EXPORT CONTROL

Export control is a term given to limiting the amount of solar being fed into the grid. Rules for power export differ globally for various reasons. Utility grids have have limitations with regards to how much PV or renewable energy penetration they can handle without affecting power quality or resulting in a transformer blowout. Generally this is not an issue, certain sections of the grid – especially those with a high penetration of solar energy systems – may be more susceptible.

 

 

 

 

For this reason, networks may limit the size of solar systems allowed on the network, subject them to a case-by-case review, or require that an export control device be installed for them to be approved. Frequently, including an export control device in your system will earn an automatic ‘green light’ for grid connection approval, without the need for the bureaucracy to get involved for what can turn into lengthy review processes.

TYPES OF EXPORT CONTROL

Solar Smoothing:

The generation of a PV system is not always smooth and consistent; shading from nearby objects or cloud formations can result in an output curve that is inconsistent or unstable. The unpredictable nature causes disruption to local utility companies, who ensure that electricity supply matches demand. A solar smoothing device that is generally compiled with a battery helps to improve the consistency of energy production by absorbing some of the peaks and discharging during the troughs.

 

 

 

 

 

 

 

 

 

 

 

 

Zero Export:

For zero export systems, solar energy produced by the solar PV system is not allowed to be fed into the grid. In the default approach, all solar energy produced that is in excess of demand is curtailed. In some cases excess energy can be utilised to charge a battery for evening use.

 

 

Solar Feed-in Management:

This is when the utility company may pre-program or remotely control inverters to switch off when your solar export reaches a set threshold. With this crude approach, it may be the case that you lose all of your solar energy production for as long as your system’s output remains above the threshold. An alternative approach is for the solar energy to be curtailed if it exceeds the threshold, therefore any energy above the allowed limit is shunted into earth; this approach is less wasteful than the first.

 

YOUR EXPORT CONTROL PARTNER

i-kWh's expertise in control systems and PV design are utilised to provide detailed and efficient PV designs to limit solar energy wastage, provide the lowest cost of energy to the end client while ensuring legislation is followed.

Our team will perform a full energy audit, assessing the energy usage, as well as power quality analysis. The kWh-box is installed on site and accessed remotely. Once assessed, we will provide a full detailed design based on our findings that resolve any power quality issues, and a robust zero-export PV system that reduces utility bills.

Our kWh-box energy audit system is designed to be plug and play, and can be purchased or rented for any duration of time.

 

 

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