Solar Solutions from LessWatts

Value Proposition

Needs analyses plays an integral part of any solar system. Through our training at the Delft University of Technology, we obtained a unique approach to marry the required yield to the customer requirements. 

Done professionally and thoroughly, a solar plant will deliver free electricity for decades.  Proper needs analysis, energy profiling,   site constraint analysis and surveys are all extremely important aspects of a reliable solar solution. 

Too often we came across installations which was clearly adopted to the budget and as a result does not meet the customer requirements, or expected saving or filed within a short period of time. Although capital outlay is sometimes constrained, we offer alternative approaches to alleviate budget constraints to still ensure reliability. A properly designed and installed system is many time cheaper over time than a system where cost was kept low.

Grid-tie Solar System 

A Solar solution tied to the utility grid to augment the power supplied from the grid. The power from the sun is inverted to AC through the Grid-tie inverter where it is consumed as first priority. Any shortfall in solar power will be drawn from the grid. Where allowed, excess can be fed into the grid through mutual agreement between the customer and the regulatory entity.

Suited to customers with most of their electricity demand during daylight hours who would like to reduce their consumption from the grid.

  • Cost effective - This is the cheapest solar implementation
  • Easy to install
  • No Energy storage cost
  • No backup during power outages

Grid-tie Solar Schlematic

Hybrid Solar System

Where a Grid connection and Battery backup is available, and the energy sources (Grid and solar) can dynamically be utilised with focus on increased solar consumption. A hybrid system provides a cost effective solution where power outages need to be bridged.

Quality Hybrid inverters allows a range of settings to cater for consumer preference, eg. Battery Priority vs. Load priority and the self consumption of PV power through the use of available battery capacity.

  • Can help bridge power outages and load shedding
  • Increased self consumption to increase savings
  • Ability to allow non-essential loads to utilise PV power.
  • Basic energy arbitrage capability.
  • Greater cost
  • Requires more space to install

Off-grid Solar System

An off-grid solar system is not connected to a utility grid and normally requires the integration of a diesel generator. The total energy requirement needs to be supplied by the PV modules taking system losses into account. Evening energy requirements need to be addressed through stored energy from a battery.

Availabe in AC-coupled or DC-coupled architecture, the system can be optimised to minimise system losses as well as capital cost related to inverter size.

  • Save all electricity cost.
  • Long life-span - in excess of 20 years.
  • Dynamic smart control can be utilised to optimise system cost.
  • Requires more space to install, typically a dedicated room with adequate ventilation.
  • Costs more.

Energy Arbitrage

Energy Arbitrage is the shifting of load to cater for operational requirements. In most cases it is designed to save on electricity costs during times slots of increased price.

For commercial customers, properly designed systems can eliminate the cost for peak consumption periods completely.

Quality hybrid residential inverters offers a basic form of energy arbitrage.