1 MW PV-Diesel Hybrid Solar Project, Zimbabwe

Power from diesel gensets have provided hundreds of gigawatts to industrial companies and states all over the world. Yet the rising costs of fuel and the additional transport and storage charge may put their main electricity source in jeopardy. Also, the power grid in many regions of the world can be unreliable or unavailable. This is why Industrial companies and states are turning to alternative energy sources.

In recent years, PV system and batteries storage cost have steeply dropped making it an affordable energy source for companies in remote areas. Using only a PV system and solely relying on the solar irradiation (even if there’s plenty of it and it’s free), isn’t a safe bet for an industrial consumer as PV production can be inconsistent. This is why Industrials are resorting to PV Diesel hybrid system.

For such a complex energy generation, an energy management system like ePowerControl is required and help to increase the reduction of consumption of fuel depending on the configuration. But before talking about such advantages, let’s dive deeper and see what is it and how it works.

What is a solar diesel hybrid system?
Solar hybrid systems are power systems that combine solar power from a photovoltaic system with another energy source. One of the most common hybrid systems being PV diesel hybrid system, coupling PV and diesel generators, also known as diesel gensets. The diesel generators are used to steadily fill in the gap between the load and the power generated by the PV system. Battery storages can be used to enhance the overall system performance to ensure that the amount of energy meets the demand. An energy management system can also be included to optimize the system as the diesel gensets capacity is limited and the solar energy production is inconsistent.

How does a photovoltaic (solar) diesel hybrid system work?
Depending on the consumer and their situation the main energy can be the grid power, the PV system or the diesel genset. When it is tied to the grid we would talk about on grid system and when it’s isolated, this is an off-grid system. (poor grid to link)

In any case, those energy sources are used to complements one another. Whether the goal is to fill in the gap made by grid failure or to reduce fuel expenditure, the PV system can supply additional energy. Batteries can also be used to store the excess energy to be used later on.

An energy management system like ePowerControl can ensure fuel saving and optimal operation of the overall system.

What are the advantages of a solar diesel hybrid system?
There are multiples benefits to solar-diesel hybrid system.

Increased PV penetration:
Voltage can be driven to unacceptable volatility or out-of-range values by PV solar systems, eOS solutions can be used to to support the integration of distributed PV solar on their grids.

No wasted Energy:
With the right equipment, the energy generated during the day is not wasted or fed back into the grid. It can be stored and used whenever needed.

Uninterruptable Power:
When the grid fails or when the PV production isn’t enough the system still keep going.

Hybrid Systems can be programmed:
With the help of a EMS like the ePowerControl, hybrid systems can computer control their whole system and balance the available sources of energy. Elum Energy’s engineer can provide a custom control and monitoring solution giving more reliability and more savings as it reduce operating and maintenance cost in the long term.