Solar Commercial Systems


Exon Consulting are a specialist Commercial Solar PV company and focus on Roof-Top PV systems ranging from 10kWp to 999kWp that will either Reverse Council Meters (Nett-Metering) or will supply the buildings electrical load as an optimised “Self-Consumption” supply model.

Grid-Tied Systems

Exon consulting are experienced Grid-Tied systems installers. A grid-tied electrical system, also called tied to grid or grid tie system, is a semi-autonomous electrical generation or grid energy storage system which links to the mains to feed excess capacity back to the local mains electrical grid. When insufficient electricity is generated, or the batteries are not fully charged, electricity drawn from the mains grid can make up the shortfall.

These systems can be used in the following building types from large Commercial buildings to Residential to large Industrial complexes.



Grid-tied PV systems typically consist of PV modules connected in series to string inverters that convert DC power to AC power, which is then fed directly to the grid. As a building receives this AC energy, it is distributed to appliances and lighting, or other devices where needed.

Any energy that exceeds the regular building usage goes back to the grid. In some cases, the utility issues a credit to the next bill.
Solar PV (photovoltaic) roof-top, Grid-Tied systems are the most common type of solar PV installation around the world (93% of all PV systems are grid-tied). These systems do not store their energy in battery banks.

Electricity produced during the daytime by the sun is either used in the dwelling/building or directed back into the electricity grid, this puts your power usage into credit (i.e. Nett-Zero Energy Building).

These Roof-Top systems can either Reverse the utilitymeter or are designed for close to 100% Self-Consumption usage.

Grid-Tied systems effectivley reduce or eliminate the KWh portion of the electricity bill, thereby reducing or eliminating this cost.

Typical Day-Time load type buildings (i.e. operate during day-time hours 7am to 6pm) can be reduced to Nett-Zero energy from the grid (eskom) while oher building types may only achive portional savings (10% to 90%), this being known as a Self-Consumption approach

The initial cost in Investing in this Technology is typically offset within a few years and the long term savings (30+ years) can be significant, with IRR’s 15% to 70%.

Exon consulting are experienced Grid-interactive systems installers. Grid Interactive systems are based on their grid-tied and off-grid counterparts. Like the inverter in grid-tied systems, the inverter in a grid-interactive system can convert solar-generated DC power into AC power that is then fed directly to the grid.

In a grid-interactive system, however, the inverter has multiple additional functions to perform. Under normal conditions, the inverter maintains the battery in a state of full charge in preparation for use during power outages. When the grid goes down, the grid-interactive inverter seamlessly steps in to invert DC power from both the solar and battery sources into useable AC power to run selected loads.

The system will charge those batteries during the day from the panels or as required from a generator, or both. The grid-interactive inverter can automatically control the generator to run only when required to recharge the batteries, greatly reducing the generator’s run time, noise output and fuel consumption.

Additionally, a user can maximize energy savings via peak shaving by taking advantage of using stored energy to offset utility prices when rates are highest and, in turn, only choose to leverage the grid when pricing is most advantageous.

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