Inverter generator with pure sine wave 110V and 230V output, 8200W rated and an 18-hour economy runtime, for heavy site, event and workshop loads.
Products marked (TO ORDER) may not be available from stock for same-day or next-day delivery. Please contact our team to confirm delivery dates.
Inverter generator with pure sine wave 110V and 230V output, 8200W rated and an 18-hour economy runtime, for heavy site, event and workshop loads.
Products marked (TO ORDER) may not be available from stock for same-day or next-day delivery. Please contact our team to confirm delivery dates.
| BULK DISCOUNT | 3 | 5 |
|---|---|---|
| Price | £2,374.99 £2,849.99 | £2,256.24 £2,707.49 |
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Log in to access trade discountsThis inverter generator pairs a 459cc petrol engine with digital inverter electronics, giving a pure sine wave output from an enclosed, sound-reduced case. It delivers 8200W rated through 16A and 32A 230V sockets and a 32A 110V socket, all usable at the same time. Folding handles, a protective frame and two wheels let you move it into position on site.
Smaller generators often limit their 32A sockets with lower-rated circuit protectors, so one heavy tool can trip the supply. On site, that means juggling tools, waiting for loads to finish or bringing in a second generator. This model protects both 32A outlets at 32A and has 8200W rated output, so breakers, saws and lighting can run together within the rating.
8200W rated output: runs several heavy tools, lighting and equipment together, with 8800W for short start-up peaks.
32A protection on both 32A sockets: the 110V and 230V 32A outlets are protected at their full socket rating.
Pure sine wave output: THD under 3% suits laptops, controls, AV and catering equipment.
27L tank with fuel eco mode: gives up to 18 hours at 25% load between refills.
Data centre display: shows hours, voltage, load and frequency, with output, overload and low oil lights.
Push-button start with recoil backup: starts at the press of a button, with a pull-start if the battery is low.
Folding handles and wheels: move a 96kg generator on its wheels instead of lifting it.
Trades and roles
Site managers and groundworkers
Electricians and M&E contractors
Event production and catering teams
Workshop and plant maintenance teams
Facilities and emergency response teams
Industrial maintenance engineers
Industries
Construction
Events and hospitality
Industrial and manufacturing
Facilities management
Utilities
| Specification | Detail |
|---|---|
| Product name | SIP Medusa ISG8800 Digital Inverter Generator - 8.8kW 110V 230V |
| Product code | PL050005 |
| Product type | Silent enclosed petrol digital inverter generator, 110V and 230V |
| Maximum output | 8800W |
| Rated output | 8200W |
| Rated current (230V) | 35A running, 38A peak |
| Output waveform | Pure sine wave, THD under 3% |
| AC output | 230V and 110V (panel marked 115V), 50Hz, single phase |
| 230V sockets | 1x 16A blue (16A circuit protector), 1x 32A blue (32A circuit protector) |
| 110V socket | 1x 32A yellow (32A circuit protector) |
| Socket type | EN 60309 industrial sockets, IP44, hinged covers |
| Simultaneous use | All three outlets together, within the 8200W rated output |
| Engine | 459cc 4-stroke petrol, 3400rpm |
| Emissions | EURO V |
| Start | Push-button electric start, manual recoil backup |
| Starter battery | 12V 5Ah lead-acid, fitted but disconnected, charged while the generator runs |
| Fuel tank capacity | 27L |
| Runtime (eco mode) | 18 hours at 25% load, 7.5 hours at 75% load |
| Economy mode | Fuel eco (low idle) mode, for loads under 75% of rated output |
| Engine oil capacity | 1.2L, SAE 10W-30, supplied without oil |
| Fuel | Fresh forecourt E5 or E10 unleaded petrol |
| Engine protection | Low oil warning on the display, stops the engine and prevents restarting until topped up; overload protection |
| Cooling | Forced air |
| Display | Data centre display: hours, voltage, load, frequency; output, overload and low oil indicator lights |
| Controls | Power switch, start/stop button, fuel switch (on, off, storage), fuel eco switch, circuit protectors, earth terminal |
| Earthing | Earth terminal, connect with at least 4mm2 stranded copper wire to an earth rod driven at least 1.2m into the ground (not supplied) |
| Operating conditions | Outdoors, dry level surface, not in rain or damp; 1m clearance, 2m from conductive surfaces |
| Sound pressure level | 63dB(A) at 7m, 25% load |
| Sound power level | 97dB(A) LwA guaranteed (97dB(A) measured) |
| Markings | UKCA (UK Declaration of Conformity), CE (EU Declaration of Conformity) |
| Standards | BS EN ISO 3744:1995, BS EN ISO 8528-13:2016, BS EN 55012:2007+A1:2009, BS EN IEC 61000-6-1:2019 |
| Mobility | Two wheels, two folding transport handles, protective frame |
| Dimensions (H x W x D) | 755mm x 640mm x 665mm |
| Weight | 96kg net, 108.2kg gross |
| Warranty | SIP 2-year |
| Brand | SIP (Medusa range) |
| Equipment, tool or condition | Suitability |
|---|---|
| 110V site tools with yellow 32A plugs | Suitable, through the 110V outlet |
| 110V site tools with yellow 16A plugs | Suitable with a 32A to 16A fly lead or splitter box |
| 230V equipment with blue 16A or 32A plugs | Suitable, through the matching 230V outlet |
| 230V equipment with UK 3-pin 13A plugs | Suitable with a 16A to 13A adaptor lead, within the load limit |
| Laptops, controls, AV and catering equipment | Suitable, pure sine wave output with THD under 3% |
| 110V and 230V loads at the same time | Suitable, within the 8200W rated output |
| Several heavy tools running together | Suitable, within 8200W, with heavy loads spread across the outlets |
| Noise-sensitive sites such as housing, schools, hospitals and events | Suitable, 63dB(A) at 7m on a 25% load, check any site noise limits |
| Lifting by one person | Not recommended, it weighs 96kg, wheel it or use two people or a lifting aid |
| Rain and wet weather | Not recommended, the manual says not to use it in rain or damp conditions |
| Loads above 8200W continuous | Not recommended, choose a diesel generator |
| Indoor, enclosed or poorly ventilated spaces | Not recommended, exhaust gases contain carbon monoxide, run outdoors only |
| Connecting into building wiring | Not recommended, unless installed by a qualified electrician with a changeover switch |
Site managers, event teams and maintenance engineers use this generator where several heavy loads need clean power at once. It suits busy sites, event infrastructure, workshop standby and temporary industrial power. Operators should understand load limits, socket ratings, manual handling and safe refuelling.
