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Louw

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Louw last won the day on October 19 2016

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About Louw

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    Durbanville

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  1. Water harvesting and use, same logic as solar systems.

    I think the move is back to the reuse/recycle - 20 years ago everything was packed in plastic that went to the dump site. These days everyone tries to recycle
  2. Water harvesting and use, same logic as solar systems.

    @plonkster As long as you don't waste the flush water - Unfortunately most/all of the RO I have seen has been installed with the flush water going down the drain!
  3. Water harvesting and use, same logic as solar systems.

    I am hearing of more and more people taking their water bottles to go and fill it at the "Water shop" around the corner or installing water filtration systems to ensure clean water. Just some information on that. Most of the water from the Water shop comes from Reverse Osmosis. Similar to your under counter filter. For every 1 litres of Clean water, 4 litres of clean water is used to flush the RO membrane. Or 80% wastage, down the drain!!!! So a 5lt water bottle uses 25lt of perfectly drinkable water. People needs to be educated!!!!
  4. Water harvesting and use, same logic as solar systems.

    @plonkster Have you taken into account the impact of Ozone on rubber? Somebody advised me that Ozone will damage any rubber downstream. His advise was that after Ozone treatment you have to treat the water with something else to neutralize the impact of the Ozone to ensure it does not damage your rubber downstream.
  5. Water harvesting and use, same logic as solar systems.

    Thanks for the feedback I had my water tested. My issue is Fe - 4.3. Above 0.3 causes stains. Above 2 clogs RO machines Quotes I am getting is around R30k+ to remove the Iron. I am not to comfortable with that, so testing what I read on the Internet: aeration and filtration.
  6. Water harvesting and use, same logic as solar systems.

    @plonkster Can you please give a description of your "Pretty Basic Water practises" I am currently working on a system to use my borehole water in the house. My problem is also Iron Currently my plan is as follows: (First 2 steps in already in place for Garden) - Water from borehole into 4,500lt tank, allowing the water to air - Filter through the following before going into second tank (65 micron Disk Filter, 20 micro Big Blue, 10 Micro Big Blue) (This makes a big difference as the filter clog up from Iron, so you can see it working) Plan for the weekend - Second tank will be a 950lt tank, which is circulated through a 3 bag swimming pool sand filter. Water is pumped in such a way that it drops into the tank ensuring more aeration of the water (Using a 450w pump, running from solar). UV light installed inside the tank to kill all the harmful stuff. - Filter water through 1 micron, 0.1 micron and carbon filter before going into the house. Drinking water will be CoCT water. I have already played around with the sand filter and it makes a difference on the clarity of the water. Any suggestions??
  7. Water filtering

    I also received a nasty letter from CoCT a month ago for my wife's dental practise (Trading from Residentially zone property). 2 Weeks ago I linked the toilet (8lt) of the dental practise (3 staff) and the toilet (13lt) from accounting firm (5 staff) next door up to a wellpoint. I put a water meter in because I like stats. Got a fright of my life after the first week. On average 250lt being used per day just to flush the 2 toilets! Saving 5kl per month!
  8. Solar water heating is dead?

    I have looked into possibility of running a heat pump from PV for extra heat on the days that the sun shines (Give PV power) but not hot enough to heat the geyser through EV tubes to 55C. Taking into account that a Heatpump cost R10k and upwards it almost seems more viable to spend the R10k on another 1KW of Panels, change the element to a 1.5kw one and run it directly from PV. You can then use the PV power in summer (when EV is enough) to run other things like swimming pool pump/borehole pump.
  9. Victron CCGX

    Thanks Guy @plonkster interesting that you can't do it with their biggest MPPT's ghatikar - I had a similar idea - Control one of the PV strings with a Relay that switches on when the pump starts. Put then I will only use the Panels when the pump is running whereas currently I have overspec my Panels to allow for the overcast day's and was planning to only run the pool pump on sunny days where I have excess PV power. Currently my best value for money idea is just to double my battery capacity when I have to replace my batteries. Current price are R9,400 for 4 additional T105 vs R7,800 for a CCGX (without cables). 450Ah will allow me to charge at almost 70A which is more than enough to run a 750W Pool pump or 1.1kw Borehole pump (Not at the same time) without drawing from the batteries. And then I get the additional benefit of doubling my storage capacity
  10. Victron CCGX

    HI All I currently have a Victron 150/70 charging 4 x T105 (225Ah; 24V). I limited the charge current to 33A to ensure I don't overcharge my batteries. Taking into account that the inverter use 2A and base load is around 4A I am around 27A maximum charge of my batteries. I am looking into adding my pool pump/borehole pump to solar as well. The problem is that at 750W the pool pump draws 30A Plus, thus drawing power from the batteries. So I am looking for a solutions to increase my charging from my MPPT during these times. Will a Victron CCGX linking the MPPT to my BMV-700 be able to do this (Taking into account that I have VERY LIMITED to NO programming abilities). Or does anyone else have ideas? Regards,
  11. Cape Town Water Crisis

    Rainfall varied a lot through the night. The following from mine and other family Members all in a 5km radius Durbanville Hills: 14mm Eversdal Heights: 17mm Eversdal: 35mm Eversdal: 51mm The figures reported is from North to South so rainfall further south might have been more.
  12. Geysers in Series

    Another Benefit: 2 Geyser = 2 Elements You can change the "cold" geysers element to a 1.5KW element, and link it onto your inverter, and control it with a Relay from your BMV/Charger. When your BMV gets to 100% or your charger goes to Float it switches on.. Result - You dump your excess electricity generation in your geyser. Still having the second "warm" geyser on Eskom.
  13. Geysers in Series

    My brother installed 2 x 200l Geyser in Series. Both have their own 20 EV Tubes connected to it running from 2 Geyserwise. Works perfect. The water entering the second geyser is already warmer so it does heat quicker by EV or element. You also don't need 400lt at 55C, Only 200lt at 55C. Reducing heat loss. Benefit of 2 geyser is that you can set different temps and can change them through the year. ie. In summer you drop the first geyser's element setting to 30C (i.e Does not come on), in winter to 45C. You can also change it if you are having people stay over and you need 400lt at 55C. Back to 200lt at 55C when they leave.
  14. It jumped around the past 18 months (Moved in, Installed Solar Geyser, Installed Solar Panels (From old place), Installed borehole with 2 pumps!) But I am expecting it to normalise around 10-15 units in Summer with 15-20 units in winter per day. Almost viable going fully off-grid - Not sure what the wife will say about it!
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