The Eco-w's new VOC limit
The last Eco-w 20a controller came while we we camping. The first thing I noticed was it now comes in a printed box with graphics and the info on it. The second thing I noticed is on the box the VOC l...
Forum Discussion
Considering that the Isc and Voc comes into the back of the buck converter and what comes out is controlled by the MPPT program deciding what will best bring the batteries voltage up, you really don't know what the panel is doing.
I have noticed that the controller likes a slower rate of charge if it just wakes up and starts charging. Start low and stay gentle even though more is there. Put a load on and get the controller to ramp up the amps and it will stay ramped up until it switches out of bulk.
Another example is when using two, they don't share the load when charging once the battery starts tapering the acceptance rate. One controller will stay high while the other will drop down to a few amps. disconnect the low controller and the other will pick up the few amps if not too close to peak but not more. 15a between two becomes 15a on one.
So I think if you really want to know what the panels are doing, disconnect them from the controller.
I have noticed that the controller likes a slower rate of charge if it just wakes up and starts charging. Start low and stay gentle even though more is there. Put a load on and get the controller to ramp up the amps and it will stay ramped up until it switches out of bulk.
Another example is when using two, they don't share the load when charging once the battery starts tapering the acceptance rate. One controller will stay high while the other will drop down to a few amps. disconnect the low controller and the other will pick up the few amps if not too close to peak but not more. 15a between two becomes 15a on one.
So I think if you really want to know what the panels are doing, disconnect them from the controller.
