Solar HWS not approved due to direction in Queensland
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Plumbing inspector is refusing to approve the installation as he says the collector should face north even though there is no space for it.
Under Queensland law (as far as I can see) there is no requirement to have an energy efficient hot water system so we could install a plain old electric system and it would be approved but because we have gone solar the inspector says no (even though Rheem states that the system will still generate 90% of the hot water that it would if installed as per the recommended orientation).
Has anyone else come across this and is there any way around it short of pulling the efficient solar system off the roof and putting a crappy electric one in instead??? Bureaucracy gone mad?
How could there be no space for the collector? Surely a frame or something could be set up? Pics please?
At the moment the current solution is for the plumber to remove the panels from the roof and store them in the garage, convert the system to electric only (luckily the system we have will allow for this), get the final inspection and then put the panels back on the roof and switch it back to solar. Complete waste of time and money but the inspector can't fail it if the panels are not on the roof. Total f****n madness.
. Will look very ugly! Yes they could potentially mount in on a frame over unit 2 but that adds a lot more to the cost than what you will ever get back from the slight improvement in efficiency
I think its more than a slight efficiency over using grid electricity only. A mate has one and swears by the amount of money it saves him. Of course if you have solar panels then perhaps the efficiency may not be so much greater by virute of rebates you might be making feeding back to the grid.
"Rheem states that the system will still generate 90% of the hot water that it would if installed as per the recommended orientation)"
Lol they'll say anything to sell you something. That is just plain garbage for Qld. People wouldnt be paying $6000+ to install them just to save a piddly 10%.
No I was saying that in Queensland a solar HWS installed facing due west will be around 90% of the efficiency of one facing NE or NW (as allowed by the guidelines) BUT most systems in QLD will produce more hot water than what is used for most of the time so it is only of benefit to have it facing north for those marginal days. The system on our own home is installed outside the new guidelines and we have to turn the boost on maybe 10 days per year. If we had put a frame on it to get it to the correct orientation it would have cost an extra $1000 (roughly) and maybe saved us 2-3 days of boosting. As plumber said at the time you would never save the extra $1000 to pay for the frame.
Same with the duplex - the cost of adding the frame is a lot of money and is totally unnecessary except for this stupid law. The west facing system would be fine for the purpose and would save a lot of money over NOT having a solar system at all which is what the law is causing. Also a system on a frame in a cyclone area (which we are borderline on) is much more likely to come off the roof in a cyclone so again for a small increase in efficiency they are potentially creating a safety issue.
Essentially if we were allowed to connect it then it would probably save the tenant at least 95% off the hot water cost even with the west facing panel. Really just cannot understand why this has to be a rule with no exceptions instead of just a guideline that can be ignored if it makes sense to do so.
Does anyone have access to the old Standard? I have forum searched for a reference on H1 and Whirlpool without luck.
Australian Standards are Deemed To Satisfy (DTS) solutions. Did the plumbing inspector make any references to Performance Solutions or did he ONLY refer to having to meet Australian Standards (DTS)?
Google: NCC 2016 A PERFORMANCE BASED CODE
When I have more time this evening I will put a post on Whirlpool and see if someone there has any advice.
http://abcb.gov.au/NCC/How-it-works
And posted separately below...
http://abcb.gov.au/Resources/Videos/NCC-Meeting-the-Performance-Requirements
http://abcb.gov.au/Resources/Videos/NCC-Developing-Performance-Solutions
The current NCC 2016 can be downloaded free of charge and you can check this. The installer should have known if this is in fact the case but removing the option to use a Performance Solution goes against the ethos of the NCC and reeks of bureaucratic arrogance and mismanagement.
Builders are using more and more Performance Solutions and I have been critical of many that have been surreptitiously introduced to save costs and favour some questionable work practices and difficulty of scrutiny but deleting the option of being able to certify a Performance Solution to allow a solution to a difficult problem while still meeting the performance requirements of the NCC goes against the ethos of the NCC.
It is a requirement of the NCC that a Performance Solution be judged on its merits by documented expert assessment, it is bureaucratic incompetence if this has been denied you. Having said that, a State can (I think) still choose not to adopt the PCA in its entirety as was the case until recently with West Australia.
I will look through the PCA later today and post what I find.
I don't have AS/NZS 3500.4 unfortunately and buying it would probably cost over $200. The inspector will have it.
EDIT 28/12/2018.
The linked article below cites the industry disbelief and outrage to this madness.
https://reneweconomy.com.au/sudden-biza ... try-13565/
A solar system in Queensland only loses marginal performance by being outside ideal azimuth and orientation. And west north west is actually probably better for solar hot water because it's heating the water with the afternoon sun for the evening when you use most of your hot water...
A little bit of knowledge can be dangerous with some people.
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