10 volt regulator

 I've had the new regulator in the box since 2016.

The old regulator was working OK. but after some issues trying to measure the voltage I decided the time had come to install.

For curiosity I attached the scope to see the differences.
The old bimetallic system works by switching 12V on and off resulting in an average of 10V.
Fuel gauge shows 4 gallons.

The new one works by magic and outputs 9.9V constantly
Fuel gauge shows 3.5 gallons.

When it stops raining it will be interesting to see the indicated temperature and then measure the water temp by another means.