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Thank you for the great forum, Safe Driving over the weekend. Sincerely Jason


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PJJ last won the day on February 10

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  1. PJJ

    Inverter Types

    Yeah it all fun and games while its still a newsletter. But once official documents start looking suspect it gets interesting, like when I got my US Visitor VISA I noticed that they had my given name correct with both parts, except they omitted the hyphen, and of course my passport includes the hyphen, I remember shaking like crazy when we got to the customs booth on the US side, luckily it was just a quick thank you sir and I moved on. But on the SA side I guess my anxiety might have been boiling to the surface, I was "randomly selected" for a search, they even ran a glove through my hair and analyzed it (I am assuming they thought I might have been some kind of drug mule) my hair as well as the sweat under my arms was analyzed in a little machine they had there.
  2. PJJ

    Inverter Types

    I know people with multiple names have a hard time with call center agents etc. But lets all take a moment to pay our respects to people like myself with a hyphen in their name... Sure it looks like 2 names on paper, but its only one. Even my drivers license has my initials wrong I tried to get it fixed the last time I went for a renewal, but I guess the person behind the counter thought I was just another idiot that added his middle name to the first name box.
  3. Just a word of caution, just know what you might be getting yourself into, if the product support is bad (or maybe even non existent) Then you could find yourself beholden to help from people on forums willing to help you, or in extreme cases even a couple of friendly Aussies providing you with firmware updates because the manufacturer could not care less.
  4. Here in attendance! I have a Sonoff basic on my pressure pump and its been there for over a year now like Jaco says, I also have the POW on my geyser, its not been in there for as long as the basic has been on my pressure pump, but so far so good.
  5. PJJ

    New to Solar.

    Sorry to derail your thread but I am pretty sure if it says Averge you might have stolen telecommunication batteries. Its been said on here a lot but that Carte Blance piece a while back made it clear that Averge don't sell to the public, I am not sure if that has changed since then, but maybe ask your installer where he bought them from just to give you peace of mind.
  6. @anotherbrownbear should be able to help you.
  7. Very much possible, just inefficient. You would be doing double conversion the whole time AC-DC-AC. This would also make your potential charging current pretty bad, let me explain. Say your loads are 150W AC You go and buy a 12/30 Bluesmart charger. So now you have 30A of charging current, not too bad, except you will use around 12A (150W / 13.5V = 11.1A But there are also inverter efficiencies to take into account) just powering your loads. So only the remaining 18A can be used for charging, obviously this quickly spirals out of control as your loads increaase, if your loads are say 300W You will be using 22A of the chargers 30A capacity only power your loads, and there will only be 8A left for charging. If your loads are say 400W you would need the entire capacity of the charger simply to keep the loads powered, and you won't have any real charging happening. I would say go with a busbar because then you can easily fuse the connection going to the battery.
  8. Also I would not recommend you do a install without a MPPT. If your system had a shutdown event (lets say you hit minimum SOC) and the AC falls away there is no way to start the PV Inverter again (Because it needs the AC from the Multi to couple to) so you would sit in a deadlock position where the sun could be shining but since your batteries are too low to start the AC Inverter, you also can't by proxy start the PV Inverter.
  9. Very true, if I look at my house consumption 80% of the time its below 500W, with only peaks when things like the Geyser and Stove start chugging away, that's probably why I was able to get away with a single 800VA Multi for so long. My problem however was if both the fridge and chest freezer compressor both came on at exactly the same time I would trip the little Multi (It only happened like twice, both times after they were left disconnected for a while and reconnected back at exactly the same time) those compressors have insane startup current. But since I have the second 800VA unit on the wall its never been a problem since.I can also now for the first time ever use my pressure pump when the grid is down, its a 0.85KW pump. At first I wondered whether it would be worth it to add the second Multi, but when loadshedding started again and I had to forgo a few showers the decision was easy.
  10. Not necessarily, if you go the Axpert route yes, but If you buy a Victron or Goodwe you can feed in excess solar power (granted while the grid is on) to those loads, without worrying about a big load taking your system down in the event of a grid failure.
  11. The problem with going off grid is generating that last say 20% of your needs. If you stay on the grid, with a decent battery bank you can generate 50-80% of your power needs without blowing the kitty. But that last 20% gets exponentially more expensive to supplement, its definitely not linear. Also like Macleod pointed out, financing, you might have R50K in savings somewhere you can raid for a nice on-grid system, but R100K+ would see you having to finance a portion (or all for that matter) and capital is a finite resource.
  12. I am not a member on any of the 4x4 forums, but I remember stumbling onto a thread one day on some SA 4x4 forum, and the one guy had the perfect idea for a perpetual motion machine, other members tried to explain to him that it wasn't possible, to him the law of thermodynamics was just a annoying law soon to be legislated away IIRC he also drove a Land Rover, make with that what you will .
  13. PJJ

    Solar quote

    How exactly is 5.4KW worth of panels considered 19.5KW? I don't see a generator in there? If its truly a off grid setup (No AC available) then you definitely need a backup generator, that solar array will on a bad weather day only generate around 3-5kWh for the whole day and you will be sitting in the dark. I would say to even consider "Off grid" you would need a backup generator, and double that solar array. Edit: I realize that you didn't say its a Off grid setup, I simply inferred it from the quote.
  14. Fun fact about these, the amount of air changes required will be dictated by the maximum CO2 concentration you would want on the inside of the building. So the best way of actually designing this would be to have a CO2 sensor inside the building monitoring ppm, once the concentration goes above say 600ppm you start ventilating, once you reach 450ppm you stop. But the reason why I think we have bigger systems in the first place is because our mall experience is different to the ones in the developed world, in the developed world, you have fewer shoppers going to more malls, but each shopper also has much higher purchasing power than the average South African shopper. So fewer people with more money = the same as more people with little money. But having more shoppers = More CO2, and that CO2 needs to be taken out, whatever they are spending R10 or R10K at the mall. I saw this firsthand in the US, the malls where quite empty compared to what I am used to, I don't know how it is where you guys live, but here in Limpopo, if I go the local mall over a weekend the mall is guaranteed to be packed, however its mostly just people coming in to buy 1 shirt, or even just to buy a R15 Pie at the King Pie in the middle of the mall.
  15. Now that is Savage! I'll see myself to the punitentiary


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