It doesn't list a current limit, and the label is too blurry to read. Based on the wattage they specify, it *might* be 31.25A, 26.7a, or 25A, or could be some other unrelated number. Can't know what it is, unfortunately, making it hard to know if it is useful or not.
Whether that's enough for your usage or too much for your battery, I don't know. Your controller pic doesn't show what it's specs are, or any info I could use to find it on the web; without any data on what you already have, I can't say if this one would be appropriate to replace it with to keep the performance you already have, without damaging your battery, etc.
I couldn't find any data on your motor (or the rest of the system) on the web based on the numbers or shape, etc., so I don't know what kind it is or what it's specs are. General data on the itank moped suggests it's a 1500w system, but voltage isn't listed (except a couple that state multiple voltages). Speed is unknown; some say it's max of 21mph while also stating it is 15mph and 28mph, range claims vary quite a lot as well, so whether any data on the vehicle is trustworthy I couldn't say. Best bet is to ask the manufacturer for your exact model and version (if they even know).
If your motor is a three-phase BLDC motor, and it uses standard hall sensors (UVW / ABC), then this controller can drive it. If it's not BLDC or doesn't have the typical sensors (there are several possible ways to get position data out of a motor, almost all of them "better" than the common way of doing it), then this controller probably can't drive it.
It's probably not sinewave since it doesn't specify that, so it'll be noisier than the original. There are two kinds of sinewave controllers--plain old "lookup table" types that work the same way the typical square/trap controllers do, other than being quieter, and FOC controllers, that drive the motor better (but have to be tuned to the motor to work, where the other kinds work with nearly any common BLDC motor "out of the box").
It does have decent wiring directions (not true of most typical controllers), so the hardest part of installing it would be tracing out all the wiring already on the moped.
Note that if you have any functionality on the moped that depends on your existing controller (such as displays, etc), then you'll have to find alternate devices to replace any of that functionality you want to keep.
If you have specific things you'd like the vehicle to do, under whatever your specific riding conditions are, I'd recommend making yourself a complete list of them, so you can use that to compare different controllers / kits / etc to find ones that will do as many of those things as possible in one.
FWIW, from your info provided so far, I don't see that there's a problem with your controller you already have, just your wiring. Since you have to fix that no matter what else you do, then if you first make a complete wiring diagram of everything exactly as it is now, then just redo each connector, one wire at a time, with new connnectors, starting with just the ones you already know are problems, until everything works, you woudln't have to change anything and go thru all the hassle of figuring out what you have so that you can get something compatible.
48/60/72 Volt 1500/1600/1800 Watt Electric Scooter/Moped/Bike Brushless DC Motor Speed Controller
Item #:
SPD-481500BLDC
Designed for 48V through 72V brushless DC motors between 1500W and 1800W. Replaces controllers with fewer connectors because most of the connectors are optional to use.
- Operates from 41.5 through 84 Volts.
- Under Voltage protection 41.5 Volts.
- Current limiting feature helps prevent controller damage due to over-current conditions.
- Under voltage protection feature prevents over-discharge and extends battery life.
- Compatible with standard 3-wire variable speed hall-effect throttles.
- Dimensions: 8" L x 3-1/2" W x 1-3/4" T
- There is a top speed adjustable limiter for this controller which is item # THR-LIMITER25
- There is an adapter to connect a battery indicator to this controller which is item # PSW-ADAPTER1
- There is a jumper plug to put the 3-speed control onto high speed without installing a switch which is item # JMP-3F1T2
