Update on the Powertech MP-3735 (65V/ 30A) controller.
We disconnected one unit and compared the A in as shown on the controller display with the A in as shown on the
battery monitor. Did this yesterday and repeated the exercise for the second unit today.
Happy to report that the amps in as displayed on each unit accords with the
monitor reading. Voltages also accord. So at the moment both units appear to be doing what they should. On both days with only 1 panel and controller working the
batteries have been back up to 100% (from 95% overnight) by mid morning. We are not using the
autopilot so its not a heavy use test.
With so few amps needed to return
batteries to 100% it has not been possible to see what the controllers are capable of inputting. Only then will we be able to answer the question are they capable of inputting the maximum
power expected from the Sunpower
panels.
It will be hotter in December/ January and we will be using more amps so that will be a better test of performance. We will monitor output and keep an eye on heat generation and see how they perform. They are certainly extremely easy to programme and to monitor via the display and menu buttons. We aren't ready to give up on them yet.
Thank-you for information and suggestions.