This is a guide to gain continuously replenishing energy, which will allow you to rapidly break down the grinds for a number of achievements in this game for which energy is required.
Those achievements are:
Below is the method I've been using to replenish energy immediately upon using it all instead of wait 90+ minutes for it to build back up or spending real money.
I've used it on my Win10 Surface and it has worked every time:
1 - Ensure your internet is on, time is correct (automatically set), flight mode off.
2 - Launch 2020 game by going onto the web, going into the Microsoft store on the web and finding 2020 My Country. That will take you to the Store App and the 2020 My Country page. Choose "Play" from the page.
It is important you use the store/web link and not the tile on your home page. Also, leave this store link page open.3 - Do things to use up all your energy (or half your energy, or 3/4 ... whatever).
4 - With the game window still open, go down and
switch flight mode on (on the Surface/Win10 it is one of the options which appears on the quick settings menu which is accessible at right in the bottom toolbar)
5 - Then right click on the time and date at bottom right of screen and choose to alter date/time. From this settings screen - go in, turn
off the option to set time automatically, and put the time backwards by two hours.
6 - Minimise the settings screen, you'll be back at the 2020 game screen. Close game.
7 - Turn flight mode
off. Ensure internet connects.
8 - Launch the game from the store link (the "Play" button).
9 - Your energy should be up to maximum when you re-enter the game.
10 - Close the game again.
11 - Adjust the time
forward so it is correct.
12 - Open game via store link.
I'm not sure if you need to do Step 10, but I do it anyway just to be safe.
Also, I've had the full energy appear in game after Step 5, so when I've gone back into the game (Step 6) I've had full energy. when that occurs, all I have done is turn flight mode off, reset the time so it is correct, and continue to play.
Whether your process only takes 6-7 steps or the full 12, it is a good idea to ensure you are connected to Live inside 2020 My Country by going down to the bottom, getting your achievement/task list up and checking your progress by clicking on the Achievements tab (in gold) at right.
I've used this method to rank up from 20% done for vehicle purchases, mishap fixes and jobs done to about 85% or so in about 6-8 hours. It would've been more than that but I mucked around a little as I went along!
The trick will also work for clearing territory (which requires 2 energy per clear), and will help build roads when you need to use energy to clear territory for the road.
Hope this helps. Any feedback, add to the comments!