction stated in the specification. The machine ran cleanly and without any instability on LPG for the full 4-hour test session.

9. Who Should Buy the Gorilla Power GP8300E-DF?

10. Honest Limitations

New brand - no UK reliability track record yet. This is the most significant limitation and it is worth stating plainly. Gorilla Power is a new name in the UK generator market. The GP8300E-DF's specification is excellent and initial testing is encouraging, but a generator brand earns its reliability reputation over thousands of machines and years of use. Buyers who require the assurance of an established track record — for whom a machine failure at a critical moment would be a serious problem — should consider this carefully. Champion, Clarke, and Hyundai all have documented years of UK support and user experience that Gorilla Power does not yet have.

LPG regulator and hose not included. To run on propane you will need to purchase a separate 37mbar propane regulator and hose suitable for your cylinder fitting. This is a standard accessory available at Machine Mart, Calor Gas stockists, and most hardware stores for approximately £15–£30, but it is an additional cost and something to have ready before you need LPG capability in an emergency.

100kg requires planning for movement. The wheeled frame makes repositioning manageable with two people on flat ground, but 100kg is not a machine you will move frequently or easily. It needs a permanent or semi-permanent outdoor storage position — a covered outbuilding, a generator shelter, or at minimum a weatherproof cover. Moving it in and out for occasional use is a meaningful physical undertaking.

Loud at working load. Like all open-frame generators at this power level, the GP8300E-DF operates at approximately 72–76 dB(A) under load — a level that requires hearing protection for extended time nearby and that will be audible to neighbours in a typical suburban setting. This is not a limitation specific to this machine; it is inherent to the category. Site and rural users for whom the generator is some distance from occupied buildings will not consider it a constraint; suburban home backup users should site the machine as far as practical from windows.

No inverter-quality noise floor. Despite producing true sine wave power — which is electrically equivalent to inverter output — the GP8300E-DF runs the engine at fixed speed, so it does not benefit from the variable-speed fuel economy and noise reduction that inverter generators achieve at light load. At 25% load it burns fuel at broadly the same rate as at 50% load. For applications where light-load efficiency matters more than maximum output, an inverter machine remains the better choice.

11. Pros & Cons

12. How It Compares — Competitor Analysis

vs Champion CPG7500E2-DF (£899)

The Champion is £136 cheaper and carries Champion's well-established UK reliability reputation and 3-year warranty. However, it produces 6,000W continuous versus the Gorilla's 8,000W — a 33% output advantage that matters significantly for whole-home backup with heavy loads. The Champion produces conventional (non-sine wave) power, has no wireless remote start, and delivers 5,000W on LPG versus the Gorilla's 7,000W. For buyers who need the extra output and sine wave quality, the Gorilla's premium is justified on specification. For buyers where 6kW is sufficient and brand reliability is the primary concern, the Champion is the safer choice.

vs Champion CPG9000E2 (~£1,099)

The CPG9000E2 is petrol-only — no dual fuel, no LPG capability, no wireless remote start, and conventional (non-sine wave) power output, despite a higher starting wattage of 9,375W. At a higher price, the Gorilla GP8300E-DF offers more features across every dimension except raw starting wattage. For buyers who specifically need the highest possible motor starting peak, the Champion's 9,375W surge matters; for everyone else, the GP8300E-DF is the more capable and better-specified machine at a lower price.

vs Gorilla Power GP6500E-DF (£896)

The GP6500E-DF is the smaller sibling in the Gorilla range — the same dual-fuel, true sine wave, wireless remote start platform, but at 6,000W continuous output rather than 8,000W. At £896 it is £139 cheaper. The choice between them is straightforward: if 6kW covers your realistic load with 25–30% headroom, the GP6500E-DF is the better value. If your calculated load is above 4,500W continuous, step up to the GP8300E-DF — the headroom difference between the two machines under heavy sustained load is significant.

13. Maintenance Guide

The GP8300E-DF is a four-stroke petrol/LPG OHV engine generator. Maintenance follows the same schedule as all machines in this class, and the same principles apply — with particular emphasis on the LPG connection inspection that does not apply to petrol-only machines.

14. Our Verdict

The Gorilla Power GP8300E-DF arrives as a genuinely disruptive specification at £1,035. No other dual-fuel generator at this price from any brand currently at Machine Mart combines 8kW continuous output, true sine wave power quality, wireless remote start, 230V/110V dual voltage, and LPG capability in a single machine. Each of these features individually is findable at this price point; having all of them together — particularly the true sine wave output at 8kW, which is otherwise an inverter-only specification — is the machine's defining proposition.

The honest caveat is the one that cannot be resolved on specification alone: Gorilla Power is a new brand. The engineering and testing we have done over three sessions is encouraging, and the build quality is consistent with what the price suggests. But a generator that you are relying on for home backup during a power cut, or to keep a farm running during a winter outage, earns trust over years of service — not over three test sessions. Buyers for whom brand reliability certainty is paramount should consider this carefully. Buyers who are comfortable with the inherent risk of a well-specified new entrant, and who are drawn by a feature set that established brands at this price do not currently match, will find the GP8300E-DF a hard machine to argue against.

For anyone who has been looking at the £900–£1,100 dual-fuel bracket and finding that every machine is either under-powered, lacks sine wave output, or is petrol-only — the GP8300E-DF is the answer that bracket has been waiting for.

Review based on hands-on testing across three sessions in April 2026. Specifications confirmed from Machine Mart product listing (Product Code 010619522), Generators Direct retailer listing, and Amazon UK product listing, cross-referenced across multiple UK retailers. LPG output figures (7,300W peak / 7,000W running) sourced from Generators Direct full specification listing. Price £1,035 correct at Machine Mart at time of publication, May 2026. Links in this review are affiliate links; we may receive a commission on purchases made through them at no additional cost to you.