You should be able to answer the following questions:
- Is the supplier and or installer listed with SESSA?
- Is the SWH system a SABS tested and passed system or SABS Mark system?
- Are you prepared to have a tank on the roof?
- What size of system do you require?
- What is the efficiency of the system?
- What are the likely daily kWh savings?
- What does the system cost?
- What is the payback period?