Hi ccrider098, I have a 400 too and use a small solar charger to keep the battery topped off. I use a small 50w panel and a decent 3-stage Renogy PWM charging controller. I added a small power center… (View Post)
I had success with this modification, too. I removed the existing speed control switch and used that corner to hold the new PWM DC motor control circuit board. I also used the existing knob hole for … (View Post)