From what I have seen and experienced, twin engined electric is no more reliable than gas, it's just much quieter.

For example, twin electric motors:

They will not operate from one controller, so, you need two separate controllers tied together with a Y harness. That is, unless you read the technical info with your advanced controller, and find that you can use separate channels for the throttle.

When you use two controllers, there is no guarantee that they will operate exactly the same. In other words, when you spool up the motors, the RPM curve may be different. What does this do? It means that the take off run will not be straight, the plane will veer opposite of the faster motor.

In flight, one controller might shut down sooner than another and you will have an in flight emergency you will have to kill the remaining motor and glide in. Now, if the field is noisy, you will not hear this until it is too late.

Why does this happen? It happens because the components are not manufactured according to precise ISO or industry standards, and the finished circuit board components have a variance in specifications. Each controller is slightly different.

Given these negatives, and the negatives of gas motors, electric wins. But electric does not win out because of reliability, electric wins out because of many other considerations, such as noise, mess, and environmental damage.

Al Gutkin