Got a question? Let us answer it for you.

As a company with a long history in remote power, we are often asked questions that we believe would be helpful to a broader audience. We have listed some of these questions and answers here.

What information is required for TEG or TEG System quotation?

  • End destination country
  • Application type
  • Constant loads (amps, voltage, watts)
  • Intermittent loads (amps, voltage, duty cycle)
  • Maximum and minimum ambient temperatures
  • Fuel type (Natural Gas or Propane)
  • If natural gas, what is the gas composition, pressures and temperatures?
  • Autonomy of battery back up if required

With the above information, you can submit your quote request online in our Get a Quote form.

How much power do I need?

When it comes to remote power, every watt counts. When loads are overestimated, the system becomes unnecessarily complex and expensive. Conversely, underestimating loads can result in power failures. We can work with you to properly size your remote power system. To do this we start with analysis of all the system loads. Definition of all the power requirements, including different power and voltage levels, equipment duty cycles and autonomy requirements is crucial. Site location details are also required to consider renewable energy technology potential, temperature, site access restrictions and fuel options.
In remote power systems, the main source of power is designed to supply the average power and recharge a battery bank. The battery bank supplies intermittent peak loads and autonomy in the event of system failure. This allows the remote power source to be size much smaller than the peak load requirements.
In traditional AC grid sites power is plentiful and loads can be estimated with large and multiple safety factors. Most electronic equipment runs on DC power, however is supplied with AC adaptors which add unnecessary losses to the remote power system. Switching loads to DC wherever possible and using energy efficient devices like LED lighting can both reduce size and increase the reliability of a remote power system.

Please contact the sales team at Gentherm GPT to receive a load calculation spreadsheet to help you calculate your remote power needs.

If I turn the fuel pressure down, will it help me on fuel consumption, or will this hinder performance?

Yes, turning down the pressure will reduce fuel consumption. It will likely reduce the power output and will not damage the unit in any way or affect the life of the system.

How long will a power unit on a TEG usually last?

TEGs have a 20-year design life, but over the years have demonstrated a life up to 30 years.

How loud are GPT's Thermoelectric Generators (TEGs)?

TEGs are very quiet relative to most other power generators. Because there are no moving parts, the only source of sound is the gaseous fuel burner. This is one reason TEGs are well suited to security and surveillance applications. Please contact GPT for details, as the noise level varies by product and we may be able to arrange for you to 'hear' one in our test facility.

Can you put the systems together if your site grows – like batteries?

Yes. Additional TEGs can easily be added in increments over time and "ganged" together.

Can I add a TEG to supplement an existing off-grid solar power site? 

A TEG system is designed to float charge a battery and supply the average load of a remote power system. As a result the battery is sized for the autonomy requirements i.e. 24 hours. Conversely a solar system needs several days autonomy to perform reliably. Simply adding two solar panels to a typical system would normally not add to the functionality of the system. The entire system including TEG, battery and solar panels need to be carefully sized to provide the desired reliability while optimizing fuel consumption.
GPT Solar Hybrid utilizes solar energy as its primary source of power. The TEG only operates during the worst solar conditions which reduces the size of the PV array and battery bank and minimizes fuel consumption. For redundancy, the TEG is sized for full backup and autonomy of the load.
A small number of solar panels can supply a limited amount of power and needs to be paired with several days of battery autonomy to be effective. For example two 140W panels can provide 280W of power during peak sun conditions. In the summer you may get several hours of peak sun production, however in the winter months this may drop to 1 to 3 hours on average. Even assuming three (3) hours a day of full sun, the panels are not producing for most of the day. This reduces the average panel output to approximately 35W prior to factoring in system losses or temperature, shading and panel soilage effects.

For more information, GlobalSolarHybrid sheet provides an overview of increased reliability and the SolarHybrid web pages offer additional indepth information.

Do you have any suggestions for operating LPG systems in extremely cold temperatures?
Providing that you are operating above -20C there are a number of options suggested:

  • Plan to fill your tank just before the coldest season to have as much wetted tank surface as possible in contact with outside air.
  • Locate fuel containers in sunny, wind protected site.
  • Take advantage of insulating value of deep snow drifts where possible.
  • Provide insulation from low ambient temperatures using an enclosure, straw or other such material.
  • Paint tanks with dark color to absorb the sun's heat.
  • Use LP gas vaporizers if necessary and where practical. (Vapourizers also consume fuel)

If you expect temperatures below -20C  or above 45C we would recommend you speak to a GPT representative for a more customized solution.

Can the TEG run at very low temperatures?

The TEG is a robust device and can be stored and operated at temperature extremes and all weather conditions. However, in a tanked fuel application we recommend propane storage provisions to ensure adequate vapor pressure is supplied to the generator. Passive methods like filling the tank before winter, painting a dark color or insulating the tank and lines are cost effective options.

Don't see what you need?

Contact us with your questions directly or via our home page (top of page button) 'Ask the Experts' form.  GPT will continue to update this section.

Gentherm Global Power Technologies*(GPT)  Remote power products are designed for a minimum 20-year service life.

  • check marks GPT solutions are known for their ability to operate reliably in any environment.
  • check marks There are 35,000+ GPT products installed in 55 countries.
  • check marks GPT has received the Canada Export Award three times as well as a special Lifetime Achievement Award.
  • check marks GPT's head office is in Calgary, Alberta, Canada.
  • check marks GPT has corporate offices in Canada and the U.S. and authorized sales representatives throughout the world.
  • check marks GPT and its employees are active contributors to its customer communities through charitable donations and volunteer work
  • check marks GPT provides:
    Power where you need it.®

 Global Thermoelectric