Op-ed by Yusuff Wale, Managing Director, Wärtsilä Marine & Power Services Nigeria Ltd

“Without flexibility, Nigeria will face difficulties integrating large amounts of renewable energy into the grid”

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Gabriel Kroes to address the Power Generation Summit

The upcoming Power Generation Summit will feature a host of expert speakers, including Mr. Gabriel Kroes of IMPower speaking to the topic of PV Solar and Battery Storage.

The Summit will take place as a virtual online conference on the 25th September 2020 and provides complimentary access for all delegates to attend and to participate in the discussions.

Given his vast experience in the PV Solar and battery storage markets, as well as being Head of Engineer at IMPower, Mr. Gabriel Kroes will provide insightful thought-provoking content in his presentation.  Having developed solar and battery solutions of up to 10MW as distributed and embedded generation predominantly to the C&I markets, he holds over a decades’ worth of experience within the broader energy space-based in Cape Town. 

Furthermore, Mr. Kroes has led several teams working on numerous asset management and engineering projects, energy efficiency projects and renewable energy and energy storage (battery) projects in Southern Africa and abroad. Mr. Kroes led energy market research projects for the CTCN (UNDP) across 10 Southern African countries and was intricately involved in the sizing, site evaluation and modelling of the ESKOM battery project.

Supporting his speaking role, Mr. Kroes will be chairing the full day Summit.

About IMPower Pty LTD

Founded in 2014, IMPower Pty Ltd is a leading engineering, procurement and project management contractor (EPCM) operating in the solar and energy storage industry. We have a primary focus on providing Commercial and Industrial (C&I) clients with tailored, expert energy solutions. Our engineered solutions incorporates not only world-leading products and engineering methodologies but also our set of value based principles, integrity, honesty and respect, ensuring that your system is built to last and matches your expectations. IMPower is a BBBEE Level 1 organisation.


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SOLAR | One change that will change our destiny

Comment piece | Daniel Goldstuck, SAPVIA Grid Access Working Group Chairperson

What if I told you that our energy crisis could be alleviated with one simple change?

Sounds ridiculous, doesn’t it? But, as a professional, with almost a decade of experience working in the energy space, I can tell you that it is that simple.

Every individual across South Africa has felt the ongoing impact of load-shedding, both at home and at work. Surely, there must be insurmountable obstacles or surely we would have solved the issues and be operating at full capacity, with an economy unfettered by load-shedding and increasingly damaging down time.

There is just one single change that the Minister of Mineral Resources and Energy can make. A change that would increase power supply, cut future load-shedding by at least two stages and prevent the recent wastage on expensive diesel, all while both saving and creating jobs.

So what is that change?

It is to move the current exemption from licencing from 1 MW to 10MW for energy generation installations.

Currently, 1MW can supply a small mall, while 10MW at the higher end is suitable to feed into a mine or industrial facility.

The Electricity Regulatory Act of 2006 governs the various stakeholders of the electricity supply industry, and regulates participation in the form of licenced activities. One such licenced activity is the generation of electricity, which requires a Generation Licence.

Currently, generation capacity below 1 MW of power is exempt from obtaining a licence, requiring only registration with NERSA (the National Electricity Regulator of South Africa) upon obtaining permission to connect from the local Distribution Licence holder (either Eskom or a municipality) under a Connection or Use of System Agreement.

This is an arbitrary limit set as a policy decision, and has no technical basis.

Operators working in both renewable and traditional energy propose the increase to 10MW because that capacity limit can be absorbed with minimal upgrades by a large number of substations, or nodes on the distribution network. This would also fit within the power consumption profile of many industrial facilities. 

On March 26 2020 the Minister gazetted an amended version of Schedule 2 rationalizing the licencing exemptions applicable to generation facilities under 1 MW. However, disappointingly the 1MW licencing cap remained, missing a valuable opportunity to create lasting benefits to the entire electricity system and avoid serious load-shedding during the day while still allowing some head room for Eskom to carry out necessary maintenance. 

The ministry has previously expressed concerns around protection of the electricity network as well as job and Eskom revenue losses, however, these are all addressable.

Municipalities and Eskom may be concerned that allowing more generation would impact their revenue collection. As it stands, a large municipality shedding 200MW during a load-shedding event costs R40m a week, or R174m a month. Eskom has made provision for up to 8 stages of load-shedding, which will result in the majority of municipalities collecting 0% revenue from most suburbs for significant periods of the day.

