Off Grid Power in Liberia 


APL's PP30 Power Pallet

Introducing the latest Power Pallet biomass-powered genset, the new PP30. Now with a continuous 25 kW electrical output at 60 Hz. We are also including grid-paralleling functionality, Combined Heat & Power, and noise-reducing engine enclosure, as well as emissions controls, all as standard equipment.

This is our most advanced Power Pallet ever, achieving an unprecedented 80% maximum efficiency of thermal+electrical energy. We achieve this with our unique three-stage CHP system along with our already unparalleled yield of more than a kilowatt hour of electricity per kilogram of biomass.

We’ve also upgraded the PP30’s engine and filtration system, now using a Heavy Duty Ashok Leyland 4.0 liter engine and clean-in-place bag-house filter solution, made even more effective and durable by precise temperature control for tar and water dew point management.

All Power Labs is the global leader in small-scale gasification. We make biomass gasifier generators that are ready for everyday work, to serve real-world distributed-energy needs.

Our Power Pallet and Powertainer are a new category of energy device. They combine the best usability features of diesel generators, with the clean running of typical renewables, with the potential for a carbon-negative impact.

Our project started in 2008 with the open-source Gasifier Experimenter’s Kit (GEK), supporting research, education and DIY hacking in biomass thermal conversion.  Over a decade later, the GEK has evolved into the Power Pallet, a full solution for commercial power generation via biomass. Today you can find our systems at work in dozens of countries around the world, and supporting research in over 50 universities.

With APL products, you can generate on-demand power for 1/4 the operating cost of diesel, at 1/2 the capital cost of solar.  And while saving money, you can shrink your carbon footprint and contribute positively to global efforts against climate change.

Getting Energy and Climate Right

The stakes in getting energy and climate right are daunting. The sheer volume of carbon we’ve dug up from ancient reservoirs since industrialization and returned to contemporary circulation is difficult to get the mind around–we’ve collected some of the details here. So far we’ve mostly been able to ignore the consequences of this tomb-robbing, as the temperature rise from CO2 accumulation lags by decades, if not centuries.

APL Carbon-Negative Machinery: Today and Future

The process of gasification is an incomplete one, and the leftover “waste” our equipment produces from making energy is a stable form of carbon known as ‘biochar.”  Sequestering this carbon is what makes biomass gasification net carbon-negative energy production.

While today’s APL Power Pallets produce a relatively small amount of biochar byproduct (around 5% of input mass), it is still enough for carbon negativity in the fuel cycle. The round rule of thumb numbers are as follows:

  • 1 tonne of dry biomass in produces about 1Mw/hr of electricity and 50kg of carbon byproduct.
  • 50kg of raw carbon once recombined with O2 is the equivalent of 185kg of CO2 in the atmosphere. (mass C x 3.67 = mass CO2)
  • 1 tonne of biomass input to the gasifier can soil-sequester the equivalent of 0.185 CO2 tonnes in the atmosphere.
  • Avoided CO2 emissions from not burning fossil fuel in the process are added to the wins above.

Future APL machines, including our new Chartainer Biochar Pyrolizer, will introduce features that enable increased biochar yield of up to 15-20% of input mass, while still co-generating electricity and/or heat. Our pilot Chartainer is producing 40kr/hr of high-quality, high-temperature, geo-conducting biochar!

For now, we are just using the 5%-of-input post-hearth char in our work with our drawdown project: the Local Carbon Network. We are discovering that the impact of this biochar, especially when co-composted and used in organic agriculture, is much more significant than we had expected. We are seeing values of up to 40kg CO2e per 1kg biochar! Check out Austin Liu’s excellent analysis on the LCN Site.

You can learn more about our carbon analysis here. You can also read fantastic coverage of the run up to COP21 in The Guardian. And for an extraordinary insider’s perspective, we’re really enjoying the blog Winning the Carbon War by Jeremy Leggett.


World map showing apl installations

To see specifics of how our machines are helping to solve the global crises in both energy availability and climate change, visit our Projects Page. or click on one of the various use-case scenarios below

Developing World
Dev World
Commercial Power
Waste Management
Grid-tie &
Feed-in Tariffs
Heat & Power
Research &
Power & Play
Wood Gas T