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Louw

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Everything posted by Louw

  1. @KLEVA It depends more on the soil type than the area. If you have sandy soil with a clay level less than 8 meters deep it is an option. The water sits in the sand above the clay. Otherwise you looking at a borehole. Check on the internet for suppliers. The one I used will tell you in 30 seconds whether it is an option just based on your street address (He has been doing it for 40 years)
  2. I bought a 4,500lt tank for R3,999 at Makro in last week. Best price i could get. I run a wellpoint at my Wife's practise. Luckily it is low lying so the water last most of the Summer. Getting around 1,300 lt per hour at 2.5m depth. In April it started struggling after 45 minutes usage, but luckily my controller allows 3 starting times. So I water half of the garden the one day (40min) with the other half the next day (30min). Wellpoint cost: R1,500 (Had a pump already) Water saving in first year: 250kl Payback time is calculated in hours!
  3. The pricing is from CPT website. Taking into account that the dams are at 61.8% vs 74.2% same time last year it is a question of time before we go to Level 3
  4. I am thinking that the issue might be with the pump. When I bought the house there was a pump installed. I tested it once on the solar and it ran fine. The bearings went and the whole pump was a right off. The new pump does not want to start on the solar. I am going to check what will happen if I replace the capacitor. When CPT (Not if) goes to Level 3 restrictions water will be R200.16 Inc VAT for usage above 50Kl/month
  5. @plonkster I have T105 so 225Ah in Total. From my limited research I am seeing more and more specials on Victron's. Hopefully the rand can keep stable at low R13's allowing me to buy one at a reasonable price. First need to sort out the water for the Garden. At R200/kl on Level 3 Water restrictions it seems to be a good investment (even after paying Eskom for powering the pumps) @The Terrible Triplett @ R23k just for the pump vs R5k for a 220V pump I am not sure it is a good deal. Would then rather spend the money on a Victron inveter/more batteries
  6. I am trying to get my pool pump to run from my solar. It is a stock standard 750W pump on a 2KW Chinese inverter. The issue is that the inverter can't handle the spike to start the pump. I am not sure if it is the inverter itself (which should be able to handle a 4kw spike) or if the surge in power requirements, increase the draw from the batteries (3kw surge = 125 Amps). I think it might be the second one as my MPPT also reset when I try it, so I think the surge causes a drop in voltage, resulting in the disconnect of both the Inverter and MPPT. Any suggestions on what i can do? I am thinking about getting a 24V Axpert 3KVA. Will this help as the spike could be covered from Eskom, changing back to Solar after the spike (Would prefer a Blue Inverter but can't afford it at the moment and when I go that route I want to upgrade to 48V, requiring more/new batteries.) I installing a borehole in the next 2 weeks which will add 2 pumps of around 1.1KW each. So I am hoping to be able to run the 3 pumps through the day from solar but currently i am struggling with 1!
  7. Have a look at the manual (Page 15), not the spec sheet which is showing the default settings: https://www.victronenergy.com/upload/documents/Manual-BlueSolar-charge-controller-MPPT-150-70-EN-NL-FR-DE-ES-SE.pdf Victron MPPT 150/70 can go up to 69.6V
  8. I would go with (70A Plus Base Load) / 14% (Maximum charge current for T105) i.e Base Load of 240w = 10A (70A + 10A)/14% = 571AH
  9. Anyone any experience with Zooltro solar panels? Take a lot has then at R2,700 for 260w. I.e free delivery and ability to use discovery miles
  10. Louw

    Wind Turbines

    If an Industrial size 3MW turbine placed at 100m in a scientific calculated high wind spot is 35% efficient I would be surprised if a 1kW turbine at 10m in anyone’s backyard is 33% efficient
  11. Louw

    Wind Turbines

    I would say that 1/3 is optimistic. The initial estimate for Gouda on the West Coast is 35% according to these stats: http://www.acciona-energia.com/areas-of-activity/wind-power/major-projects/gouda-wind-farm/
  12. Louw

    Wind Turbines

    @Mark With my research I have come to the conclusion that you should not look at average wind speed The amount of energy that you can generate as 6km/h is more than double what you can generate at 3km/h. If you look at graphs of windspeed against power it is not a straight line 1km/h + 9km/h = 5km/h average 4km/h + 6km/h = 5km/h average According to my knowledge the first example generate more power than the second one
  13. For people living in CPT. Accept the disclaimer and then tick Aerial Photograph on the top left. The quality is A LOT better than Google Earh https://www.capetown.gov.za/en/Planningportal/Pages/Disclaimer.aspx
  14. My brother is busy getting quotes for heating a pool. His house is a double story house, with high ceilings, so about 8-9M above the pool. The guy giving him the quote indicated that it is to high for a normal swimming pool pump and suggested a separate pump, circulating the water through 3x20 Evacuated Tubes. My calculations says it won't be effective: 800W/h/m2 x 2m2 x 3 = 4,800W per hour = 24,000W per day 24,000W / 1.17 / 42,000liters = 0.57C increase per day Am I wrong in saying that it won't help at all????
  15. Louw

    Wind Turbines

    Mike - Why don't you link a cheap 2,000W Inverter to the batteries powering a 1,500W element in your geyser. You switch the Inverter on when your battery reach 100%, using the BMV's relay?
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