Midnite Classic 250-SL Solar MPPT Charge Controller


SKU: Classic 250-SL Category:

Volume discount pricing

MPPT controllers ship free (cont. U.S. only), call for volume pricing when ordering multiple controllers

The Midnite Classic 250-SL solar MPPT charge controller offers maximum flexibility and many features that will increase the reliability of your solar off-grid system and the life cycle of your batteries. The Classic-SL is a solar-only version of the standard Classic MPPT charge controller. It is a simplified version that does not include arc fault protection, and it does not have Ethernet capabilities. Internet connectivity and communication features like the My Midnite and Local App are disabled.

The controller comes with the standard ground fault interrupter to provide a safe installation. The simplified graphics panel and the settings menu do not feature the dip switch programming you find in the standard Classic model.

Classic SL models are engineered for solar systems, and they are not compatible with the output voltage of wind and hydro energy systems. All Classic SL charge controllers come with a five-year warranty.
There are currently 3 Classic SL models that can accommodate large solar arrays with up to 150, 200, or 250 VDC of operating voltage.

Midnite Classic 250-SL Solar MPPT Charge Controller

– 250VDC input MPPT charge controller
– 12VDC-72VDC battery charging output
– Controller 40-62Amp output
– Simplified graphics and menu
– Integrated ground fault protection

The Open Circuit Voltage (Voc) is based on operating voltage plus the battery voltage, called the HyperVOC zone. You will not require a hub for stacking Classics to act as one larger controller. It features two auxiliary outputs, a dry contact relay, and a 12V output. Each unit includes snap-on covers and hole plugs for sealing openings in dusty or salt-air environments. Keep in mind that about a 20% reduction in production will result when used in sealed mode.

Use Midnite Solar Sizing Tool to help you design your system:

There Are Two Classic Charge Controllers

Midnite Solar offers two series of Classic MPPT charge controllers: the Classic and the Classic SL. Both models come in 150, 200, or 250 volts DC. The Classic is the complete model, while the Classic SL is a simplified version with fewer features. Below you can read more about the characteristics of each model.

The Classic

The Classic is a feature-rich charge controller designed by Midnite Solar. The Standard Classic features:
– 2 auxiliary outputs
– 1 auxiliary input
– Hyper VOC Extended VOC Limit
– Compatible with solar, wind, and hydro systems
– Ground fault protection
– Arc fault protection
– Graphics display
– Works with My Midnite and Local App (free firmware upgrades)
– Multiple display support
– Enabled for internet connectivity
– Five-year warranty

The Classic SL

Since most Classic controllers have been installed in solar PV systems, Midnite Solar makes the SL charge controllers. This simplified version is programmed to operate exclusively with solar PV systems.
Some of the advanced features found in the Classic have been removed from the SL units to reduce the cost of the controller further. The Classic SL does not feature:
– Compatibility with wind and hydro energy systems
– Arc fault protection
– Internet connectivity



MidNite Solar

MidNite Solar is an American manufacturing company that produces a wide range of alternative energy products. They started by making disconnect boxes for the alternative energy industry; later on they became a leading renewable energy manufacturer with the launch of the well known Classic series of Maximum Power Point Tracking (MPPT) charge controllers. MidNite offers a full line of pre-wired, battery based systems for standalone off grid, battery based grid tie, as well as AC coupled battery backup installations providing a wide range of solutions for residential and commercial projects. MidNite Solar is the largest manufacturer of DC combiner boxes in the US, their boxes and enclosures are made in Arlington, WA and meet all NEC requirements. Additionally they offer full range of Surge Protection Devices (SPD), wiring enclosures, breaker boxes and a full line of DC and AC breakers commonly used in renewable energy systems.

Midnite Classic SL MPPT Datasheet


Datasheet for Midnite Solar Classic Solar-Only MPPT Charge Controller

Classic Charge Controller Dimensions


Dimensions of the Classic MPPT Charge Controller

Midnite Solar Classic SL Manual


Midnite Solar Classic SL charge controller user and installation manual