Free shipping on hundreds of products

MidNite Solar Classic SL-250 MPPT Charge Controller

The Classic SL-250 MPPT Charge Controller is a simplified SOLAR ONLY version of the Classic 250 with streamlined menus. The Classic SL-250 has a graphics panel and ground fault but no arc fault or Ethernet capabilities. The Classic SL-250 has a maximum output current of 96 amps, an operating voltage of 250 volts and works with 12 to 72 volt battery systems. As with the whole Classic Line, the Classic 250-SL has MidNite’s exclusive HyperVOC which extends VOC limits when needed. With a streamlined menu, these SOLAR only MPPT charge controllers are easy to setup and a breeze to install!

Proudly made in the USA with American workers!

MidNite Classic SL 250 Features:

  • User friendly menu structure
  • Manual Equalize
  • Built in DC-Ground Fault Protection (Earth Fault)
  • Communicates with the Whizbang JR
  • Dual display capable
  • 250VDC operating voltage
  • Exclusive HyperVOC extends VOC limits
  • 380 days of daily history, 24 hours of data at 5 minute intervals
  • 12-72 volt battery charging standard
  • Communications - Modbus & RS232
  • Will parallel with other Classic SL's, Standard Classics, and Classic Lites
  • ETL Listed for the USA & Canada
  • Made in the USA

MidNite Solar offers an industry first, an extended warranty for all the Classic MPPT charge controllers. Six months prior to the end of the warranty period customers can ship their Classic back to MidNite Solar with a check for $147 dollars plus shipping and we will replace any wearable parts and do a general tune-up. This will extend the warranty by 2 additional years, another good reason to purchase a Classic.

Classic SL MPPT Charge Controller Specifications:

  • 14.9"L x 6"W x 4"D
  • Warranty - 5 yrs.
  • Listed by ETL for US & Canada
  • CE Certified Listed
  • FCC Class B Listed
  • Made in the USA

Nominal Battery Voltage
12 Through 72 volts on Classic SL’s
Maximum Output Current

61A on 12V,
62A on 24V,
55A on 48V and
43A on 72V battery

PV Open Circuit Voltage VOC
(NOTE: See HyperVOC at bottom)
250V + HyperVOC (battery voltage up to 48V) 
Example: 200V + 48V = 298VOC
Power Conversion Efficiency
98% (Typical system)
Maximum Stand-By Self-Consumption (12V)
2.8W - 4W
Reverse Current At Night
Zero - Internal relay for reverse current
Low Battery Voltage
Low Battery voltage disconnect and re-connect of loads fully programmable 
with 2 Auxiliary outputs to control external load disconnect /re-connect switches
Hyper VOC
(NOTE: See HyperVOC at bottom)
Standard all models - Extended VOC range for cold climates
Ground Fault Protection
Standard all models - resettable, no fuse to blow
Charging Regulation
Bulk, Absorb, Float as well as Equalization
Battery Voltage Regulation Set Points
Equalization Charging
Adjustable Voltage and Duration, Manual or Auto
PV Reverse Polarity
Protected to Max VOC
( Classic MPPT Charger Controllers are fully protected from reverse current on both input and output)
Battery Reverse Polarity
Fully protected
( Classic MPPT Charger Controllers are fully protected from reverse current on both input and output)
Battery Short Circuit
Fully protected
Battery Temp Compensation
Automatic when BTS is installed, Adjustable mV per degree C per 2V cell
Programmable Auxiliary Control Output
2 Auxiliary outputs, Aux1 can be 12V out or dry contact, Aux2 is 12V out or Logic IN
Graphic Display
Graphical display
Networking Cabling
Standard 4 conductor phone cable, no hub needed
RS232 and ModBus openly published protocol
Remote Display
Display (MNGP) can be relocated and a second display can be added
Terminal Rating
75 C
Data Logging
380 days of daily history, 24 hours of data at 5 minute intervals
Positive Ground Applications
Requires 2 pole input and output breakers
Operating Temperature
Minimum of -40C to 50C - Controller will auto derate as temperature rises above 25C
Environmental Rating
Indoor type IP30 (The Classic is IP22 Rated to 60529 when used with Classic Drip Shield)
Conduit Knock-Outs
Single 1" conduit (35.05mm) on left and right sides.
Two 1" conduit (35.05mm) on bottom.
Two 3/4" conduit (27.76mm) on back.
5 Year standard
Weight & Dimensions
12 lbs (5.45 kgs)
14.9" x 6" x 4" (378 mm x 152 mm x 102 mm)
Shipping Dimensions HxWxD
19" x 8.5" x 5.7" (482.6 mm x 215.9 mm x 144.78 mm)
MNGP graphical display, 3ft networking cable (NOTE: MNGP standard with all Classic SL models)
Listed by ETL for US & Canada, CE Certified, FCC Class B, IEC62109 pending 

*HyerVOC: A non-operative VOC safety zone over and above the maximum input voltage for cold climates.

Click here to download the User Manual

Use the classic sizing tool

Charge Controller Specifics
Application Solar Panels
Display LCD Display
Feature MPPT (Maximum Power Point Tracking)

Write a review

Please login or register to review

MidNite Solar Classic 250 SL MPPT Solar Charge Controller

  • Brands MidNite Solar
  • Product Code: CLASSIC250-SL
  • Availability: In Stock
  • $767.99

Related Products

MidNite Solar WhizBang Jr

MidNite Solar WhizBang Jr  The Whiz Bang Jr is a current sense module that attaches to the standard ..


60 Amp Heavy Duty Disconnect Box

60 Amp Heavy Duty Disconnect BoxThe disconnect box allows you to turn on/off the power for multiple ..


Tags: MidNite, MidNite Solar, MPPT, Classic, SL, solar, CLASSIC250-SL