MidNite Classic 150-SL

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ATTENTION: Please Read this cover letter

BEFORE installing the Classic-SL

For help with the Classic, Classic Lite or Classic-SL please see

our how to videos and extended documentation. Please visit

this website: www.midnitesolar.com/classic

Before calling tech support, we recommend visiting this

website for some of the most common issues.

DANGER OF DEATH TO YOUR CLASSIC

Warning with Tigo modules Solar Mode must not be used or the Classic will not survive.

MidNite does not recommend the use of Tigo Module Optimizers with the Classic. If

Tigo modules must be installed Legacy P&O MUST be used.

When the Classic is used with Wind or Hydro a Clipper type device will most likely be

needed to protect against over voltage. A battery based diversion load WILL NOT keep

the Classic safe from over voltage. High input voltage is recorded and over voltage is not

covered under warranty.

Never hook a Pump or other load to the Input side of the Classic. If a Load must be

hooked to the input side of the classic the load and Classic need to have blocking diodes

on them.

Main Page

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Summary

DANGER OF DEATH TO YOUR CLASSIC

Critical Safety Warnings

Key warnings regarding Tigo modules, over-voltage, and load connections for Classic units.

Installation Guidelines and Safety Instructions

General Safety Guidelines

Covers warnings, cautions, and routine maintenance for safe installation and operation of the charge controller.

DC System Grounding and Wiring

Details on DC system grounding, GFP requirements, and basic wiring considerations.

DC and Battery-Related Installation Requirements

Personal Precautions During Installation

Essential safety guidelines for handling batteries and electrical components during installation.

Classic SL Power Graphs & Sizing the Solar Array

Understanding Power Graphs

Mounting the Classic SL

Mounting Arrangements

Wiring the Classic SL

Wiring Safety Hazards

Critical warnings about shock hazards and specific wiring compliance requirements for the Classic SL.

DC Terminal Connector and Wire Sizing

DC Terminal Connector Specifications

Wire Size Requirements

Current Ratings and Protection

Classic Current Ratings

Over Current Protection

Battery Temperature Compensation

Battery Temperature Sensor Installation

Grounding Procedures

Chassis Grounding

Guidelines for connecting the Classic chassis to ground, including wire gauge recommendations.

DC System Grounding

Explanation of how the Classic interacts with negative, positive, or ungrounded DC systems.

DC GFP (Ground Fault Protection)

Understanding and Using DC GFP

Details on the built-in Ground Fault Protection, its function, and reset procedures.

Controller Operation and Settings

Disabling GFP

Commissioning the Classic SL (Quick Start)

Battery Charge Stages and Meanings

Describes charge stages (Bulk, Absorb) and their meanings during the charging process.

Battery Charge Modes and Voltages

Float and Equalize Modes

Adjusting Charge Voltages

Advanced Settings and Calibration

Current Limit and Voltage Calibration

Troubleshooting and FAQs

Factory Restore Procedures

Steps for performing software and hardware factory restores to resolve issues.

Common Operational Issues

Solutions for common problems like no power, blank display, or incorrect readings.

Electrical Specifications

Specifications Mechanical

Classic Breaker Sizing