Pv Array Design; Sizing The Array - Victron energy EasySolar-II GX Product Manual

EasySolar-II GX - Product Manual

6. PV array design

6.1. Sizing the array

We recommend to use the MPPT Sizing Calculator available on our website
• The solar charge controller will operate only if the PV voltage exceeds battery voltage (Vbat).
• PV voltage must exceed Vbat + 5V for the controller to start. Thereafter minimum PV voltage is Vbat + 1V.
• Maximum PV Array open circuit voltage is 250V.
• Maximum PV Array short circuit current is 35A.
For example:
• Minimum number of cells in series: 144 (4x 12V panel or 2x 24V panel in series).
• Maximum: 360 cells (10x 12V or 5x 24 panel in series).
Remark: at low temperature, the open circuit voltage of a 360 cell array may exceed 250V, depending on local conditions and cell
specifications. In that case, the number of cells in series must be reduced.
The MPPT component of the EasySolar-II GX is pre-programed to match the nominal battery voltage requirements of the
included inverter/charger. Specific battery voltage charging parameters may need to be programmed in addition to the inverter/
charger voltage parameters.
Page 9 PV array design