MidNite Solar Classic 200-SL MPPT Charge Controller, 79A, 12-72V, 200VDC

The MidNite Solar Classic 200-SL MPPT Charge Controller is a streamlined MPPT solar charge controller rated for 200VDC PV input and up to 79A output, built for solar-only charging across 12–72V battery banks. Designed and assembled in the USA, it delivers the same core power and HyperVOC technology as the standard Classic line in a simplified, solar-focused package — with a straightforward menu structure that makes setup faster and ETL listing for both the US and Canada.

Key specifications

• Max PV input voltage — 200VDC; HyperVOC extends effective VOC to 248VDC at a 48V battery
• Max output current — 79A at 12V; 78A at 24V; 55A at 48V; 43A at 72V battery
• Battery voltage — 12–72V nominal; regulation set points 10–100VDC
• Built-in protection — DC Ground Fault Protection (resettable, no fuse to blow); fully protected against PV and battery reverse polarity, over-voltage, and short circuit
• Certifications & warranty — ETL listed to UL1741 & CSA (US & Canada), CE Certified, FCC Class B; 5-year warranty

High efficiency across wide battery voltages

Most MPPT controllers compromise between PV string size and battery bank voltage. The Classic 200-SL achieves 98% power conversion efficiency across its full 12–72V battery range, keeping harvest losses minimal whether the system runs at 24V or 48V. Its built-in DC Ground Fault Protection is resettable and requires no fuse replacement — a practical advantage on installations where access for maintenance is limited.

Key Applications

• Off-grid residential solar — charges 24V, 48V, and 72V battery banks at up to 78A, 55A, and 43A respectively, accommodating larger panel arrays and longer string runs made possible by the 200VDC input rating.
• Remote cabins and rural properties — the simplified menu and solar-focused feature set make it well suited to standalone PV systems where setup simplicity and long-term reliability matter most.
• Cold-climate installations — HyperVOC safely accommodates the elevated open-circuit voltages that occur on cold mornings without tripping or requiring a derated array.
• Positive-ground systems — fully supported with two-pole input and output breakers for RV, marine, and specialty wiring configurations.

HyperVOC, solar MPPT, and data logging

• HyperVOC — MidNite Solar's proprietary input extension adds the battery voltage to the 200VDC ceiling, allowing effective PV open-circuit voltages up to 248VDC at a 48V battery — a real-world safety buffer for cold-morning voltage spikes on larger strings.
• Solar MPPT mode — the tracking algorithm is optimized for PV arrays, extracting maximum power across varying irradiance and temperature conditions throughout the day.
• 380-day data logging — 380 days of daily history plus 24 hours of 5-minute interval data stored on-board, accessible via the built-in graphical display or through the included MNGP remote display.
• Battery temperature compensation — automatic when a MidNite Battery Temperature Sensor (MNBTS) is connected, with adjustable mV per degree C per 2V cell for accurate charge profiling across seasons.

Wiring, communications, and system integration

The Classic 200-SL communicates via Modbus over RS232. The MNGP graphical display is included standard with a 3-foot networking cable and can be relocated using a standard 4-conductor phone cable — no hub required, and a second display can be added. Terminals accept 75°C (167°F)-rated conductors. Conduit entries include single 1-inch (25.4mm) knockouts on both sides and two ¾-inch (19.05mm) knockouts on the back. The environmental rating is indoor Type 1 (IP30); adding the Classic Drip Shield upgrades protection to IP22 for damp locations. Two programmable auxiliary outputs handle external load disconnect and reconnect. The Classic 200-SL runs in parallel with other Classic SL, Standard Classic, and Classic Lite units via the Stacking/Follow-Me feature using standard phone cable.

Why choose the MidNite Solar Classic 200-SL?

The MidNite Solar Classic 200-SL MPPT Charge Controller offers the full output power and HyperVOC capability of the standard Classic 200 in a solar-focused design that trades the arc fault detector and Ethernet port for a lower price point and a simpler menu that reduces commissioning time on straightforward PV installations. The 200VDC input rating allows longer string runs and larger arrays than a 150V controller, while the same compact footprint and wiring interface keep it a natural fit for any Classic-compatible installation. The MNGP graphical display ships standard — not as an add-on — and the 5-year warranty, ETL listing for the US and Canada, and domestic design and assembly remain unchanged.