Demand Billing is often adopted by large scale energy users, over 1MW per year consumption. In simple terms it is buying power at a fixed cost for a period of 5 years (time frame can vary). The confusing part is that the bills reflect kWHrs used which varies and kVA Annual Demand Blocks which are fixed.
The bill generally comprises of Energy Charges, Network Charges – charged in kWHrs and Annual Demand in kVA blocks, other incidental charges are also included which are charged in kWHrs.
So the question is “How does a solar system affect the bill?”
The Energy Charges and Network Charges are directly affected by the number of kWHrs consumed in a period, normally 31 days. Therefore, as a solar system reduces power consumed off the grid these charges are affected. The actual kWHr charge for these are generally very low, around 8.6Cents for Network Charges and 4.4Cents for Network Charges.
It is fair to say that the charges which are charged by kWHrs is approximately 13Cents/kWHr.
The Annual Demand is NOT directly affected as it is a FIXED price agreement with the energy retailer. However, if energy reduction solutions are adopted i.e.: The customer can request a review of their energy consumption and have the Annual Demand lowered creating substantial savings.
It is recommended that the energy saving solutions be adopted first then reviewed so that SA Power Networks can review actual data and not estimate. The review can occur at any time, at the customer’s request, and whilst a review can be done many times it is best to keep them to once a year if possible.
With this in mind and the cost of energy saving solutions an Evergreen Energy Plan is the perfect place to start because the capital outlay is “ZERO” and the savings can be attained from the on-set. Then with an Evergreen Energy Saving Solution Plan (EESSP) put into place the savings can increase substantially over a short period of time. The savings can be in the thousands…
An EESSP includes the energy saving solutions listed above plus monitoring and review windows.