Standby vs Portable Generators: An Honest 2026 Comparison | EU
Standby vs Portable Generators: An Honest Comparison Most “standby vs portable” articles online are written by retailers who only sell one of them. We sell neither bias — we sell standby units, but the honest answer is that portable generators are the right choice for a large share of buyers, and the wrong choice for a different large share. Here’s how to know which group you’re in.If you’re earlier in the process, our home backup generator buyer’s guide covers sizing, fuel and total cost — this post is the fork in the road that comes before all of that. How They Actually Differ Table Portable Standby Purchase price €400–€1,500 from €2,480 installed-unit (13kW Briggs) Startup Manual, in the rain, possibly at 2 a.m. Automatic, under 60 seconds, even when you’re away Capacity 2–8 kW typical 13–26 kW residential, far beyond Fuel Petrol, stored in jerry cans Natural gas or LPG, plumbed in Runtime 8–12 hours per fill Effectively unlimited on gas Installation Extension cords Fixed install + transfer switch Noise 65–75 dB(A) under load ~60–68 dB(A), quiet weekly self-test Whole-house heat pump / well pump No Yes, if sized correctly Where Portable Generators Win Your outages are rare and short — a few hours a year, not days. Budget is the binding constraint — a €600 portable plus an inlet box covers essentials for under €1,000. You need power elsewhere — camping, market stalls, job sites. A standby unit never leaves home. You rent or plan to move — portables travel; standby units are part of the building. Choose an inverter model for sensitive electronics — clean power, quieter running, and far better fuel economy at light load. Where Standby Generators Win You leave home. Winter outage while you’re abroad for a week is the single strongest argument — frozen pipes don’t wait for your return. Heating matters. A portable won’t run your boiler or heat pump. A properly sized standby keeps the house warm indefinitely. Fuel logistics. Petrol goes stale, storage is limited and refueling a hot generator in a storm is genuinely unpleasant. Gas and LPG arrive by pipe or tank. Safety. Standby systems transfer power automatically and legally. Portable backfeeding through a window lead kills utility workers every year — and a proper transfer switch removes the temptation. Load size. Fridge, freezer, boiler, pumps, kitchen, office — past about 6 kW of essentials, portables run out of road. The Hidden Costs of the “Cheap” Option A €600 portable rarely stays €600: fuel stockpiling, stabilizer, oil changes every 50–100 hours, a weather cover, maybe an electrician-installed inlet and manual transfer switch (€300–€800), and eventually the inverter upgrade when the noise wears the household down. Over ten years of regular use, the honest total-cost gap narrows considerably — and a standby unit adds resale value to the property, which a portable never will. The Decision in Three Questions How often and how long do you lose power? Rare/blinking → portable. Multi-day events → standby. Must it work when nobody’s home? Yes → standby, automatically. Only when you’re there → portable is viable. What’s on the must-run list? Essentials under ~6 kW → portable with a proper inlet. Heating, pumps, workshop → size properly with our kW sizing guide and go standby. FAQ Should I buy a standby or portable generator? If outages are rare, short and you’re always home — portable wins on value. If outages last days, you travel, or heating must never stop — standby wins, and it isn’t close.Can a portable generator power a whole house? Not realistically. Whole-house loads start around 15 kW; portables top out around 8–10 kW at continuous rating. Essentials-only is the honest portable ceiling.Do I need a transfer switch for a portable generator? If you want to power hardwired circuits (boiler, well pump, fixed lights), yes — an inlet and manual transfer switch, installed by an electrician. Extension cords to free-standing appliances are the only cord-only safe option.Are standby generators loud? Modern residential units run about 60–68 dB(A) under load — roughly conversation volume at the property boundary — and far quieter in their automatic weekly self-test.What about inverter portable generators? They’re the best portable choice for electronics and noise, at roughly double the price of a conventional open-frame unit. For occasional outage duty, they’re worth it; for whole-house goals, they’re still a portable.