Running 110V breakers, saws and lighting together on construction sites without a temporary supply.
Powering inverter welders and grinders for steelwork and fabrication away from mains.
Supplying stage lighting, AV and PA systems, refrigeration and mobile catering at events.
Providing workshop standby for compressors, extraction systems and diagnostic equipment.
Running control panels and small machines as temporary industrial power.
Powering shelters, communications and heating during emergencies and off-grid work.
Step 1: Wheel the generator outdoors onto a dry, level surface, with 1m clear on all sides and well away from doors, windows and air vents.
Step 2: With the engine off and cool, check the engine oil level and fill the tank with unleaded petrol.
Step 3: Follow the earthing instructions in the manual before connecting any equipment.
Step 4: With nothing plugged in, turn the fuel switch on, set the power switch to ON and press the start/stop button. Use the recoil starter if the battery is low.
Step 5: Set fuel eco on for light loads, or off for heavy and start-up loads.
Step 6: Let the generator run for a few minutes, then plug in the largest load first and add the others one at a time. Spread heavy loads across the outlets and keep the total within 8200W.
Step 7: Watch the data centre display for overload warnings while working. To stop, switch off and unplug all equipment, run without load for a few minutes, press the start/stop button, then turn the fuel switch and power switch off.
Putting every heavy tool on one socket instead of spreading the load.
Leaving fuel eco on when starting motors or other heavy loads, which then struggle to start.
Lifting the generator without enough people or a lifting aid.
Running the generator in a marquee, van or other enclosed space.
Plugging in or switching on several devices at the same time instead of one by one.
Exhaust gases contain carbon monoxide, so run the generator outdoors only and keep it away from openings into buildings and marquees. Switch off and let the engine cool before refuelling, and store petrol in approved fuel cans. HSE guidance favours 110V centre-tapped earth supplies for portable tools on construction sites, so check the manual and your site rules before relying on the 110V output. At 96kg, plan any lifting under the Manual Handling Operations Regulations, using two people or a lifting aid. Wear hearing protection when working close to the generator for long periods.
Check the oil level before each use or every 8 hours, and change it every 25 hours. Check and clean the air filter every 3 months or 50 hours, and the spark plug and spark arrestor every 6 months or 100 hours, more often in dusty conditions. Use the hour reading on the display to plan services. Run the generator for at least 20 minutes a month to keep the battery charged. Before storage, drain the fuel tank and carburettor, and disconnect the battery if it will stand for more than 30 days.
Q: Can I run 110V and 230V equipment at the same time?
A: The supplier states all three sockets can be used together, as long as the total stays within the 8200W rated output. The 16A 230V socket has a 16A circuit protector, and both 32A sockets have 32A circuit protectors. Spread heavy loads across the outlets rather than putting them all on one.
Q: What do 8800W and 8200W mean on an inverter generator?
A: 8800W is the maximum output, which the generator can only hold for short periods, such as while a motor starts. 8200W is the rated output it can supply continuously. Size your loads against the 8200W figure. The “ISG8800” model name matches the maximum output.
Q: How much can I run from the 110V socket?
A: The yellow 110V socket and its circuit protector are both rated at 32A. At 110V, 32A sets the limit for that socket, which is lower than the generator’s full 8200W. Put the rest of the load on the 230V sockets, or check the 110V figure in the manual for large 110V setups.
Q: What is this generator not suitable for?
A: It is not suitable for indoor or enclosed use, or for loads above 8200W continuous. Do not run it in heavy rain without a ventilated shelter. It should not be connected into building wiring unless a qualified electrician fits a changeover switch.
Q: Why choose this over the 5800W inverter generator?
A: It gives 8200W rated against 5500W, and both 32A sockets are protected at 32A rather than 24A. The 27L tank gives up to 18 hours at 25% load, against 14 hours. The 5800W model is lighter at 58.5kg, against 96kg, so it suits jobs where the generator moves often.
Q: Which plugs and leads fit the sockets?
A: There is a 16A blue 230V socket, a 32A blue 230V socket and a 32A yellow 110V socket. Most 110V hand tools have 16A plugs, so use a 32A to 16A fly lead or a splitter box. UK 3-pin plugs need a 16A to 13A adaptor lead on the 16A blue socket.
Q: What does the data centre display show?
A: It shows running hours, output voltage, load and frequency. Indicator lights warn of output, overload and low oil. The hour reading helps you plan oil changes and services at the right intervals.
