Please note: We are temporarily in maintenance mode, and some features, such as Buy&Sell, Forums and Messaging are temporarily offline. Back soon!

Forums > General Discussion   Shooting the breeze...

Brains Trust Q: best solar hot water system?

Reply
Created by GPA > 9 months ago, 19 Apr 2014
dinsdale
WA, 1227 posts
6 May 2014 3:23PM
Thumbs Up

Select to expand quote
myusernam said..
I think the best $ wise setup more solar panels on the feed in tarrif (oversize into your inverter)

I've been looking at adding more panels. What do you mean by this? (genuine question)

gs12
WA, 421 posts
6 May 2014 8:42PM
Thumbs Up

Select to expand quote
Paradox said..

only downside is the noise - about a modern split aircon level. So don't get one if you can't place it where it won't annoy you.


yep, you definitely don't want this next to your bedroom window. you can buy "sound reduction hood" from Stiebel. I made my own from plywood and acoustic foam as the Stiebel hood was too pricey for my liking and for what it is. Works great, it really filters out the sound.

Buster fin
WA, 2597 posts
6 May 2014 8:45PM
Thumbs Up

Cleaned my solar panels this arvo. The hot water ones have developed a leak of sorts I think. Time to check my warranty papers!

rodriego
WA, 20 posts
7 May 2014 3:56AM
Thumbs Up

Select to expand quote
Aabae said...
I installed a 350 Lt heat transfer stainless steel solar hot water system with 30 evacuated tubes from Sunergy last September, the system is fantastic except when it boils for an hour or so during the early afternoon, it sounds like there is a storm outside.
These systems don't use the water in the storage tank, it only uses it to heat the fresh water being passed through it, I have never switched the heating element on yet and going on its performance during overcast or rainy days, I doubt if I ever will need to use it.
I'm a shift worker, so I am always the last to have a shower out of a family of four females and myself, doesn't matter what time of the morning I get home, the waters always hot.
This is my first solar hot water system, I'm stoked, but kicking myself for wasting money buying gas for the last 26 years.
There are quite a few of these type of systems on Ebay, for me the main thing is that it's a heat transfer system with evacuated tubes.



That sounds like a good system.Did it cost much more then normal solar?

myusernam
QLD, 6154 posts
7 May 2014 9:47AM
Thumbs Up

Select to expand quote
dinsdale said..

myusernam said..
I think the best $ wise setup more solar panels on the feed in tarrif (oversize into your inverter)

I've been looking at adding more panels. What do you mean by this? (genuine question)



even if your inverter is xkw, doesn't mean you have to have x kw of panels. the inverter has a max v input. dont exceed that and you're apples.
eg, in qld we are limited to 5kw feed in. I have 8kw panels going into a 5kw inverter. in full sun the inverter clips. but on a sunny day I am hitting 5kw at 930 am and staying there to 3.30pm. (whereas 5kw of panels might mean I only just hit 5kw if the sun is directly overhead)
there are many factors like roof tilt, shade, cloud etc that detract from your panels output. more panels means more chance of maximising your inverter and your generous feed in rate (if hooked up) if you have extra it just clips .
I can produce over 45kw a day, which is $20. If conditions aren't ideal, you still put out much better figures. You can even put 10kw into a 5kw inverter. (you have to have the panels set up right, and certain inverters have more favourable specs) Known as overclocking in some circles. does not void warranty of inverter, as inputs are max v. Taken to the extremes, your inverter output resembles more of a square curve than a bell curve. I generate approx 5000 dollars a year worth of power

In any case, in my situation i sell power at 44 cents and my conventional HWS connected to a tarrif is 13 cents an hour.

teatrea
QLD, 4177 posts
7 May 2014 6:38PM
Thumbs Up

The real secret is to just use less

HG02
VIC, 5814 posts
11 May 2014 12:27AM
Thumbs Up

That might work in QLD but here in (Mexicanville) Vic they just you charge $$$ any way
Best Solar pool heat Iv had was a coil of black poly pipe Teed into my pool pump return line with a gate value to reduce and redirect the flow up to the black poly on the roof and return to the pool would heat 24000 gallons in 3 days first warm days of spring
Been thinking of making one for the boat and run a PC water cooling pump into a 20 liter insulated container just for when you need shower for when I get up north



Subscribe
Reply

Forums > General Discussion   Shooting the breeze...


"Brains Trust Q: best solar hot water system?" started by GPA