Solar vs Heat Pump?

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Justin
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Solar vs Heat Pump?

Post by Justin » Thu Jul 10, 2014 4:27 pm

I need to replace my solar panel for my house.

If anyone has any insight into 'solar panel' vs 'heat pump' for household purposes I'd love to hear it.
Thanks
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DavidWade
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Re: Solar vs Heat Pump?

Post by DavidWade » Thu Jul 10, 2014 5:05 pm

I also want to know what is better & installation cost comparison

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henkg
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Re: Solar vs Heat Pump?

Post by henkg » Thu Jul 10, 2014 5:40 pm

Justin, STH Solar in Montague can give good advice. Their principal has done a lot ito energy efficiency on the guano caves property he owns/used to own.

If you do go the heat pump route, consider using the cold exhaust as an air conditioner. A heat pump is a sort of air conditioner in reverse.
You may still be here tomorrow, but your dreams may not. Cat Stevens

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Justin
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Re: Solar vs Heat Pump?

Post by Justin » Thu Jul 10, 2014 9:18 pm

Background:
I had a solar system.
The panel now needs to be replaced (pipe blew in the recent cold).
Phoned insurance and they sent a plumber/supplier around to assess.
Supplier is recommending a new solar panel.

I am very open to purchasing a new geyser as the Municipality has from time to time pumped sludge from the local damn into the water system.
The water in the house has a nasty chemical smell (I don't know the cause). I also pumped out some nasty brown sludge from my existing geyser (and this makes me want a new geyser as well) + there is a lot of oxidation on the copper piping.

In the mean time I have established that a heat pump requires good quality water as any sediment will cause problems on a heat pump.
As above I will not be getting a heat pump.
Click here for more info on Solar water heaters VS heat pumps here

I now have the choice of a new panel (hooked up to my existing geyser) or a complete new system.

I have not looked far, but have good experience with Solarhart products, so I'm considering one of these panels 300L
--> http://www.solahart.co.za/Productsinfo/ ... fault.aspx
I'll post prices when I get them.

The supplier tells me that Eskom is no longer giving rebates on solar installations - can anyone confirm?

- Thanks Henk, I'll give them a call. The insurer has already appointed a plumber/supplier so I'll work with them for the moment.
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ziggx
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Re: Solar vs Heat Pump?

Post by ziggx » Fri Jul 11, 2014 3:26 pm

The no longer rebate thing sounds like total bs to me.

All geysers have sediment lying on the bottom layer but as the hot water exits from the top it is not a cause for concern.
Copper pipes generally dont oxidise from the outside enough to ever fail.

I think your plumber just might be leading you down the garden path ?
It might be time to get a second opinion .

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Re: Solar vs Heat Pump?

Post by DavidWade » Fri Jul 11, 2014 9:14 pm

Since we are on the topic of piping, the company I work for can reline and repair leaking and damaged pipes with out having to chop open walls and floor slabs and replace them. We reline working from existing access points and give a 10 year warrantee on the lining.

Here's how it works:
https://m.youtube.com/watch?v=n20NRgmDcHc

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Re: Solar vs Heat Pump?

Post by GeorgeHorn » Mon Jul 21, 2014 5:37 pm

I chose a heat pump because my roof is not north facing and I have lots of trees creating shade. Apparently heat pumps are much more effective in winter than solar. See the graph below showing energy saving using heat pump.
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heat_pump_savings_graph_01.jpg
heat_pump_savings_graph_01.jpg (42.04 KiB) Viewed 3123 times

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Justin
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Re: Solar vs Heat Pump?

Post by Justin » Mon Jul 21, 2014 9:11 pm

So in the end we went for an external, high pressure, solar panel with new geyser (our old one was blown) on the outside.
The brand is Noble (made in Greece). The interior of the geyser is ceramic and the geyser apparently well insulated.
The system relies on Eskom power for extra heat during the winter (naturally this is on a timer).

The choice of going solar was easy for us, since the weather in Montagu is most often sunny.
The Eskom rebates are still very much available (although heat pump rebates have recently come to an end).

The sediment in our old tank was over and above the norm (the municipality let the damn that they were pumping from (from the bottom) run dry a few times) - see below (this was the cleaner water that came out!!)

The 2nd pic down is the solar panel without the Geyser.
The 3rd pic down is the geyser going on (fyi: The Montagu Webcam is behind the satellite dish :thumleft: and the dirty patch is where the old panel used to be (we moved if for easier installation of piping).
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geyser_dirty_water.jpg
Dirty Water from Geyser
geyser_dirty_water.jpg (93.09 KiB) Viewed 3176 times
noble_solar_heating_01.jpg
Noble Solar Water Heating System
noble_solar_heating_01.jpg (111.66 KiB) Viewed 3176 times
noble_solar_heating_02.jpg
Noble Solar Water Heating System
noble_solar_heating_02.jpg (155.66 KiB) Viewed 3176 times
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