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Category: Residential solar solutions

.3.18 kWp Pezula Private Estate Grid-tied with backup with a lithium iron phosphate battery

Another Grid-tied solar system supplied and installed by Specialized Solar Systems using a lithium iron phosphate battery for PV generated energy storage. 

Place: Pezula Private Estate

Installation time: 3 days

This solar system was made up of the following components supplied and installed by Specialized Solar Systems:

  • 3 x 3kw Victron Multiplus inverters
  • 1 x 10kW/7kW Usable high power Freedom Won HP Lithium battery
  • 1 x 5kW Fronius Inverter
  • 12 x 265watt Solar PV modules
  • 1 x Victron Color control GX

About Grid-Tied Solar Systems
Grid-tied also be known as on-grid, utility-interactive and grid back feeding are all terms used to describe the same concept: a solar system that is connected to the utility electric power grid.

Advantages of Grid-Tied Systems

  • A grid-connection will allow you to save more money with solar panels through better efficiency rates and lower equipment and installation costs. Batteries and other stand-alone equipment are required for a fully functional off-grid solar system. This adds to costs as well as maintenance. Grid-tied solar systems are generally much cheaper and also simpler to install.
  • Homeowners can also put excess electricity back onto the utility grid instead of storing it themselves with batteries. This is done with special meters (if allowed in your area).

The utility grid is a virtual battery
Electricity should be used as it is generated. However, it can be temporarily stored as other forms of energy (e.g. chemical energy in batteries).  Energy storage typically comes with significant costs.

The electric power grid is in many ways also a battery, without the need for maintenance or replacements, and with much better efficiency rates. In other words, more electricity (and more money) goes to waste with conventional battery systems.

Additional perks of being grid-tied include access to backup power from the utility grid in case extra power is required or if your solar system stops generating electricity for any reason.  At the same time, you also help to mitigate the utility’s peak load.

Please contact Specialized Solar Systems for more information on Grid-Tied solar systems.

An editorial about SSS’s mission of becoming the Electricity utility provider for disconnected rural communities all over South Africa recently published on the Victron Energy blog site

To view this article at Victron Energy website

Grid Support, The Wilderness


This houses electrical system runs  with solar primarily supplying the system with 9kW/hours per day. In simple terms they have 10kWhrs  per day via solar and wind input,  if the battery levels start to run low a 5kW Victron inverter will switch over to Eskom power before the batteries lifespan can be affected.

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36-48KWH/day Off-grid installation

36-48KWH/day Off-grid installation – Deep in the Baviaan’s Klein Karoo

Another off-grid solar system supplied and installed by Specialized Solar Systems using a lithium iron phosphate battery for PV generated energy storage. The off-grid solar system was designed to supply 36-48KWH/day with 10kVA peak draw.

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Short video of a recent 42kWh per day residential Off-Grid solar energy system installation completed in Wilderness

The Victron powered off-grid installation consisted of the following components:

  • 2 x Victron Smart Solar 150/85-TR MPPT
  • 1 x 15kVA Victron inverter|charger|controller
  • 7.95 kWp (30 X 265W) PV Solar panels array delivering an average of 42kWh per day
  • 48 x 2V Mil lead acid storage cells in crates with additional water, self-watering maintenance system and control book (47kWh usable at 30% DOD). Total of 159 360kWh.
  • Victron CGX Color Control with battery monitor and Wi-Fi dongle for remote management
  • 1 x Wi-Fi router for GPRS communication
  • Junction box, cables and surge protection for both AC and DC lines
  • Interconnecting cable between energy system and house distribution box (CAROX 15m 3 core steel)
  • Installation of the complete system including single line diagrams, commissioning and COC

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