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Nordic Winter Landscape-1

Reliable Starts for Standby Generators in Cold Conditions

Keep standby generators ready for reliable starts in cold Nordic conditions while reducing unnecessary energy use from continuously running heating systems.

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Preheating Solutions for Standby Generators

The Right Engine Temperature Supports Reliable Starts

Maintaining the right engine temperature is essential for reliable generator performance. Hotstart preheating systems keep standby generators warm and ready, reducing cold-start risk and ensuring predictable operation when power is needed.

Most standby generators rely on block heaters that run continuously, consuming significant amounts of electricity to maintain temperature – often without operators being aware of the total energy use. This leads to unnecessary energy costs and inefficient operation. Hotstart uses high-efficiency heating to maintain precise temperature, reducing energy use and operational costs, with particularly strong savings potential for sites with multiple generators.

The solution is designed for both new installations and retrofit, allowing seamless integration into existing generator systems. For facilities with multiple standby generators, the combined energy savings can result in substantial cost reductions over time. As an approved Hotstart partner in the Nordics, BOS Power provides local expertise for implementation, upgrades, and ongoing support.

Benefits with Hotstart:

  • Reliable startup in low temperatures
  • Reduced engine wear and thermal stress
  • Stable and predictable generator performance
  • Reduced energy consumption compared with continuously running block heaters
  • Easy integration in new and existing systems

 

CVC + vertical CVCHotstart's CVC High Efficiency Engine Heaters

What is Hotstart?

HOTSTART CVC is a high-efficiency engine heating system for standby generators. It uses air-source heat pump technology to maintain the correct engine temperature while the generator is on standby. This supports reliable starts in low temperatures while reducing energy use compared with continuously running electric heaters.

Get in touch to learn more.

 

Built for Reliability in Cold Conditions

Key Advantages

Reliability_icon
Prevent cold start failures
Ensure reliable generator start and reduce the risk of failure in low temperatures.
Constant uptime
Ensure reliable uptime

Keep backup power systems ready for immediate start, supporting continuous and predictable operation.
low-emissions_icon
Reduce energy consumption
Replace continuously running block heaters with more efficient temperature control, lowering unnecessary energy use.
Cost Optimization_Energy Savings
Lower operational costs
By reducing the energy required to maintain engine temperature during standby, the CVC can lower annual energy costs associated with generator readiness.
Modular
Simple implementation
Designed for both new installations and retrofit, allowing easy integration into existing systems.

High-Efficiency Engine Heating for Standby Generators

Most standby generators use continuously running block heaters, consuming electricity 24/7 – often without delivering efficient temperature control. This results in unnecessary energy use and higher operating costs over time.

Without Hotstart:
  • Continuous heating regardless of actual need
  • Unnecessary energy consumption
  • Uneven temperature control
  • Increased risk of delayed or failed starts in cold conditions

 

With Hotstart:
  • Temperature maintained based on actual conditions
  • Immediate and reliable start capability
  • Stable and predictable performance
  • Reduced energy consumption during standby

 

 

CVC Heater Savings - Thermosiphon

The chart compares energy use for a traditional thermosiphon heater and HOTSTART’s CVC heat pump system. Using air-source heat pump technology, the CVC maintains engine temperature with lower standby heating energy use. Actual savings depend on the generator and operating conditions.

Technology Insight

How Hotstart Supports Reliable Generator Performance

Unlike traditional electric resistance heaters, HOTSTART CVC uses air-source heat pump technology to maintain the correct engine temperature. This reduces energy consumption while avoiding overheating and ensuring consistent readiness.

Advanced systems capture and reuse heat from the surrounding environment, improving efficiency without compromising start performance.

From cold standby to ready operation. See how maintaining optimal engine temperature supports predictable performance when it matters.

Additional Insights
Installation and Evaluation

Explore installation and site evaluation to better understand how Hotstart solutions are implemented and optimized in real-world applications.

 

Installation of the Hotstart CVC system, showing how high-efficiency heating is integrated into a standby generator setup.

A practical guide to assessing generator sites to ensure correct sizing and optimal performance of Hotstart heating solutions.

 

Frequently Asked Questions

How much energy can the Hotstart CVC save?

Hotstart states that the CVC High Efficiency Engine Heater can reduce generator heating energy use by approximately 20,000 to 40,000 kWh annually per generator in suitable applications. Actual savings depend on factors such as engine size, existing heater configuration, ambient temperature and location.
How does the Hotstart CVC reduce energy use?

The CVC uses air-source heat pump technology to recover heat from the surrounding air and transfer it to the engine coolant. This requires less electrical energy than generating the same heat through electric resistance heating. Its variable-speed compressor also adjusts heat output according to ambient temperature, helping avoid unnecessary heating.
Can the Hotstart CVC be retrofitted to an existing standby generator?

Yes. The CVC is designed to integrate with existing standby generator heating systems. It is installed in series with the existing engine heater and can become the primary heating source, while the existing heater remains available as secondary heating when required.
Does the Hotstart CVC replace the existing engine heater?

Not necessarily. The CVC can operate together with the existing electric resistance heater. The systems are integrated so the CVC provides efficient primary heating while the existing heater can provide additional or secondary heat when needed. This also maintains heating redundancy.
Why do standby generators need to be heated?

Maintaining the required coolant and engine temperature during standby helps generators start quickly and accept load when backup power is needed. In cold conditions, proper engine heating is particularly important for reliable starting and generator readiness.
System Integrator

Talk to our specialists

From planning to operation, we help ensure your power system performs when it matters most.
Based on your setup and requirements, we identify potential risks and recommend solutions that secure reliable starts in all conditions.

Want to reduce the risk of cold-start failure? Connect with our specialists.

 

  • NORWAY
  • DENMARK
  • FINLAND
  • SWEDEN
TOUCH
Espen Kristiansen Senior Sales Manager

t. +47 476 54 844
Espen Kristiansen Senior Sales Manager
TOUCH
Espen Henningen Project Manager

Sales | Power Generation

t. +47 905 68 272
Espen Henningen Project Manager
TOUCH
Jess Thorsen CTO

Sales | Power Generation

t. +45 261 21 260
Jess Thorsen CTO
TOUCH
Jussi Mäkinen Sales Director Data Center, International

Sales | Power Generation

t. +358 406 208 918
Jussi Mäkinen Sales Director Data Center, International
TOUCH
Fredrik Petersson Country Sales Director

t. +46 761 458 035
Fredrik Petersson Country Sales Director

Technical information and energy-saving estimates are based on documentation from Hotstart. Results vary depending on generator configuration and operating conditions.

Source: Hotstart, High-Efficiency Heaters for Standby Generators.