Jump to content
  • Our picks

    • Good evening all,

      I'm new to the crazy world that is solar. I'm looking at getting my first system installed and my word, there is a [email protected] load to learn.

      - I stay on the south coast in the EC

      - I have an asbestos roof that faces approximately NW and SE. It is a very low pitch, I would guess below 20. The old building plans I found don't indicate what it is.

      - I have a large rear garden where I could build a NE facing structure (that could double as an entertainment area). The wall is 8.8m across and there is about 18m of grass to the shed. I can't go too close to the shed because the neighbors have a huge tree there that would block the low winter sun. 

      - we use about 26 units a day

      - 0.75kw pool pump running 10 hours a day

      - 150L kwikot geyser is outside and on a Geyserwise. Running 6am - 9am and 6pm - 8pm and set to 60 C.

      - 0.75kw DAB water pump pushing water form tanks into the house.

      - home office running about 200W 14 hours a day.

      - lots of LED lights. a gate motor, security alarm, etc.

      After checking what some friends have installed (all have Goodwe), and how they using their systems, I'm leaning towards:

      - 12 x JA Solar 455W Mono MBB Percium Half-Cell Silver Frame MC4

      - 2 or 3 x Pylontech US3000C 3.5kWh 

      - Sunsynk 5kW Hybrid Inverter

      I'll split the house on essential and non essential circuits. Essential would be home office, all lights, fridge, alarm, gate motor, water pump that get used day and night. Non essential would be all plugs, geyser, pool, oven, stove, dishwasher, washing machine, etc. I hoping that there is excess solar, then it can be used on the non essential circuit when the sun is shining.

      1. Do you think that the system above would work nicely?

      2. I assume the non essential circuit must still go through the inverter if I want excess solar to go into it? This would mean that I need the 8kw Sunsync?

      3. If Eskom goes down, would the solar still be producing power or does it kick over to batteries? 

      4. I can get one of those Geyserwise Titanium PTC elements if it would make a difference? It is just 2 and a half people showering every day, and washing dishes once a day.

      Your opinions would be greatly appreciated. If I'm way off, please let me know. 


      P.S. I still don't understand the neutral / live bonding thing on the Sunsync/inverters. That is a story for another day... I need excess brain power for that.

      • 12 replies
    • Hey all,

      Happy Christmas Eve!

      Wish it was happier for us....

      We were tricked into purchasing a 5kVa Growatt and selling it to a Pastor Wesley Solomon at Founders Memorial Congregational Church in Coronationville.


      He claimed to have been scammed too many times that now only did COD and would not pay a deposit.


      Hubby delivered the Inverter, ther grounds keeper signed for it and produced a cheque. 

      Cheque was completely legit, problem was it was donkey years old and the account didnt exist anymore.

      Conned out of 10k the day before Christmas.

      Be safe and careful guys, these people really dont give 2 hoots what position you in and what your family is facing.

      December has us R22250 down so far and a R21500 loss on a vehicle due to age....


      Down and out but we managed to get the kids at least a lil something.


      Merry Christmas all, take care.
      • 14 replies
    • Victron DIY Install
      Got the sign-off from CoCT about a month ago, so my DIY solar project is finally done and dusted. Thanks to everyone on the forum that provided advice - I probably would have stuffed it up if it wasn't for you.

      The whole project took about three months of evenings and weekends to finish, and was a welcome distraction from the current state of the world.


      4 strings of 4 Canadian Solar 400Wp poly panels in series, facing NNE.


      Another string of 4 Canadian Solar 400Wp panels in series, facing WNW.

      All five strings are paralleled together for a combined 8kWp.


      This is my main DB. CoCT installed a new split prepaid meter. According to the technician that installed it it has built-in reverse power blocking. I have tested it to see what it does when I try to feed in power in to the grid, and it charges me in both directions. That is perfectly fine in my opinion - much preferable to it tripping when there is momentary feed-in.

      Grid power is measured by an ET112. There is a breaker that connects the main DB to the solar installation in the scullery:

      Top-left is the AC DB. Top-right is the DC combiner box. Bottom left is the Multiplus II 5kVA inverter, and bottom middle the SmartSolar 250/100 MPPT. The SmartSolar was initially running a bit hot for my liking, so I mounted it on a 6mm thick aluminium plate which brought down peak temperatures from 82C to 65C. Bottom-right is the Victron Cerbo. The battery cabinet on the floor contains 5 PylonTech US2000 batteries for a total nominal capacity of 12kWh. I've set it to 80% DoD:



      Close-up of the DC buses.


      Close-up of the AC DB, with and without cover.


      Close-up of the DC combiner box, with and without cover.

      The geyser and oven, as well as the swimming pool DB are connected to the main DB, so those are unpowered when there is loadshedding. The AC DB in the scullery is connected to the output of the Multiplus, so all the essential loads stay powered when grid power goes down.

