A twenty tube system is quite modest really. Does this include VAT? If you do it this way, you won't be eligible for the SEAI grant, so you might get a cheap system, but you have no comeback on the installer (who may point the finger at the hardware if something goes wrong).
Generally, where a solar hot water system has failed, it has almost always been an installer issue where the installer didn't understand the particular system.
There are companies offering 20 tube systems installed which will cost €2500 after the grant has been refunded. (for example , but there are others if you look around).
Personally I would look to a professional installer who has done the SEAI training and is subject to the warranty imposed by SEAI rather than do a mix-and-match. The only reason to buy hardware separately is if you understand the systems yourself and want to self-install - then you can save a few bob.
With the risk of offending some people here, the following has been my experience, which has cost me money. I am not a technical guy qualified in this area, only what experience has taught me.
In my experience an SEAI approved installer or supplier for that matter doesn't matter a hill of beans. Once someone goes off and does a day's course they are approved, SEAI says all is ok. When it comes to solar heating, you get what you pay for. Compare the output (all systems are measured against a standard) between the various suppliers and it is pretty eye opening, the variations are massive. In my experience there are only a couple of systems with high output and they are the more expensive options. I now have tubes and while very happy with them and the performance, I do query the payback. Obviously hitting high temps these days. Did you not consider looking at pv electric panels and connect into your DHW cylinder? Just a thought, but I don't know much about pv systems. all the best.
so if 20 tubes is not enough does this mean defaulting to 40?
thanks
R
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