Solar Hot Water Information for Architects & Specifiers

Find information here for the specification of Apricus solar hot water systems on individual residential homes.

Work through the selectors below to specify the best system.

Download building consent documentation, PS1 and complete Specification Guide at bottom of page for new builds.

Contact us to discuss solar hot water specification for multiple residential and commercial projects.

Contact us to discuss solar hot water specification
for multiple residential and commercial projects.

What system size to specify?

Use the sizing table below as a guide, contact us for an expert opinion if required.

chart showing specification for solar hot water supply

* Note: Apricus solar hot water systems will last at least fifteen to twenty years so please consider bedroom numbers & future changes in occupancy when specifying.

Download Apricus 20 tube collector specs here>
Download Apricus 30 tube collector specs here>

Does the collector need a pitched frame?

Apricus collectors come with a flat to roof frame. This is all that is required in most circumstances to ensure the collector is efficient yet unobtrusive when installed.

The minimum pitch for flat to roof installation is 18 degrees. Pitched frames are available to increase the collector angle when required. Click here to use the Frame Pitch Selector.

How is the collector frame fixed to the roof?

There is a mounting system for every roof type. Use the Mounting System Selector to choose the appropriate one for your roof design.

How will the solar system be plumbed?

There are three ways an Apricus collector can be plumbed – Open Loop, Closed Loop and Drain Back.

Apricus evacuated tube collectors are appropriate for every climate zone and water quality in New Zealand. The collectors are unique in the flexibility of three different plumbing methods, meeting the requirements of any situation.

In most locations, the systems are installed Open Loop – using potable water from the cylinder directly in the collector, with no need for heat exchangers or coils in the cylinder.

In some very cold or poor water quality areas, the collectors can be plumbed as Closed Loop or Drain Back.

Use the System Type Selector to choose the appropriate method for your design.

What is an indicative cost for a solar hot water system?

cost of solar hot water systems diagram

All systems above assume flat to roof installation and include all standard installation materials (pump, controller, pipe, insulation, valves, etc). Contact us for cost guidance for other options, i.e. pitched frames, two storey installations, etc.

What hot water cylinder should I specify?

Stainless steel hot water cylinders should be specified with solar hot water systems to allow water storage at higher temperatures, storing more solar energy.  For any cylinders over 250L twin elements allow for greater flexibility in electrical boosting and therefore greater savings.