Out of curiosity I've let it rate Low<-Tech Magazine, a website run on an ARM SBC powered exclusively with off-grid solar power, and that only achieves 87% / A.
Starfighter
joined 2 years ago
Can't exactly remember which car it was but some of the early and smaller EVs didn't necessarily come with a navigation system. Think along the lines of Chevy Bolt or Nissan Leaf.
Not OSM or Open Source but "A Better Route Planner" (ABRP) was one of the first good EV routing apps and got pretty popular.
Especially early on it was often smarter than the built-in routing systems if the car even had one.
Also available as a website: ABRP
And don't forget about ESPHome which is part of the Home Assistant Project and allows you to easily get your microcontrollers up and running.
If you have such a system up and running already you could try to modify it before ripping it out and starting from scratch.
Borrowing an idea from the machine learning approach you could additionally take the difference in average outside temperature yesterday and the average forecasted outside temperature today. Then multiply that by a weight (the machine learning approach would find this value for you but a single weight can also be found by hand) and subtract it from the target temperature before the division step discussed previously. Effectively saying "you don't need to heat as much today since it will be a little warmer".
I fear that's about all you can do with this approach without massively overcomplicating things.
This is effectively what a thermostat does.
The problem is that the controller won't know how well insulated each room is, how cold it is outside (including wind speed), which doors and windows are open and when, what people or devices are doing in each room.
The way thermostats solve this is by creating a closed loop where they react to how the room reacts to their actions.
Depending on how your heaters work you'll likely need some dynamic component to react to these unforeseen changes unless you can live with the temperature being very unstable.
To get a rough idea of how long the heaters will have to run you can look at each room in for the last n days and see if the heater's runtime was long enough to (on average) hold your target temperature. Dividing the average temperature with the target temperature will give you an idea whether they were on for too long or too short. (If the heaters have thermostats you'll likely need to subtract a small amount from that value so that it will settle at the minimum required heating time)
If that value is close to 1.0 you know that on those days the heating time was just about perfect.
Once that is the case you can take the previous days heating time and divide it up over the cheapest hours. The smaller of a value n you choose the more reactive the system will be but it will also get a little more unstable. Depending on your house and climate this system described here might simply be unsuitable for you because it takes too long to react to changes.
There are many other ways to approach this very interesting problem. You could for example try to create a more accurate model incorporating weather and other data with machine learning. That way it could even do rudimentary forecasting.
Are there any implementations of this out there or is this purely theoretical (at this point in time)?
* $400 / yr
Upvote for lowtechmagazine. Running your whole website off-grid, only from solar power is such a cool concept.
According to Scott Manley's video on the topic the probes would need to arrive at the correct time in order to form what is effectively a huge phased array antenna.
Only then is the combined transmission power of these tiny probes large enough to be received on earth.
It is, kind of. The plug is secured by 6 stops (or tabs) along each side. The positive pressure differential pushes the plug outwards into those stops.
To remove the plug you uninstall 4 bolts which allow the plug to go up and over the stops, after which it can hinge outwards on a hinge found at the bottom of the plug.
Dann lieber auf das Kreuz: