diy solar

diy solar

Recent content by wattmatters

  1. wattmatters

    Whats more energy efficient: Off-grid or Grid-tie ?

    It's an important factor, although not the only one. I do to a certain extent. It has a direct impact of the standard of service delivery. Distributors here have a regulated revenue cap. So the more efficient they are, the better they perform for the customer. But they do need to learn to...
  2. wattmatters

    Whats more energy efficient: Off-grid or Grid-tie ?

    Which is why all you can ever actually do is deal with system averages given the grid is one very large and complex machine. Power generators knows how much is fed in, and consumption meters know how much is consumed. The difference is losses.
  3. wattmatters

    Whats more energy efficient: Off-grid or Grid-tie ?

    True, although it's not like there are not plenty of locations with a lot of rooftop PV to learn from.
  4. wattmatters

    Solar Assistant graphs freeze up

    It won't run on anything other than the supported hardware listed on their website: https://solar-assistant.io/help/getting-started/prepare-device
  5. wattmatters

    Whats more energy efficient: Off-grid or Grid-tie ?

    Whatever commercial / financial structures are put in place, in the end physics has the final say. As I said earlier, 1:1 net metering is incredibly generous. As an incentive to kick start the addition of some renewables it might have made sense but it really needs a sunset clause/date. In...
  6. wattmatters

    Whats more energy efficient: Off-grid or Grid-tie ?

    Physical efficiency and financial efficiency are different. 1:1 net metering has 100% financial efficiency. But the grid has losses too, depends on the distance the power need to travel. Typical transmission and distribution losses on our grid average out at ~7%. And here in middle of the day...
  7. wattmatters

    My build thread

    It that much cheaper than a mini cement truck delivery? Or would that be less than a minimum delivery amount? I know nothing of these things, just curious.
  8. wattmatters

    Whats more energy efficient: Off-grid or Grid-tie ?

    Search the forum, there are several threads on the topic of using excess capacity.
  9. wattmatters

    Whats more energy efficient: Off-grid or Grid-tie ?

    For example, this my last 3 days showing load (red) and PV output (yellow) showing how my load control makes good use of PV: I have a smart PV diverter for the electric water heater, an off-grid battery where charging is managed, and an EV with smart charge control, also to maximise use of...
  10. wattmatters

    Whats more energy efficient: Off-grid or Grid-tie ?

    You need to find some discretionary loads which can be shifted to daytime. The most obvious candidate is heating water / hot water storage. Another is an electric vehicle.
  11. wattmatters

    Air conditioner with adjustable wattage limit?

    Old thread but for this you want an aircon with DRED control. e.g.: https://www.daikin.com.au/faq/what-demand-enabled-response-dred Sometimes it's an add on card which is designed for utilities to be able to throttle down the power draw (without changing the temperature set point). DRED control...
  12. wattmatters

    Whats more energy efficient: Off-grid or Grid-tie ?

    This ↓ Put another way, a battery is a net consumer of energy. No point losing 10-15% of the energy going via a battery when you can buy it from the grid at the same rate you get as credit for exporting. 1:1 net metering is ridiculously generous. If you have it then the only reason to have...
  13. wattmatters

    Solar Assistant assistant

    They could use a different, more reliable, service.
  14. wattmatters

    Battery SoC% Discharge Question

    You are right in that battery SOC should not have such large steps. Something isn't right with the battery monitoring or BMS SOC calibration. They can drift and not be completely reliable. Perhaps consider installing a Victron smart shunt and monitor that instead. This is mine over last few days:
  15. wattmatters

    Solar assistant offline password or factory reset procedure

    Have you asked Solar Assistant help?
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