lifebythemile
Well-Known Member
- Joined
- Jul 5, 2024
- Threads
- 9
- Messages
- 116
- Reaction score
- 165
- Location
- Metro Vancouver
- Vehicles
- 2023 Mach E Select RWD - Vapor Blue
- Thread starter
- #1
I've been using another app for years that allows for full expense tracking, reporting, etc. I've logged the milage and costs of my past 3 vehicles and know exactly what each one has cost me down to the cent. With having the EV I've been wanting to get more metrics, track more things, dive deeper into the data. None of the big commercial apps did what I wanted, even the more niche ones still lacked everything I wanted. So I decided to spend some time and get reacquainted with my old computer geek self.
This is the result, my own efficiency tracking app that tracks not only all costs, but also ambient temperatures. This enables much more granular reporting since EV's are affected by temperature much more than ICE vehicles are. Since it was fairly easy to add in ICE vehicle tracking, I'm also using it to track my motorcycle and given it a name of Amps & Octane.
It uses the ambient temp at the time of charge completion, it's not 100% accurate but will give a good indication of seasons. For individual charges where its not to 100% it uses previous charge end SoC and current charge start SoC, and the vehicles battery size to calculate how many kWh was used then the two ODO readings to give the efficiency of that charge period. I added this in since all the major apps do not calculate efficiency info if it's a "partial" charge or fill, I understand for gas engines since there is no precise metric of how much fuel was used and the only "precise" way is full-to-full. With EV's you've got the rather precise SoC % you can use to know exactly how much 'fuel'/electricity was used between charges. So now it doesn't matter if you drive 200mi and only add 10kWh while stopping at your parents home for dinner, you'll be able to know the efficiency of that mountain pass drive to your mom's house.
Right now it's running as a PWA (Progressive Web App - a containerized web page installed via Chrome or Safari) on my S25 Ultra as I am somewhat familiar with PHP and MySQL so it's not something I can "monetize", it's just a fun side project. I am rather envious of the TeslaFi system and would love to create something that gives similar per trip/per charge metrics, records each charge curve, factors in ascents/descents/wind into trip and overall efficiency metrics. That will require an in-vehicle "server" connected to the OBDII reader, so for now the next step is to create an Android Auto based mini-app that will allow me to log charges and expenses from the vehicle screen rather than having to pull out my phone.
This is the result, my own efficiency tracking app that tracks not only all costs, but also ambient temperatures. This enables much more granular reporting since EV's are affected by temperature much more than ICE vehicles are. Since it was fairly easy to add in ICE vehicle tracking, I'm also using it to track my motorcycle and given it a name of Amps & Octane.
It uses the ambient temp at the time of charge completion, it's not 100% accurate but will give a good indication of seasons. For individual charges where its not to 100% it uses previous charge end SoC and current charge start SoC, and the vehicles battery size to calculate how many kWh was used then the two ODO readings to give the efficiency of that charge period. I added this in since all the major apps do not calculate efficiency info if it's a "partial" charge or fill, I understand for gas engines since there is no precise metric of how much fuel was used and the only "precise" way is full-to-full. With EV's you've got the rather precise SoC % you can use to know exactly how much 'fuel'/electricity was used between charges. So now it doesn't matter if you drive 200mi and only add 10kWh while stopping at your parents home for dinner, you'll be able to know the efficiency of that mountain pass drive to your mom's house.
Right now it's running as a PWA (Progressive Web App - a containerized web page installed via Chrome or Safari) on my S25 Ultra as I am somewhat familiar with PHP and MySQL so it's not something I can "monetize", it's just a fun side project. I am rather envious of the TeslaFi system and would love to create something that gives similar per trip/per charge metrics, records each charge curve, factors in ascents/descents/wind into trip and overall efficiency metrics. That will require an in-vehicle "server" connected to the OBDII reader, so for now the next step is to create an Android Auto based mini-app that will allow me to log charges and expenses from the vehicle screen rather than having to pull out my phone.
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