Good day,
Regarding a 24V system, what does the MPPT manual mean by the following indicated in bold below?
"3.3 PV configuration (also see the MPPT Excel sheet on our website) ● The controllers will operate only if the PV voltage exceeds battery voltage (Vbat). ● PV voltage must exceed Vbat + 5 V for the controller to start. Thereafter minimum PV voltage is Vbat + 1 V. ● Maximum open circuit PV voltage: 150 V or 250 V, depending on model.
For example: 24 V battery, mono- or polycristalline panels, max PV voltage 150 V: ● Minimum number of cells in series: 72 (2x 12 V panel in series or one 24 V panel). ● Recommended number of cells for highest controller efficiency: 144 cells (4x 12 V panel or 2x 24 V panel in series). ● Maximum: 216 cells (6x 12 V or 3x 24 V panel in series).
48 V battery, mono- or polycristalline panels, max PV voltage 250 V: ● Minimum number of cells in series: 144 (4x 12 V panel or 2x 24 V panel in series). ● Maximum: 360 cells (10x 12 V or 5x 24 panel in series)"
Is 24V charging capped at 150V? (even with the 250V series)
