Screenshot 2019-08-11 at 20.15_edited.jpg

TWIZZA | Grid Tied Solar PV





OVERVIEW:

After extensive energy management and energy efficiency measures with Twizza, a Solar PV System was installed to reduce dependency on the national grid. We installed 2 700 solar panels covering 5 500 square meters that can generate 1.5 million kWh annually. This means 1 of every 3 plastic bottles is produced using solar energy – reducing Twizza’s carbon footprint by 18%.

 

SIZE: 905 kWp

SAVINGS:

  • Reduced energy requirement from the national grid to curb the rising costs of electricity

  • Bulk electricity supply to buy power at a cheaper rate

ENERGY SECURITY: Decentralised dedicated supply generators

MOUNT: Rooftop


 

Tiers of Involvement

We offer three tiers of involvement, each adding a deeper layer of insight into the electrical efficiency of your site and allowing for more detailed engagement, reporting and savings achievements to be made. TIER 1: involves installation of smart meters at each of your utility supply points. TIER 2: involves installation of smart meters at main supply points of production lines. TIER 3: involves installation of smart meters at a machine level.


Tier #1

We install smart meters at utility supply points, and this allows us to see the consumption patterns for the site. The benefits brought about by this tier are highlighted below.


​Platform Access:

​Every meter we install will send data to our live platform which you have access to, and you are able to view your consumption live from any device that has an internet browser, wherever you are.

Bill Reconciliation:

Because we are monitoring where the utility is supplying you from, we can check the bills you get monthly for correctness.

Predicted Billing:

Where you are billed in arrears, we can give you your predicted bills well in advance and this is helpful for budgeting purposes.

Tariff Evaluation:

We have extensive knowledge in tariff structures and with the consumption data of the whole site, we can establish the best tariff for you financially and work to get you onto this tariff.

Solar System Sizing:

With the site consumption patterns established, we can size solar systems for your site that will see the best financial returns.

Pattern Establishment:

After collecting enough data, we can pick up on trends in your consumption and could assist you with saving more. These trends include demand management and time of use shifting.


​Recent, and ongoing, wins we have managed to accomplish through out Tier 1 involvement include a tariff change at your Cape Town site where we are saving you 20% of your bill monthly, a solar system in Queenstown saving you R150k monthly on average and a reconciliation process carried out in Queenstown saving you and Crickley Dairy R700k over the last six months.


 

Tier #2

We install smart meters at the main supply points for your production processes and this allows for energy benchmarking against your production outputs. The steps in this process are outlined below.

​1

Identify processes that can be separated out based on the existing reticulation;

​2

Collect energy data for these process over a period. Our meters send data every half hour and so the period is dependent on the ease of collection and transfer of the production data;

​3

Collect production data for these process over the same period;

​4

Compare the energy used to the units produced during sections of this period. This could be every month, week, day or shift depending on the ease with which production data can be collected;

​5

Establish a benchmark that speaks to how many units of product you should be able to produce for every kWh of energy used on the production line;

​6

Monitor the production efficiencies against the established benchmark periodically;

  1. Where production happens and more units per kWh of energy are produced than the target, investigate what caused the more efficient run and try do this going forward;

  2. Where produced units per kWh are less than the target, establish the cause of inefficiency and avoid this happening in future production runs.


​We are currently benchmarking production at all three sites for preforms, bottles, cans and caps against each site’s historically achieved targets as well as against the other sites. Currently, Cape Town performs the most efficiently, followed by Middleburg and then Queenstown. We have found several factors affecting this including altitude, age of machinery and production volumes.


 

Tier #3

Metering at a machine level allow for a host of benefits. The machines that are monitored at this level need to be vital for the production processes, shared by different processes or general big energy users.

​Where production efficiency targets are not being met, machine-level monitoring helps to pinpoint what the cause of the inefficiency is. On many occasions we have been able to identify faulty machinery simply by looking at their load profiles and finding changes in behaviour or worse behaviour than similar machinery in the site or at other sites.

​We have been able to identify effects of altitude on compressor efficiency by comparing the amount of work the compressors at the different sites, which are at different altitudes, need to do.

​We have also been able to identify causes of demand spikes and action interventions that are targeted because we knew exactly which machinery was causing problems at the site.


​We currently have machine-level monitoring at your Middleburg and Queenstown sites. Both these sites have compressors and other items that are shared between processes. The machine-level monitoring has also helped with a financial feasibility for Queenstown where there are plans to install a new injector.


Screen Shot 2021-06-30 at 21.54.22.png