Gentech 8.5kVA Kohler Powered Diesel Generator w/ E-Start ED8500KSRE
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The Owner's Insights on the Gentech ED8500KSRE 8.5kVA Kohler Diesel Generator
The Kohler KD425 is what you're actually buying. At this money you're not paying for the frame, you're paying for an engine your diesel mechanic already knows, with parts on the shelf and a service life measured in thousands of hours rather than hundreds.
The 34 litre tank is the other half of it. At 80% load it burns 2.6 litres an hour, which is 13 hours. That's your full working day at heavy load without touching the fuel, which is a completely different proposition from a petrol unit you're refuelling twice a shift.
Be realistic about two things. It's 165kg, so it's not going anywhere without your forklift or a trailer. And it's 80 dBA at seven metres, which is a diesel doing its job.
Why You'll Love the Gentech ED8500KSRE 8.5kVA Kohler Diesel Generator
- Kohler KD425 diesel. The engine your mechanic can service and get parts for.
- 8.5kVA, 9.5kVA alternator. Headroom in the alternator, not just the number on the badge.
- 13 hours at 80% load. Your full day flat out on the 34 litre tank.
- 2.6 litres an hour. Diesel economy at heavy load, not petrol economy.
- Electric start with recoil backup. Two ways to start it when your downtime isn't an option.
- 12.5hp at 3,000 rpm. The grunt to take your heavy loads without sagging.
- Single phase 230V. Two 15A outlets, straight into your gear.
- 165kg. Built heavy, so it sits stable and lasts.
Why You Should Consider a Gentech Diesel Generator
Gentech build diesel and petrol generators for the Australian trade and rural market, and the ED8500KSRE is their Kohler-powered single-phase diesel. See the rest of the Gentech range.
Gentech ED8500KSRE 8.5kVA Kohler Diesel Generator Specifications
| Model | ED8500KSRE |
| Power rating | 8.5kVA |
| Model rating (0.8pf at 50Hz) | 8.5kVA |
| Alternator rating | 9.5kVA |
| Phase | 1-phase |
| Voltage | 230V |
| Engine model | Kohler KD425 |
| Engine speed | 3,000 rpm |
| Engine horsepower | 12.5hp |
| Starting system | Electric start with recoil backup |
| Fuel type | Diesel |
| Fuel tank capacity | 34L |
| Fuel consumption at 80% load | 2.60L/hr |
| Operation hours at 80% load | 13.0 hours |
| Noise level at 7m | 80 dBA |
| Outlets | 2 x 15A |
| Dimensions | 876 x 546 x 700mm |
| Weight | 165kg |
Why the engine brand is the whole decision
At this price the difference between the generators you're comparing is the engine, not the frame. The Kohler KD425 is a known commercial diesel: parts are available across the country, any diesel mechanic recognises it, and it's built for continuous running rather than occasional use. A generator with a no-name engine costs you less and is worth nothing the day it needs a part. If you're buying something to run for years, that's where your money should go.
Diesel or petrol at this size?
Diesel wins on the two things that matter when you're running long hours: your fuel economy under load, and engine life. At 80% load this burns 2.6 litres an hour and runs 13 hours on a tank. A petrol unit of similar output burns more of your fuel and works harder to do it. The trade is upfront cost and weight. If your generator runs a few hours a year, petrol is the sensible buy. If it works for a living, diesel is.
What the 9.5kVA alternator rating means
The generator is rated at 8.5kVA and the alternator is rated at 9.5kVA. That gap is deliberate: it means the alternator isn't working at its own limit when the engine is working at its limit. In practice that's what stops your output sagging when a motor starts up, and it's part of why a properly built unit costs more than a marginal one. Add up your loads against the 8.5kVA figure, not the 9.5.
Moving and siting 165 kilos
This is not a generator you lift. Plan how it gets off the truck, where it lives, and how it gets to your job if it needs to travel: a trailer, a forklift or a tray with a crane. The upside of the weight is stability and build quality, but it does mean deciding on its home before it turns up in your yard. Ring the store on 03 7056 6732 if you want to talk through delivery.
Is 80 dBA a problem where you'll run it?
It's a diesel at 3,000 rpm, and it sounds like one. On your farm, your property or your site, that's normal and nobody minds. Near your neighbours or in any residential setting, it will be noticed. If quiet matters, a canopied or silenced diesel is the direction to look. Not sure what size or type you need? Try the Generator Finder, or call the store on 03 7056 6732.
What's Included
- Gentech ED8500KSRE 8.5kVA Kohler diesel generator
- Electric start with recoil backup
- 2 x 15A outlets
What's Not Included
- Diesel fuel
- Extension leads
- A trailer, forklift or crane to move it
- A cover, if it's going to live outside
It's a 165kg unit, so sort out delivery and where it's going before it arrives. If you're wiring it into a house or a shed, get a licensed electrician to fit a changeover switch: never backfeed through a wall socket.
Not Sure Which Diesel Generator Suits You?
The ED8500KSRE suits you if you need long-running single-phase power on a property, a farm or a site, and you want a Kohler engine behind it. It's the wrong pick if the generator only runs a few hours a year, where a petrol unit at a fraction of the price makes more sense, or if noise is a problem where you'll run it. Not sure what size you need? Try the Generator Finder, or call the store on 03 7056 6732 and we'll size it against your gear.