No — never. This is the most important safety rule on this page. Every petrol engine produces carbon monoxide, an odourless, colourless gas that kills within minutes at high concentrations. Carbon monoxide poisoning from generators used in garages, sheds, conservatories and homes with open windows causes deaths in the UK every year.

Always run your generator outdoors in open air, at least 5 metres from any windows, doors or vents. Fit a carbon monoxide detector in your home before operating a generator nearby. There is no safe level of indoor generator operation — not even briefly.

Most inverter generators are designed to run for 8–14 hours continuously at 50% load on a full tank. Running at higher loads reduces runtime proportionally. Check the manufacturer specification for your specific model — runtimes in our product listings are at 50% load unless otherwise stated.

For extended use, allow the generator to cool for 15–20 minutes before refuelling. Never refuel a hot engine. Some models support extended runtime with larger external fuel tanks — check compatibility before purchasing aftermarket tanks.

For standard portable outdoor use powering appliances directly — no notification is required. You do not need to inform your energy supplier, Distribution Network Operator or local authority for normal backup use.

If you are connecting to your home's fixed wiring via a transfer switch or distribution board, different rules apply and a qualified electrician should carry out the work. Never connect a generator directly to your home wiring without a proper transfer switch — backfeeding is illegal and dangerous.

Not directly — and never using a male-to-male plug cable (sometimes called a suicide cable or backfeed cable). This practice is illegal in the UK and potentially fatal. It sends live voltage back into dead street wiring, creating a lethal hazard for grid engineers working on the fault.

If you want to power your home circuits from a generator, a qualified electrician can install a manual changeover switch or automatic transfer switch (ATS). The maXpeedingrods 8000W on this page includes an ATS interface for exactly this purpose. All other connections should be made by plugging appliances directly into the generator's outlets via extension leads.

Continuous watts is the power the generator can sustain indefinitely — this is the figure that matters for sizing. Peak watts is the maximum power available for a fraction of a second to handle motor startup surges from appliances like fridges, freezers and boiler pumps.

Always size your generator based on continuous watts for your running load, plus enough peak headroom for the highest startup surge in your setup. A fridge-freezer drawing 200W continuously may need 1,200W peak to start. If your generator's peak rating can't meet that surge, it will trip or stall on startup.

Standard E10 petrol from UK forecourts degrades within 30 days in a stored container. The ethanol content absorbs atmospheric moisture, causing phase separation and forming an acidic sludge that clogs carburettor jets and ruins fuel delivery systems.

For storage longer than 30 days, use E5 super unleaded (available at most UK forecourts as the premium fuel option) and add a dedicated fuel stabiliser. Treated fuel can last 12–24 months. For generators stored over winter, either drain the tank and run the carburettor dry, or treat the fuel before storage. LPG on dual fuel models stores indefinitely with no degradation.

Not without protection. Running a generator in rain without a purpose-built weather canopy or shelter risks water ingress into the control panel and outlets, causing short circuits and electric shock hazards. The generator body may have some weather resistance but the sockets and connections are not designed for direct rain exposure.

Purpose-built generator canopies are available online for around £30–£60 and allow safe outdoor operation in wet conditions while maintaining adequate ventilation. Never use a tarpaulin draped directly over a running generator — it restricts airflow and creates a carbon monoxide accumulation risk.

Yes — and because backup generators sit unused for months, active maintenance is essential. Key tasks are checking and changing oil (every 50 hours of use or annually), replacing spark plugs (annually or every 100 hours), cleaning the air filter (every 25 hours), and treating or draining fuel before storage.

The most important habit is a monthly test run — 20–30 minutes under load. This keeps the engine lubricated, circulates fresh fuel through the carburettor, charges the electric start battery and confirms the unit will start when you actually need it. A generator that fails during a power cut because it hasn't been maintained is worse than no generator at all.

A fridge-freezer draws 150–300W continuously but needs 800–1,200W peak to start the compressor. A gas boiler draws 80–150W continuously with a 300–500W startup surge. Running both simultaneously requires a generator with at least 1,800W continuous output and 2,000W+ peak capability to handle both startup surges safely.

Add your home office (200–400W), WiFi router (25W) and basic lighting (50–100W LED) and you are looking at around 2,000W continuous total. A 2,300W–3,000W continuous generator gives comfortable headroom. The maXpeedingrods 2300W, Hyundai 3.3kW or any of the 3,000W+ units in our home backup tier would handle this load comfortably.

For standby backup generators — yes, in most cases. The key advantage is that LPG propane stores indefinitely without degradation, unlike petrol which degrades within 30 days. A generator stored for months on LPG will start and run reliably when you need it. The same generator on old petrol may not.

The Champion 2200W dual fuel model on this page achieves 34 hours runtime on a single LPG cylinder — far beyond what any petrol tank can offer. The price premium over the petrol-only Mighty Atom is modest. For home backup specifically, dual fuel is a meaningful upgrade. For regular camping use where you always have fresh petrol, the petrol-only version is perfectly adequate.