MidNite Solar Model: CLASSIC 250KS
Excellent choice for up to 40 Batteries at 120 VDC
MidNite Classic charge controllers offer a host of useful features not found elsewhere. This includes Arc Fault Detection and Ground Fault Protection (GFP) which eliminate the need for a separate GFP breaker assembly.
Three models accommodate solar arrays with operating voltages up to 150, 200, or 250 VDC of operating voltage. A feature called HyperVOC protects the controller from damage when open circuit v exceeds the operating voltage by a margin equal to the battery bank voltage. For example, the Classic150 will operate normally with up to 150 VDC of input, but when used with a 48 VDC battery bank operating at 50 VDC will withstand up to 150 + 50 = 200 VDC. This allows you to maximize array size even when using higher voltage battery systems. The table below represents maximum power only, be sure to consult the power curves in the user's manual when sizing your PV array as allowable current varies with array voltage.
Use MidNite 300 VDC breakers (see Electrical Distribution) for any ower source over 150 VDC. Depending on your load center, a separate MidNite Big Baby Box (see Electrical Distribution) may be needed to accommodate the breaker. On the battery side of the controller, breakers need to be rated for the highest battery charge voltage, breakers rated at 125 VDC or higher can be used for battery banks p to 48 VDC.
Classic controllers have MPPT modes for solar, wind, or hydro with user adjustable power curves, and a learning mode for self optimization. Classics can be stacked to act as one large controller without a separate hub. They have two auxiliary outputs, a dry contact relay and a 12 VDC output. The Classic has built-in Ethernet, USB and RS-232 ports for two-way communications. An internal IP address allows the Classic to directly output operating data to the Internet or a local network without a central server. Each unit also has 32MB of internal memory for data storage.
A built-in wizard covers battery bank size, string voltage, wind turbine selection, power and wire loss, PV breaker sizing and more. Firmware is user upgradable by downloading files. Each unit includes a sealing kit for dusty or salt-air environments, but sealing can reduce output by up to 20%.
The MidNite Graphics Display Panel (MNGP), is a remote duplicate of the LCD on the unit.
Dimensions are 15"H x 6"W x 4"D, and weight is 11.5 lb.
The Classic 150, 200, and 250 are Listed to UL 1741 and CAN/CSA C22.2 No. 107.1:2009/09/01 Ed: 3 (R2006) and are covered by a 5-year warranty.