Wood Gasifier Generator for Sale: 7 Checks Before You Buy

Type "wood gasifier generator for sale" into a search bar and every page you get is a seller. A packaged genset from California, three European CHP manufacturers, and a wall of marketplace listings with price ranges so wide they mean nothing. None of them tells you which spec lines decide whether the machine pays for itself or sits in a corner after the first clinker.

This is the comparison the sellers do not write. We build gasifiers ourselves, for waste rather than clean wood, so the numbers below are the ones we would check if we were spending the money.

What is actually for sale when you search this

The listings fall into three tiers, and they are not the same product.

Packaged small gensets. The reference unit is the All Power Labs PP30, rated at 25 kW at 60 Hz and 22 kW at 50 Hz when grid tied, dropping to 22 kW and 18 kW off grid. It is a gasifier, filter train and engine on one skid, sized for a farm, a clinic or a remote workshop.

European wood CHP plants. Vee Energy, Burkhardt and the HKA series are built for buildings that can use the heat. The Vee wp3.160 delivers 160 kW electrical and 320 kW thermal from 561 kW of fuel input, which is 28.5% electrical efficiency and 57% thermal. These are not generators you buy to replace a diesel set. They are heating plants that happen to export power.

Marketplace listings. Chinese vendors list downdraft fixed-bed sets from 30 kW to 200 kW. A 30 kW Pulita set shows a price range of US$25,000 to US$1,000,000 on the same page. That is not a price. It is an invitation to negotiate, and the real quote depends on seven things the listing does not state.

The 7 numbers to compare before you pay a deposit

1. Continuous kW at your frequency, not peak

A gasifier genset is not a diesel genset. Output depends on the gas quality, which depends on the chip. All Power Labs says so on its own page: actual power is "highly dependent on the fuel shape, size and moisture content", and the PP30 needs a minimum electrical load of 3 kW, ideally above 5 kW, or the reactor runs too cold to make clean gas and fouls the filter. Ask the vendor for continuous rating at 50 Hz off grid if that is where you run. For the PP30 that number is 18 kW, not the 25 kW in the product name.

2. Kilograms of wood per kWh

This is the fuel bill. The honest figures cluster tightly: the PP30 uses about 1 kg of dry feedstock per kWh, rising to 1.2 kg at 20% moisture and 1.3 kg at 30%. The HKA 35, 45 and 49 containerized plants state 0.9 kg of wood chips per kWh electrical. Burkhardt's V5.90S runs at 120 kg/h for 160 kW, which is 750 g per kWh. If a listing claims much better than 0.75 kg/kWh, ask what moisture the figure assumes. If it gives no figure at all, that tells you something too.

3. Moisture and chip size limits

Every tier draws a hard line here, and the line is tighter than most buyers expect. HKA plants want natural wood with water content under 13% and fines under 30%. Vee quotes an ideal water content of 7% and G30 to G50 chips. Burkhardt specifies woodchips to the P31S M10 A1.0 class, meaning 10% moisture and 1% ash, and notes that its earlier plants ran only on ENplus A1 pellets. The PP30 tolerates up to 30% moisture but pays for it in kg per kWh, as the numbers above show.

Fresh-cut wood is typically far wetter than any of these limits. If you do not already own a chipper and a drying floor, add them to the budget before you compare machine prices.

4. Hours per day and hours per year

The single most important question, and the one marketplace pages never answer. The PP30 is designed for daily sessions of 8 to 16 hours, after which the ash vessel and cyclone dust can must be emptied before the machine can run again. Its 88 gallon hopper lasts 6 to 10 hours, or as little as 2 hours at full output on light chips. The HKA plants, built for the European CHP market, state an average of around 8,000 operating hours a year. That difference between a 12 hour machine and an 8,000 hour machine is the difference between a backup generator and a power plant, and it should decide which tier you are shopping in.

5. Warranty in hours, not months

The Chinese listings are consistent: Pulita offers one year or 1,500 running hours, whichever comes first, and the NPT 200 kW set gives 12 months or 1,500 hours. At 8 hours a day, 1,500 hours is about six months. Ask for the warranty terms on the gasifier and the engine separately, because they are often different suppliers bolted together.

6. Tar and gas cleaning

Tar is what kills small gasifiers, and it is the spec line least likely to appear on a sales page. The Pulita listing is one of the few that gives a gas analysis: CO at 20 to 22.5%, hydrogen at 10 to 12.6%, and nitrogen at 46 to 50%. That nitrogen is the ballast of air-blown gasification, and it is normal for the class. What the listing does not give is a tar figure or a filter change interval, so ask for both. Our own X-150 campaign in Paris ran 1,939 hours continuously with 99.98% tar conversion and 33% hydrogen in oxy-steam mode, and we publish those numbers because tar conversion and run hours are the two that matter. A vendor who cannot name theirs has not measured them. We cover what tar removal from syngas actually takes separately.

