Thought I would post this frustration here - It might help someone in their decision making and or might help me if anyone has better luck/advice or or a completely different experience.
See Photos Below (I have not yet contacted the supplier - its the weekend, so out of fairness I wont mention names).
We installed these Vacuum Tube Solar Geysers just over 2-years ago. To be honest - they are extremely efficient and work extremely well - even in very little sun heat. I often boasted that these geysers were in fact the best part of my solar system (not the PV).
I installed 2 x 250lt Vacuum Tube Solar Geysers in series (total of 500lt of hot water), that would supply my whole house. (cost installed was R30k) I worked out that my payback period would be about 4-years (If nothing broke - which is now the case). I installed them in series so that the one could feed the one that was being drained with hot water, and so that we could have plenty of hot water even for the next morning.
This worked well for almost 2-years (the one being drained also had a backup heating element for colder days).
what i Learnt was that they leaked from the get-go. Initially this wasn’t much of a problem, but the leaking got progressively worse, until the geysers leaked so much that in winter, they would not hold sufficient enough heat to have a shower in the morning (or even in the evening on colder days). All the heated water kept leaking out. This has also rusted my tin roof quite a bit too. They leaked in multiple places - specifically inlet and outlet joins.
Has any one had a similar frustration/experience - or are mine just duds?
In my opinion these are very cheaply Chinese made units - sold very expensively here in SA. do your homework carefully if you are considering these.