And when we look at job creation, those fears can also be addressed. Increasing the share of renewable energy must and will be accompanied by a discussion of a Just Energy Transition to ensure access to affordable energy while enabling all South African citizens to participate in the related economic opportunities. 

All data I have analysed indicates a transition to increased renewable energy percentages or even replacements of coal power stations, will result in net-positive job creation. I agree, serious work needs to be done to ensure the specific individuals impacted are re-skilled in a sustainable environment to be able to re-enter the new economic landscape.

But further, in a scenario where Eskom is shedding 6000MW in the middle of the day, adding MWs to the grid will have almost no impact on existing jobs, and in fact will result in greater job creation (4MW of rooftop projects can keep 31 site-staff employed for a year).

A recent SAPVIA (South African Photovoltaic Industry Association) estimate indicates that this change in legislation, shifting the limit for exemption from 1MW to 10MW, would enable 2000MW of PV to be installed within 12 months.

In the middle of the day, this is enough to shift load-shedding by up to two stages (e.g. from Stage 4 to Stage 2, or from Stage 2 to not at all), reducing the need to run expensive diesel generation if capacity is constrained, but not yet at levels to trigger load-shedding.

This would create jobs for 15,500 site staff, and approximately 2000 office based junior and mid management jobs. I have not yet quantified the job creation potential of related downstream manufacturing and services providers.

Energy would be available from these plants far sooner than energy from any national procurement program currently under discussion.

The Minister and other stakeholders must grasp the opportunity that renewable energy presents, not just from a supply perspective but also because it directly addresses the potential job-losses in the coal sector and the fear of lost revenue at Eskom. Without a fully operating power system, we will have less jobs and less revenue for Eskom. In contrast, with the appropriate legislation, we can create a much more robust electricity supply environment catering to multiple requirements of economic growth.

If the grid can absorb the power, the municipalities can continue selling power and jobs can be created, all while avoiding a further crisis at no actual cost to the government or tax-payer, why would we not make one simple change?

Changing one number, on one piece of legislation, can deliver wins on all the levels required.

  • Goldstuck is the Grid Access Working Group Chairperson at the SA Photovoltaic Industry Association (SAPVIA), an organisation representing the solar PV industry in South Africa.
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Benefits of using a grid-tied system during the pandemic

Electricity continues to be a huge problem in our country during the pandemic, where further load shedding is being experienced due to cable theft. This not only impacts the residential sector but also both commercial and industrial power users. A solution to alleviate the lack of security of supply is by installing solar panels and batteries at businesses or households, especially at essential services such as hospitals where power is needed the most. Given the impact of the pandemic, hospitals need constant power to ensure patient’s care.

Solar panels coupled with a battery storage solution provides a good alternative for the medical fraternity. Such an installation results in reduced consumption of grid power, yielding immediate savings through a lower monthly electricity bill.

The Head of Engineering for IMPower Pty Ltd, Gabriel Kroes, explained that the solutions have been designed to partially displace municipal power with more affordable and cleaner energy. 

“These systems are therefore designed to save you money, however, they do not typically have the ability to function as standalone systems during a blackout/loadshedding as it does not include battery/storage technologies. Battery storage or generator integration would need to be added to enable the technology to function during a blackout,” said Kroes. 

Batteries are useful for in the following scenarios:

1.Curtailment Reduction/Deferral: Storing excess generation so that you can use it when you need it (if you have excess generation).

2.Arbitrage: Displacing “peak” energy consumption and therefore, peak energy costs. Basically swopping out solar energy or even cheap “off-peak” grid energy for “peak” grid energy, so that you can benefit from the cheaper tariff. This is called energy arbitrage. A simple example is to charge the battery at let’s say R1 per kWh during off-peak times and then to discharge this energy during peak times when energy charges would have been R2.50 per kWh. In this case, you are saving R1.5 per kWh for the energy that flows through the battery.

3. Backup: providing electricity when the grid is off. This is very similar to mini or micro-grid solutions where the solar PV and battery system operates as a “stand-alone” energy supplier to the off-taker. Usually, to save costs, these systems are only designed to provide power to essential loads such as emergency lighting, security, servers.

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