Inverter generator with pure sine wave 110V and 230V output from three outlets, for site tools, sensitive electronics and events away from mains.
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 from three outlets, for site tools, sensitive electronics and events away from mains.
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 | £1,424.99 £1,709.99 | £1,353.74 £1,624.49 |
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Log in to access trade discountsThis inverter generator uses a 322cc petrol engine and digital inverter electronics to produce a pure sine wave output, inside an enclosed, sound-reduced case. Three industrial sockets supply 110V and 230V at the same time, so site tools and sensitive electronics can run from one unit. Two wheels and a retractable trolley handle move it around site.
A standard frame generator produces a rougher waveform that can upset laptops, chargers, controls and audio equipment. On site, that shows up as tripping chargers, flickering displays and kit that will not run properly on generator power. This inverter generator delivers a pure sine wave with total harmonic distortion under 3%, giving sensitive equipment the clean supply it needs.
Pure sine wave output: THD under 3% gives laptops, chargers and electronic controls a clean, stable supply.
110V and 230V together: 16A and 32A blue 230V sockets and a 32A yellow 110V socket all work at the same time.
Enclosed, sound-reduced case: runs at 64dB(A) at 7m on a 25% load, for events, housing and noise-sensitive sites.
Push-button start with recoil backup: starts at the press of a button, with a pull-start if the battery is low.
Low idle economy mode: drops engine speed at light loads, giving up to 14 hours at 25% load from the 13.5L tank.
Wheels and trolley handle: one person can wheel it across firm ground and position it where the power is needed.
Digital display and circuit protectors: monitor the output and protect each socket from overload.
Trades and roles
Site managers and builders
Electricians and M&E contractors
Event and hospitality teams
Farm and estate staff
Mobile workshop and service engineers
Facilities and emergency response teams
Industries
Construction
Events and hospitality
Agriculture
Facilities management
Utilities
| Specification | Detail |
|---|---|
| Product name | SIP Medusa ISG5800 Digital Inverter Generator - 5.8kW 110V 230V |
| Product code | PL050004 |
| Product type | Silent enclosed petrol digital inverter generator, 110V and 230V |
| Maximum output | 5800W |
| Rated output | 5500W |
| Rated current (230V) | 24A running, 25A peak |
| Power factor | 1.0 |
| 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 (24A circuit protector) |
| 110V socket | 1x 32A yellow (24A circuit protector) |
| Socket type | EN 60309 industrial sockets, 2P+E, IP44, hinged covers: 16A 220-250V blue, 32A 200-250V blue, 32A 110-130V yellow |
| Simultaneous use | All three outlets together, within the 5500W rated output |
| Engine | 322cc 4-stroke petrol, 3600rpm |
| 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 | 13.5L |
| Runtime (eco mode) | 14 hours at 25% load, 6.5 hours at 75% load |
| Economy mode | Low idle mode, for loads under 75% of rated output |
| Engine oil capacity | 0.7L, 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 |
| Controls | Digital display, power switch, start/stop button, fuel switch (on, off, storage), circuit protectors, earth terminal |
| Data centre display | Fuel level and low oil warning |
| 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 power level | 97dB(A) LwA guaranteed (95.2dB(A) measured) |
| Sound pressure level | 64dB(A) at 7m, 25% load |
| Performance class | G1 |
| Quality class | A |
| IP rating | IP23M |
| 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, retractable trolley handle, carry handles |
| Dimensions (H x W x D) | 540mm x 620mm x 470mm |
| Weight | 58.5kg net, 64.5kg 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 |
| 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, chargers and electronic equipment | Suitable, pure sine wave output with THD under 3% |
| 110V and 230V loads at the same time | Suitable, within the 5500W rated output |
| Noise-sensitive sites such as housing, schools, hospitals and events | Suitable, 64dB(A) at 7m on a 25% load, check any site noise limits |
| Rain and wet weather | Not recommended, the manual says not to use it in rain or damp conditions |
| Loads above 5500W continuous | Not recommended, choose a larger inverter or 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 |
Builders, event teams and facilities managers use this generator where clean power and low noise matter as much as output. It suits sites in residential areas, outdoor events and standby work, where 110V tools and 230V electronics need to run together. Operators should understand load limits, socket ratings and safe refuelling.