      • 12 replies
    • Hi Guys. My new installation. 24 x 390w JA Mono solar panels with an 8kw Sunsynk inverter and 2 x 5kwh Bull Lithium batteries.  More pics to follow soon...
      • 164 replies
    • This poll is designed to generate useful and engaged information from both consumer and installer. With the developing hype of super capacitors, we want to investigate and determine the right conclusion as to where its role is in South Africa presently and potentially in the next 4 years.

      Please take the poll and share so we can all benefit from the results.
      • 0 replies
  1. Renewable Energy

    1. Pay It Forward

      The Pay It Forward section is built on the goodwill of the Powerforum members. Come in and see where you can help out with components and assistance.

    2. Beat Load Shedding

      Battery backup systems . Basic  Systems to keep essential services running during power outages

    3. Starting In Solar? Feel free to introduce yourself

      Starting in Solar? New Comers Feel Free to Ask- There is no such thing as a silly question.

    4. General Discussion

      General discussion & Latest renewable energy news

    5. Questions & Answers?

      Unrelated To Renewable Energy. E.g. How To Prepare A Wall For Painting?

    6. Product Opinions & Reviews

      Renewable energy product opinions, reviews & questions

    7. Member Installations Showcase

      Please feel free to showcase your renewable energy installation, share, upload images & installation descriptions

    8. Solar Power

      Solar power discussion

    9. Wind Power

      Wind power & Wind turbine discussion

    10. Batteries

      Batteries, battery monitors, chargers, accessories & battery care

    11. Inverters

      Off Grid & Grid Tie inverters

    12. 309
    13. Accessories

      Cables, Circuit Breakers, Fuses, Electrical Accesories

    14. Water Heating & Pumping

      Water heating & water pumping solutions

    15. Hydropower

      Hydropower or water power is power derived from the energy of falling water or fast running water, which may be harnessed for useful purposes

    16. Sustainable Landscaping

      A sustainable landscape is a stable and productive ecosystem that conserves the physical and biological processes occurring on that landscape. Designed and managed sustainable landscapes maintain hydrological function, plant and animal diversity and biomass, soil integrity, and contribute to human wellness. Utilizing nature and landscape to promote energy efficiency and energy saving.

    17. Energy Use & Conservation

      Saving energy, energy saving appliances & tips

    18. Electric Vehicles

      An electric car is an automobile that is propelled by one or more electric motors, using electrical energy stored in rechargeable batteries or another energy storage device

    19. Alternative Fuels

      Some well-known alternative fuels include biodiesel, bioalcohol (methanol, ethanol, butanol), chemically stored electricity (fuel cells), hydrogen, non-fossil methane, non-fossil natural gas, vegetable oil, propane, and other biomass sources.

    20. The Internet of Things

      The Internet of Things (IoT) is the network of physical objects—devices,other items embedded with electronics, software, sensors, and network connectivity, that enables these objects to collect and exchange data. Such as : Raspberry Pi, Arduino

    21. 274
    22. Fundamentals Of Electricy

      Principles of Electricity, Theory , Calculations

    23. Industry, Product Hypes, Fads & Rants

      Hypes, Scams, Rants, Unproven Tech, Does it really work?

    24. Useful Resources

      Share Useful Resources

    25. Design Software

      Software to aid in the design of Renewable Energy Systems.

    26. Electronics & Tools

      Gizmo's , Ipads, Tablets, Smart Phones, Tools, Power Tools

    27. 181
    28. Group Buys

      Buying as a group local or abroad.

    29. Classifieds

      For sale and Wanted
      Commercial Suppliers Please make use of the Commercial Supplier Section

    30. Job Centre

      Post job opportunities here, or upload a copy of your CV if you are seeking employment in the renewable energy sector.

    31. Commercial Suppliers

      Suppliers to sell goods on the forum as part of a business. Companies, Sole proprietors and anyone who wishes to advertise products for commercial purposes are most welcome. Apply Here

    32. Social Responsibility

      The obligation of an organization's management towards the welfare and interests of the society in which it operates.

    33. Off Topic Discussion   (2,073 visits to this link)

      Off topic discussion, World News, politics & Current Affairs - It is optional to Join this club if it is of interest.

    34. Forum Suggestions & Support

      Suggestions & ideas are always welcome to improve Power Forum

    35. 31
  2. Other Top SA Forums

    1. MyBroadband - Broadband, Internet, gadget and technology discussions   (4,748 visits to this link)

      Get your broadband and tech questions answered and share your thoughts on gadgets, SA’s Internet and cellular networks.

      My Broadband |  Test Your Broadband Speed | South African Technology News

    2. Bike Hub - Mountain biking, road cycling and multisport discussions   (2,136 visits to this link)

      Get bike buying advice, answers to any cycling questions, find places to ride and people to ride with.

  • Create New...