I have sent you a quote for retrofitting all nine geysers. I have allowed for a single solar collector panel for each of the seven 150 lt geysers and three collector panels for each of the 450 lt geysers. Each geyser is fitted with its own circulation pump and controller.
There are a couple of variables and a site visit will be required to confirm the viability of solar heating for each of the locations.
I would also like to discuss the actual usage of hot water in a little more detail to ensure that we are looking at the correct options. The solar option that I have quoted on is based on “normal” household consumption. Your consumption may be considerably different and there are other options available for higher demand usage e.g. heat-pumps which can deliver the same heat output as an electrical element at about 25% of the electrical consumption.
It would be helpful if you could give me some idea of average water consumption per person, such as how many people take showers at work, how many shower at each station and if they work shifts etc. Perhaps we should schedule a discussion with someone who has these figures and other operational details at their fingertips.
Looking forward to your response.