Running 110V site tools and a 230V site laptop or charging station at the same time.
Powering mobile catering, lighting, PA systems and card terminals at outdoor events.
Supplying pumps, pressure washers and fencing on farms and estates away from mains.
Powering heavier tools, battery chargers and compressors in mobile workshops.
Running 110V lighting and tools on construction sites in residential areas where noise is controlled.
Providing emergency power for communications, laptops and lighting during outages.
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 through the strainer.
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: Switch on low idle mode for light loads, or leave it off for heavy or 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. Keep each socket within its circuit protector rating and the total within 5500W.
Step 7: Switch off and unplug all equipment, run the generator without load for a few minutes, then press the start/stop button. Turn the fuel switch off, then the power switch.
Loading a 32A socket to its full rating, when its circuit protector is 24A.
Leaving low idle mode on when starting motors or other heavy loads, which then struggle to start.
Running the generator in a van, garage, marquee or other enclosed space.
Plugging 16A tools into a 32A socket without a fly lead.
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. 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. The IP23M rating covers spraying water only, so shelter the generator from heavy rain without blocking ventilation. The sound power level is 97dB(A), so wear hearing protection when working close to it 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. Run the generator for at least 20 minutes a month to keep the battery charged, and use the pull-start now and then to stop parts seizing. 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 5500W rated output. The 16A 230V socket has a 16A circuit protector. The 32A 230V and 32A 110V sockets each have a 24A circuit protector, so load them to 24A, not 32A. Spread heavy loads across the outlets rather than putting them all on one.
Q: What do 5800W and 5500W mean on an inverter generator?
A: 5800W is the maximum output, which the generator can only hold for short periods, such as while a motor starts. 5500W is the rated output it can supply continuously. The rating plate shows a power factor of 1.0, so the rated output is also 5.5kVA. The “ISG5800” model name matches the maximum output.
Q: What do IP23M and G1 mean on the rating plate?
A: In IP23M, the 2 means protection against solid objects over 12.5mm, such as fingers. The 3 means protection against water sprayed at up to 60 degrees from vertical. The M means the water test was carried out with the moving parts running. G1 is a generating set performance class for general loads such as lighting and simple electrical equipment.
Q: What is this generator not suitable for?
A: It is not suitable for indoor or enclosed use, or for loads above 5500W continuous. Do not run it in heavy rain, because IP23M covers spraying water only. It should not be connected into building wiring unless a qualified electrician fits a changeover switch.
Q: Why choose an inverter generator over an open frame petrol generator?
A: An inverter generator gives a pure sine wave output, which suits laptops, chargers and electronic controls. Its enclosed case runs much quieter, at 64dB(A) at 7m on a 25% load. Low idle mode saves fuel at light loads. An open frame generator suits heavy, rough site work where noise and waveform matter less.
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: How long will it run on a full tank?
A: The supplier gives about 14 hours at 25% load and 6.5 hours at 75% load in economy mode, from the 13.5L tank. Low idle mode slows the engine when demand is light, which is where most of the saving comes from. Heavier loads shorten the runtime.
Q: Can we track the carbon impact of the power equipment we order?
A: The free EDGE procurement portal includes CO2 and plastic usage impact measurement on your orders. Each project can have its own budget, users and delivery addresses, so reporting stays project by project. Reports are available through EDGE from CMT Group.
Q: How do we know the generator meets UK requirements?
A: The rating plate carries UKCA and CE markings, along with the performance class and IP rating. Our dedicated compliance team checks that the products we supply meet the relevant UK regulations and standards. We hold ISO 9001:2015, ISO 14001:2015, CHAS Elite and SSIP accreditations.