7. The feedstock list, including what is not on it

Read the suitability table before you fall in love with a price. The All Power Labs catalog rates hardwood and softwood chips of 10 to 50 mm as excellent, lists rice husks as under development, and puts straw, palm pressings and bagasse under review. Every European spec above says natural wood only. The pattern is the same across the whole class: these machines are built for clean, dry, dense wood, and nothing in the listing will tell you how they behave on anything else.

What the price ranges really mean

The only printed price list in the search results is the 2012 All Power Labs catalog: $17,995 for a 10 kW Power Pallet and $26,995 for 20 kW, which the company framed as $1.50 to $2.25 per watt. Those are old list prices and the models have changed, but they anchor the packaged tier. Marketplace pages show ranges like US$2,000 to US$500,000 for a 100 kW set and US$1,000 to US$80,000 for a 200 kW genset. These are placeholders to get you into a chat window.

What moves the real quote is everything the headline does not include: engine and alternator brand, CHP heat recovery, the gas cleaning train, commissioning on site, training, and sea freight for a machine that weighs as much as a small truck. We break down what each small biomass gasifier price tier buys if you want the full cost stack. One useful figure from the Vee data sheet is the parasitic load: the plant consumes 6.4 kW of its own output before drying. Subtract that from the nameplate before you compute payback.

When a wood gasifier generator is the wrong purchase

Here is the honest part. If what you have is wood, the machines above work, and the European units have the operating hours to prove it. If what you have is waste, you are shopping in the wrong aisle.

Hotel kitchen waste, sewage sludge, digestate, palm empty fruit bunches, mixed municipal waste: all of these carry ash, moisture and contaminants far outside the A1.0 and 13% limits on the spec sheets above. A clean-wood gasifier fed with them does not run badly. It clinkers and stops.

That is the problem the X-150 was built for. It is a containerized 150 kg/h fixed-bed downdraft platform that has been validated at COMETHA in Paris, at Fraunhofer IKTS and at Hochschule Zittau/Goerlitz on high-ash sludge, municipal waste and digestate, the feedstocks wood gasifiers exclude. The Paris campaign processed 16,382 kg of digestate pellets over 80 consecutive days. Its gas cleaning stage, SyngaPure, uses real-time sensing of tar, H2S, ammonia and particulates with AI control, and was selected for support under the German BMWK go-inno program in December 2025.

Two things to be clear about. Zero-X does not sell a wood gasifier genset, and the X-150 is not an impulse purchase from a marketplace listing. It is deployed through territory partners, and in the current target markets governments fund 56 to 70% of project CAPEX through documented grant routes, which changes the economics more than any discount a vendor can offer. If your feedstock is waste, start with our guide to small scale waste to energy systems, and if you run a resort, the specific case for waste to energy for hotels and resorts.

A buyer's checklist you can paste into your RFQ

Send these to every vendor on your shortlist. Any question that comes back unanswered is itself an answer.

• Continuous electrical output at 50 Hz and 60 Hz, grid tied and off grid, and the minimum load.
• Fuel consumption in kg per kWh electrical at 10%, 20% and 30% moisture.
• Maximum moisture, maximum ash, maximum fines and accepted chip size class.
• Designed hours per day and hours per year, plus the daily maintenance routine and how long it takes.
• Warranty in running hours for the gasifier and the engine separately.
• Measured tar content in the clean gas and the filter media change interval.
• Full feedstock suitability table, including what is explicitly excluded.
• Parasitic load in kW and what is included in the quote: CHP, gas cleaning, commissioning, training, freight.
• Three reference installations you can call, with their hours to date.

If you want the engineering behind these questions first, read how a gasifier generator works and what runs continuously.

FAQ

How much wood does a wood gasifier generator burn per kWh?

Published figures run from 0.75 to 1.3 kg per kWh electrical. Burkhardt states 750 g per kWh at 160 kW, the HKA plants state 0.9 kg per kWh, and the PP30 uses 1 kg of dry chips per kWh, rising to 1.3 kg at 30% moisture. A 20 kW load for 10 hours therefore needs roughly 200 to 260 kg of chips a day.

Can a wood gasifier generator run 24 hours a day?

It depends on the tier. Packaged small gensets like the PP30 are designed for 8 to 16 hour sessions followed by mandatory ash and cyclone emptying. European CHP class plants such as the HKA series state about 8,000 operating hours a year, which is near continuous. Ask for designed hours per year, not just a yes.

How long is the lead time on a wood gasifier generator?

Power Pallets are built to order and normally ship about 90 days after payment. Chinese marketplace vendors quote 30 to 90 working days after a down payment, before sea freight and customs. Plan for a quarter at minimum, and longer if you still need a chipper and a drying setup.

Can I run a wood gasifier generator on waste instead of wood chips?

Not a clean-wood unit. Vendor feedstock tables rate wood chips as excellent and list straw, husks and bagasse as under review, while European specs demand 1% ash and 10% moisture. Waste feedstocks such as sludge, digestate or mixed municipal waste need a reactor designed for them, which is the gap the X-150 fills with its 1,939 hour continuous campaign on digestate.