Skip to main content
Energen Hybrid Systems
  • Site Evaluation
  • System Design
  • Supply & Installation
  • Commissioning
  • Servicing & Maintenance

System Design

Energen systems are designed around the daily load, differential temperature required, peak load, time between peaks, area available for collectors, storage tanks, heat pumps and other typical site conditions and requirements.

Energens solar hybrid system is a combination of twin coiled enamelled storage tanks (suitable storage device), high efficiency EHS P collectors, high efficiency heat pumps, closed circuit circulation systems, solar and heat pump controllers.

Why Energen?


New Generation Closed Circuit System:
The system design is a new generation fully closed circuit system. The collectors and the heat pumps are not exposed to the vagaries of the potable water conditions because no water flows through the collectors or the heat exchanger in a heat pump. The collectors and the bottom coil in the tank form a closed circuit on one side, the heat pump and the top coil forms a closed circuit on the other side. Only closed circuit liquid flows through the collectors and the heat pump. There is no scaling, reduction in performance, requirement of regular de-scaling or regular downtime for repair. This not only ensures long life but also a reliable hot water supply with peak performance year on year.

Energen Product Features and Benefits


  • No scaling, no reduction in performance, minimal maintenance & constant high performance
  • Very low operating and running cost
  • Reduced storage, reduced space, reduced cost, adequate recovery from heat pumps, heat pumps also run at night with same efficiency
  • Excellent corrosion protection with a pressure rating of 10 Bar
  • Maximize solar gain and limit the heat pump input as per the daily requirement on demand
  • Provides good insulation with very low heat loss
  • Added corrosion protection
  • Cold Inlet, hot outlet, return line, solar supply and return, heat pump supply and return and heating element as standard
  • Maximize solar gain & limit the heat pump operation for the required boost optimising overall efficiency
  • High efficiency absorber with free flowing harp array for lower pressure drop across the manifolds.
  • High absorptive capacity of 96% with low emissivity, better performance and a lower number of collectors required
  • 93% transmittance, low heat absorption and high strength
  • Corrosion resistant with strength
  • Safety against over- heating, fill & drain plugs, flow gauge and air separator
  • High energy efficiency with COP of 4+, precise control of temperature & energy saving
  • Ensures total protection against over temperature and pressure. Works on mains pressure
  • Allows for close circuit fluid expansion and contraction without putting strain on the system line
  • Anti corrosive, safe, antifreeze with excellent heat transfer properties
  • System can be upgraded or capacity expanded to meet any future increase in demand
  • Tailor made to suit the requirement, space availability and budget
  • Excellent customer support and after sales service
  • Low life cycle cost and excellent value for money ensuring customer satisfaction


  • New generation fully closed circuit system
  • System efficiency of > 85%
  • Storage for peak demand with full recovery between peaks
  • Double enamel coated steel tank for hot water storage
  • Twin coil design with bottom coil for solar and top coil for heat pump
  • CFC free PUF insulation for the Tank
  • Magnesium sacrificial anode
  • Process ports for all requirements
  • Sensor ports at bottom & mid portion
  • BlueTec collectors with solar keymark
  • Sputtered Titanium Oxide coating on a flat plate Aluminium absorber
  • Prismatic, low iron toughened glass
  • Aluminium frame collectors
  • Pre-assembled pump station with integrated solar controller
  • Heat pump as booster and alternative energy source
  • Close vented system with temperature and pressure relief valves on the cold inlet and hot outlet
  • Diaphragm type expansion tanks
  • Food grade Polypropylene closed circuit heat transfer fluid
  • Modular design
  • Design flexibility options
  • Product warranty for 3 years covering parts & labour
  • Product life span of over 15 years