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    • Are electrical Joins allowed in the roof?
      Good day,
      I have had some additional plugs installed at my house by a contractor.  I am mildly unimpressed with the quality of work.   Being rather handy my self i'm happy that the work however messy and rushed, shouldn't burn my house down. 

      However I am not familiar with the legislation and laws around passing electrical compliance. Hence the reason for the contractor.

       

      I have several concerns with their install.

      1: are joins in the roof allowed? If so can you just twist them with some electrical tape? Or does one have to use a chocolate block in some sort of box or enclosure.

      2: Can you run single strand cables in the roof without conduit? I think you can with twin flex.

      3: Does color coding of the wires matter? They have used blue as earth on the plugs instead of green? 

       
      • 36 replies
    • Hi all, completely new to planning solar and have been loving all the info on this site, my plan is to mostly DIY the install.

       

      I live in a 3 bed duplex in Umhlanga and can’t do thermal water heating(too difficult to get all owners approval) but can do PV, my usage is +-20KW / day and I have an east west roof at 18 degree angle. Budget of around R100k, I’m looking at:

       

      1 x Sunsync 5KW inverter.

      12x panels (450 watts or so with 6 panels facing east and 6 west).

      1 x 5 – 6kw battery, unsure make possibly hubble as I might want to add another at a later stage.

       

      Apart from my oven(hob is gas) and aircons I want to push everything else through the inverter as essentials and link the geyser to the aux/smart port, geyser has full smart control(timing / temp / usage etc), I have installed a 1.5KW element in it and wrapped in a geyser blanket + lagged all pipes, my plan is to heat water twice a day(as currently) with PV heating during the day and then Eskom or battery(is this advisable) in the early hours of the morning if any battery power is left.

       

      Any comments on running everything through the 5kw inverter, will make some changes in power usage at home during the day.

      What would the best configuration be for wiring panels into the inverter?

       

      I plan on placing orders for the main components in the coming weeks as I carry on with the overall design.

       

      Thanks in advance for any advice.

       
      • 21 replies
    • Following on from various conversations with people telling me to take the manufacturer's warranties and info with a pinch of salt, let's try draw some real world conclusions on the life expectancy / cycle life of Lithium Phosphate batteries. I'm especially interested in the veterans on the forum who've probably been running theirs for a number of years.

      Please reply to this thread with the following information:
      Battery Brand/Model:
      Installation Date:
      Cycles:
      Performance: (add your comments here) 

      So mine would be:

      Battery Brand/Model: Fusion 4.8kwh
      Installation Date: October 2021
      Cycles: 70
      Performance: no observable degradation

       

       
      • 20 replies
    • I’ve got 3 x 4.8kwh LifeP04 batteries rated at 80% DOD over 6000 cycles - that is over 16 years of cycles and my warranty period is only 10 years.

      When they were installed, my installer set up the inverter to drain down to 30% DOD  overnight before switching to grid and leave 10% in the batteries to cover for load shedding and power outages in the middle of the night.

      Now nobody likes paying for insurance and I suggest nobody likes leaving 10% of battery on the table every day for the odd occasion that Eskom goes boom while the sun is not shining. 
      So here is my idea. For the odd occasion that I need the extra battery, I’m comfortable draining the battery to 90% while keeping essentials running. I’m not going to be doing this every day - perhaps less than 10 times a year, or 160 cycles in the supposed life of the battery.

      So I'm rather going with a 80% DOD every night and in an emergency allowing the battery to drain to 90% before switch off. This reduces my payback period from 7.3 years to 6.4 years instantly.

      What do you guys think? Anything wrong with my logic.

       
      • 19 replies
    • I’ve got 3 x 4.8kwh LifeP04 batteries rated at 80% DOD over 6000 cycles - that is over 16 years of cycles and my warranty period is only 10 years.

      When they were installed, my installer set up the inverter to drain down to 30% DOD  overnight before switching to grid and leave 10% in the batteries to cover for load shedding and power outages in the middle of the night.

      Now nobody likes paying for insurance and I suggest nobody likes leaving 10% of battery on the table every day for the odd occasion that Eskom goes boom while the sun is not shining. 
      So here is my idea. For the odd occasion that I need the extra battery, I’m comfortable draining the battery to 90% while keeping essentials running. I’m not going to be doing this every day - perhaps less than 10 times a year, or 160 cycles in the supposed life of the battery.

      So I'm rather going with a 80% DOD every night and in an emergency allowing the battery to drain to 90% before switch off. This reduces my payback period from 7.3 years to 6.4 years instantly.

      What do you guys think? Anything wrong with my logic.

       
      • 19 replies
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