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Peter Topp

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Peter Topp last won the day on January 10

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  1. Hi

    DMI-65 as far as I have read up needs  continuous injection of sodium hyperclorite to act as an activator. This will mean you will have to inject it before the FRP vessel. 

  2. Borehole and Filterting System

    Hi Luqmaan Thanks for the compliment. First of all I am a newbie at this and all my knowlege is from research done on the internet and from above. 1. The high pressure filters are FRP 13"x54" (75L).They take 2 bags of birm or clinobrite. 2. The method to remove hydrogen sulfide is similar to removing iron and manganese. I cannot tell you what method to use as you will have to know the concentration by means of a water test to chosoe the best method of removal. If the amounts of iron are very large the FRP filters will be foulded up and even back washing will not help and you will have to use alternative methods. One alternative is chlorine injection to oxidise with filters. Another is Ozone injection with filters (very expensive). 3. The last stage filters are 5 Micron Sediment Filter, Activated Carbon Block, 1 Micron Sediment Filter and uv light. 4. I live in the East Rand so the price will depend on the suppliers that are near you. I got my filters housing from "Watericon" in Modderfontein. They are considerably cheaper than any other supplier I enquired at. 5. The mesh and disk filters I got from my local irrigation shop. Below is the best advice I can give you. The problem is that you sometimes need some expert advice and if the expert is going to help you it would be advisable to use their system of filtration with your input at a higher cost because it will cost you a lot more not only money but also frustration and disappointment exsperimenting if you have to redo the filtering system if it fails. You can start by having your water tested as nobody can give the right advice without quantifing the problem.
  3. Hi The documentation on the Voltronic site shows 4000W for the max pv input. This will only be for the new Axpert MKS 5K. Your documentation will show you the correct W if you have a older model. I do not know how the panels are connected. If you have 10 300w panels they should be connected with 2 panels in series and 5 series panels in parallel. This is not so good as the current is quite high >40 amps and the voltage low about 90v open circuit and working voltage about 73v. If you oversize by adding two panels (total 12 panels) as suggested it would be better as you will be able to have 3 panels in series and 4 series panels in parallel (open circuit voltage about 135v and about 33 amps max.). Max voltage allowed on inverter is 145v. Higher voltage less amps is always better and more efficient.
  4. Solar Heating feeding a Gas Geyser

    I thought I must add pictures of the system after insurance repair. The geyser wise shows the temp of my geyser that has been heated by solar ( not by a element) to 38 degrees C. The Atlas geyser control shows the water being controlled at 60 degrees C fed at 38 degrees C.
  5. To add to max A quick method to see if you have enough power. I would use a dc clip on ammeter to measure the load during max use and the min load when you go to sleep. The measuring point must be where the banks of batteries are paralled together to a single cable before it goes into the battery isolator. Now I would do a quick sum . By multiplying the amps measured by the voltage (48v) which would give you the watt power use. Now multiply the no of hrs it runs at max. Thhis will give you the watt/hrs. The same needs to be done for the min use. The total time use in the sum must the same total time the inverter runs off batteries alone. The two answers now needed to be added together. This sum needs to be less than 16000w/hrs if you allow the batteries to discharge to 50%. If not you will have to find the power offenders and lessen the load.
  6. Installation time

    Hi Johandup About your question on cb's . I will not get too technical. This all depends on what the battery charge is going to be for the input cb. I do not think anyone has mentioned this before. The output of the infisolar is 4kw about 18amps So the cb will have to close to that value (20amps). Also the wiring has to be of a higher value (25amps). I always wondered why the input cb and wiring suggested was 60amps and this is what I concluded after thinking about it for quite a while. The input cb has to be the output kw plus the battery charge kw plus loss kw. This is why the input power is higher . You can limit the input amps by seting the battery charge current down. I am sure you can damage your batteries if you charge at too high current. For lead acid batteries this is the formula. The maximum charging current = Battery capacity (Ah) x 0.2 I have two infinisolars in parallel and protect the input for each of them with 40amp cb's and wiring and have no problems. I only have one bank of 4x 12v 180ahr batteries so I have set the battery charge current down to 18amps each (36amps total). I have split the charging current between the two inverters. For me this adds about 8amps to the input. ( 4amps for each inverter ) without losses. 18amps + 4amps + loss = about 25amps x 2 input current (50amps mains input) A normal household is protected by a 60 amp single phase breaker . It does not make any sense to proctect the input to the inverters with 60 amp breakers unless you have or going to fit a huge battery bank and have to charge them with high current. The maximum input current for the infinisolar super 4K is 40 amps and will allow you charge batteries at 80amps max and this is about 18amps on the mains side. If you had two infinisolars in parallel and charge at max current a 60amp home breaker will trip. The input cb has to be the output kw plus the battery charge kw plus loss kw. 18 amps + 18amps + loss X2 = > 72 amps. This will only apply if you are charging from mains power and not from solar panels.
  7. Hi Willie As far as I can see and what you have asked for. The Axpert has two monitoring ports on each unit. A RS232 port where you can fit a lan cable to RS232 for communication. A USB port for communication. You cannot plug the lan port into a wifi, computer or switch because it has to be changed from RS232 to Ethernet to communicate. The other way is to use the usb port by using extending the usb cable with usb extender. The extender I am talking about uses lan cable between the two usb ends. The cable can be extended to about 30m. This method is a inexpensive. The monitoring software you are enquiring about you can get by reading the "Axpert monitoring " post. The other problem you have I think is that you will have three cables as I do not think you can monitor all three units with one cable unless you can change your RS232 to Ethernet and run the three cables through a switch near the units and now you can use one cable to PC or even use wifi using a wifi extender. I am sure there a more capable members to deal with this problem. I have had two Axperts in parallel and the extension of the usb cable is what I wanted to do before I changed my to grid-tie units. The other question I would like to know is .Do you use many heating devices between 5pm and 10pm? Do you switch off your geyser at night? Do you do all your cooking at night? Does the ironing done at night? Is there a air-conditioning unit being used? The pool pump you have already mentioned. The total rum time it is on. I ask these questions as these are the appliances that are power hungry and use up the battery backup. For a geyser you can use a smart device to switch the geyser on/off to suit the your setup. I had a similar problem and now I use gas for my stove and geyser as they are the biggest culprits of power use other than an air conditioner. I am sure there are many members that can add to this post.
  8. New Infini Super

