This depends on how many rigs you own and how many times you want to change things around.
For your first RC you can skip this generally. If you find you are getting into it and buy more rigs you may want to invest in a solder station. Between my son and I we have an OG 2.2 Wraith, OG SCX10, SCX10II, SCX10III, TRX-4 Bronco, Losi TLR 22 2.0 SCT, Losi 22S SCT and 2X SCX24s.
If you want to swap the ESC or motor, you will need to solder. If you buy a battery that does not have the same connector, you will need to solder. If you want to move the electronics around and the wires are really long, you will want to shorten them and need to solder. If a solder joint breaks, you will need to solder.
Options:
- If you have a local hobby shop near you they generally offer to solder up your equipment for a fee
- You can buy a battery that has the same connector as the ESC you chose (you may still need to solder the motor wires though)
- Have a friend with a solder station do it for you
- Buy a solder station and have it for years to be able to do all of your own soldering (This option if you have NOBODY that can solder for you or if you think you'll be getting more rigs and or changing out motors / ESCs down the road)
Between the two of us we have used our solder station about a dozen times since the start of this year. This was due to new ESC / Motor combos, new rigs and new batteries.