PowerOptimal Elon 100 Case Studies

Solar PV array size: 1.575 kWp         Family size: 4 people          Solar Fraction achieved: 52% of energy from the sun

When & Where: Pretoria, May 2017 (Winter)

Comments: Despite the solar PV array being much smaller than the recommended 2.5 kWp for four people, over 50% of the family’s water heating energy was obtained from the sun.

Solar PV array size: 1.5 kWp         Family size: 2 people          Solar Fraction achieved: 65% of energy from the sun

When & Where: Johannesburg, November to December 2017 (Summer)

Comments: Approximately two-thirds of this family’s water heating energy need was obtained from the sun.

The size of the solar PV array (in other words, the number of solar PV modules on the roof) will directly impact the performance of the Elon 100. Additionally, time of year and location will also have a substantial impact on system performance. Click here for a PDF with more information.

As can be seen from the graph below, payback period decreases as number of solar panels increases, and is also different for Johannesburg, Cape Town and Durban [1].

The reason that payback period improves (decreases) as number of solar panels increases, is because there are some fixed costs (such as engineering design & safety components) and some costs that do not scale linearly with array size (such as labour, wiring, mounting kit costs, etc.).

 

 

[1] Calculations based on actual Elon performance, assuming a 20% reduction due to non-optimal user behaviour, an initial electricity tariff of R2/kWh and an annual electricity price increase of 8%.

 

 

 

 

PowerGuard Case Studies

Here are some examples of what has been achieved with existing commercial and residential PowerGuard® installations:

PEAK DEMAND MANAGEMENT

THE COST SAVING POWER OF POWERGUARD®

This technical white paper provides detailed information on the functioning of
PowerOptimal’s PowerGuard® peak demand management technology.

Example of immediate peak demand reduction on installation of PowerGuard® in a hotel.

Impact of PowerGuard® on monthly peak demand in another hotel.

 Domestic PowerGuard® installations

Over 40% reduction in peak power demand at a home fitted with Powerguard