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JustinSchoeman last won the day on August 13

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  1. Yep - I have seen the Geyswerwise and a few clones, which use a separate DC supply. I was more thinking about the available headroom on existing solar systems. I have seen many with substantial over-production, and some for pure sell/buy back schemes. For most hours of the day, even a 5kW inverter has enough headroom to run a 3kW element, if there is some excess solar generation. So no need for separate DC systems or expensive AC/DC elements - just a relay to switch the geyser over to the inverter (when excess energy is available), and possibly a dimmer to regulate how much energy goes
  2. I see there are some basic discussions around the forum, and it seems quite popular in Australia (Google 'PV diverters')- but I see very little on the local market. Basically, I have a 150L geyser, currently set to 50°C. If I raise the temperature to 85C, then that is an additional 6.1kWh of energy 'stored' in the geyser. Of course it is only available as hot water, and is quite a leaky bucket - but it would be available for evening dishes and ablutions, and would certainly reduce the requirements for reheating the next morning. From what I see on the forum, most solar installation
  3. I have run my 200A Thermax on a cheapie 2.2kW chinese generator. Worked fine, but IIRC I was welding sheet at about 60A. Not sure how it would do at higher Amperages.
  4. In my testing, it seems to supplement from grid when inverter power is exceeded. I am not sure where it will trip though 8.8kW max AC, or 11.5kW max passthrough - I have not tested so far.
  5. Thanks - was referring to changing the original sensor. Even if the original is not a digital one, if it can be easily replaced with a digital one, it is not an issue. From your photo, it looks like non-polarised wires on the original probe, so very likely just a thermistor.
  6. Excellent. So is it a fairly straight forward job to swap them out, without damaging the mechanical cut-out?
  7. DS18B20 can operate with 2 or 3 wires - but would generally be overkill for this application, so it probably isn't. As I said, only found one post on this, and it was not very clear.
  8. Correct - just the thermostat (assuming of course the thermometer part is a DS18B20,or some similar probe that can be easily reused).
  9. That is one of the reasons I was contemplating the geyserwise thermostat. It is basically a thermometer + mechanical safety. If it reaches 90C, then the safety trips, and you need to press a button on the thermostat itself to reset it (if I read the manual correctly). This should protect against just about any dangerous failure mode.
  10. 1) No idea 2) Install 'Solarman' app, and follow the directions. (The automated setup does not work if you have special characters in WiFi SSID. In this case, connect to the logger's AP, enter the router IP in the chrome URL bar, log directly into the logger and set up the WiFi from the UI there.) Not sure if you can monitor from a laptop - I think there is only a cellphone app. 3) Generator will only power Load, not Grid.
  11. Hi all, waking up this thread again, as I intend to do something similar, and would appreciate some advice/input. Firstly, I would like to store as much energy as possible in the geyser, so the first step would be to install a tempering valve, so that I can store much hotter water in the geyser, without a scalding risk from the hot taps. But how hot can I safely make the geyser? I can find a lot of info on the safe minimum storage temperatures, and safe maximum outlet temperatures, but virtually nothing on safe maximum storage temperatures. Any ideas? Secondly, I need to add a tem
  12. The equivalent would be 5x Pylontech USB3000 + a 5kW solar inverter charger. So probably R140k. At R167k the Powerwall seems to be priced out of the market. On the other hand, if it sold at the US price of$6500 = R105k, it would be a good deal.
  13. Well, I finally twisted Jaco's arm into a non-blue install, and the results are beautiful... With the whole house as a dummy load, I also got a chance to properly test the battery and assorted bits. Load peaked at 11kW before the geyser controller managed to turn the geyser off, and then stabilised at around 8kW, with 195A draw from the batteries. After around 10 minutes, batteries, terminals and connecting plates were all still at room temperature. The wires connecting to the inverter were however a few degrees warmer. Glad I did not go smaller than the 70mm^2 I eventually settle
  14. Huh? The Axperts are marketed as having overload and short circuit protection. If the overload protection fails, then that is a feature of the inverter, that was sold to you, which has failed. If the supplier refuses to replace/repair it, then you can try either the small claims court, or the NCC. Just make sure you have met all the warranty conditions. Many Axpert suppliers have fine print in their conditions stating that you must have SPDs on AC inputs and outputs, or other such junk. They may try to deny the claim as your installation does not meet the minimum recommended requi
  15. I suspect this is the new battery you suspect to be coming? https://lithiumbatteriessa.co.za/collections/frontpage/products/lbsa-6kwh-48v-lifepo4-wall-mount-smart-battery-2nd-life?variant=36090380091559
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