    The supplier for my units are "Full Circle Solar" They been very transparent during my problems.
  9. New Infini Super

    Here is the reason the supplier gave for the lengthy repairs of my ifinisolar Super 4K units. I was the first to buy the new stock that had come in May 2017. After my systems dc circuit blew up and the manufacturer was contacted. The manufacturer said there were problems with a batch of dc boards but could not tell which units they were in. The manufacturer had to ship dc boards for all the stock the supplier had to replace the suspect units. This why I gave both my units in. This was the first delay. The second time the dc board blew up, all the stock had been used up for replacement of stock so I had to wait again. The units are working but the dc boards need to replaced again as it seems as the mannufacturer has realised it was not a batch problem but a design or layout problem. As far as the parallel problem I believe the manufacturer had not tested the system properly as the supplier tested other units at his home and had the same problem. I got the firmware to fix the problem however to me this problem should have been adressed long before as the units have been marketed for one and a half years. All the problems lead to the manufacturer being too haisty to market before proper testing. And this leads me to feel like a " guinea pig" to do the testing for them at the consumers expense.
  10. Infinisolar Super 4K Manual

    Version 1.1


    Infinisolar Super 4K Manual
  11. ROYAL Big Bang

    I agree with Chris Hobson as I have a blown up battery on a large cat generator . The room is well ventalated but the electrolite levels were not checked. It does cause rather a mess.
  12. Rainwater harvesting

    I thought I might add something about pressure tanks. Pressure tanks are made for household use when you mainly use small amounts of water. The pressure tank is meant to prolong the life of the motor and pump as it switches on less frequently. Some pump manufactures specify the number of times the pump should switch on per hr. A pressure tank also has to be pressurised and kept pressurised to work efficiantly. You will need or borrow a small compessor to do the job as the system will loose pressure through the bladder over time. You also need to check the pressure gauge on the system to see if the pessure control is working correctly when the system is working. The on/off pressure can be set for your own needs. Typically asbout 2bar to 4bar. The larger the pressure tank the less amount of times the pump needs to switch on. I use a pressure tank system fed from a jojo tank in parallel with my municipal water as the water pressure is bad. This system helps to boost the pressure when it is low. The new pump systems that use flow to switch on a pump should still be used with a pressure tank to help motor lifetime.
  13. Surge Protection For Solar Panels

    I had a lightning strike just after I installed my first pv panels and inverters. I lost my electric fence, some security cameras, pvr, intercom, gate motor control and tv. I did not want to check my inverters as I was convinced they had been damaged. To my supprise the pv panels and inverters were just fine when I checked so I guess the MOV's do help. I know nothing helps for a direct strike. Spark - over gap devices last longer where the effects on an MOV is cumulative thus having a shorter lifetime.
  14. Surge Protection For Solar Panels

    When I first installed my first solar panels I saw that I needed Type 2 surge arrestors for lightning protection. My series pv array would have to be less than 145vdc open circuit for the inverters I was using. I started looking and asking for dc surge arrestors. I did find them but they were very expensive compared to the ac ones. I did a little more investigation and this is what I conlude from my research. You can use a standard type 2 surge arrestor that you would use in your home DB board 230vac and it will be good to protect dc even at a higher value typicaly up to about 300vdc. This is because ac is measured in rms value and is .707 of the peak value which makes the dc value higher. The surge arrestor protection component is a metal oxided varistor. Type 2 surge arrestors can be used for ac or dc. I had some 230vac surge arrestors spare and used them in my installation. Later I decided to change my inverters to grid tie. When I changed my inverters I had to change my pv array to have more panels in series. The inverters would allow 580vdc open circuit. My pv array would be 450vdc open circuit max. but I wanted the protection to be higher for me to add more pv panels later. The surge arrestors I had would no longer be suitable for the installation. I started my search again for suitable surge arrestors. Larger value surge arrestors were expensive but I did find one place that was very reasonable. I evaluated the costs and this is what I came up with. The drawing is below. You can use your standard 230vac surge arrestors in series and for a sigle series pv array you would need 3 surge arrestors to protect a pv array up to about 600vdc. I hope this will help anyone looking for suitable surge arrestors for protection. Simple any easy to install.
  15. Solar Heating feeding a Gas Geyser

    Working with Solar Vacuum Tubes I have a interesting story to write on about during the installation of the solar heating system. When the vacuum tubes were installed on the roof they are individual pushed into the reservoir. One of the 20 vacuum tubes tip was accidenty damaged and it was not found during installation. The following day at about 11am there was a huge bang and it sounded like a gunshot. I later had neighbours asking what had happened. Well what had happened is that the vacuum tube that was damaged at the tip had lost its vaccuum and had filled with air. When it was installed the tip was now sealed off. When the sun heated the tube without vacuum and the air and other material inside started to expanded and eventually caused the tube to explode. I found pieces of glass 10 meters away. So beware when you install solar vacuum tubes to check for any damage.