Advice on deep cycle setup?
Hello, I have a Safari van that I've converted into a camper. I replaced the starting battery with a Duracell Ultra Dual Purpose (Starting/Cycling) Battery that cost $105 (got it at batteries ...
Forum Discussion
So at some pt in time (abs) the battery needs 70w to maintain 14.8v.
The controller produces power @ Vmp and sends it to the batt then the controller cuts off the panel, panel V is now Voc and no power is sent to the batt. Based on the batt's response, the controller adjusts these pulses to maintain 14.8v.
Ya add a 44w load and now the ON pulses will be wider (longer) because the load is using some power and the batt's response will be different.
Bucking goes on anytime power is going through the controller (ON pulses).
Bulk is when it is on all the time with no OFF pulses. MPPT has the ability to force the panel to operate @ Vmp vs batt V.
Here is my homemade (MS paint:W) sillyscope that stopped it all for a moment, at the time it was 50% duty, on 50% of the time, off 50% of the time, 2A (4/2), 17.9v {(21+14.8)/2}. If a load was added the duty cycle would go up and the 4A/14.8 pulses would be wider while the 0A/Voc pulses would be narrower.
The controller produces power @ Vmp and sends it to the batt then the controller cuts off the panel, panel V is now Voc and no power is sent to the batt. Based on the batt's response, the controller adjusts these pulses to maintain 14.8v.
Ya add a 44w load and now the ON pulses will be wider (longer) because the load is using some power and the batt's response will be different.
Bucking goes on anytime power is going through the controller (ON pulses).
Bulk is when it is on all the time with no OFF pulses. MPPT has the ability to force the panel to operate @ Vmp vs batt V.
Here is my homemade (MS paint:W) sillyscope that stopped it all for a moment, at the time it was 50% duty, on 50% of the time, off 50% of the time, 2A (4/2), 17.9v {(21+14.8)/2}. If a load was added the duty cycle would go up and the 4A/14.8 pulses would be wider while the 0A/Voc pulses would be narrower.
