Schneider Conext MPPT 150/70 Tr Solar Charge Controller

The Schneider Electric Conext MPPT 150/70 Tr is a 4200 W solar charge controller providing 70 A of charging current into a 12 V, 24 V, or 48 V battery bank from PV strings with open-circuit voltage up to 150 V, combining high efficiency maximum power point tracking with a transformer-isolated output that provides galvanic isolation between the PV array and battery bank — a safety feature required in IEC 62109-2 compliant solar system installations and particularly valuable in salt-atmosphere coastal environments where PV module insulation degradation over time can create earth leakage paths between the array and battery negative. The transformer isolation also eliminates common-mode noise coupling from the PV array into the battery system, improving battery state-of-charge measurement accuracy for lithium battery management systems.

The MPPT 150/70 Tr's two independent PV inputs each track a separate PV string, enabling mixed-orientation or partially-shaded array configurations to be harvested more efficiently than single-input controllers, recovering up to 20% more energy from practical roof or ground-mount array geometries. The unit is part of Schneider's Conext ecosystem and communicates with XW+ hybrid inverters and SCP system control panels via the Xanbus network, enabling centralised system management and monitoring. Its operating temperature range of -20°C to +60°C and passive cooling design ensure reliable 24/7 operation in Saudi Arabia's extreme desert climate without the fan-reliability concerns of forced-air-cooled designs.

In Saudi Arabia, the MPPT 150/70 Tr is preferred over the non-isolated MPPT 150/85 in applications where transformer isolation is specified by the project engineer or where the PV array is mounted on a conductive structure — metal roofing, aluminium ground-mount frames, or steel building structures — that creates a potential ground fault path requiring galvanic isolation between the array and the battery system. Off-grid agricultural solar systems at date palm farms in Al-Ahsa, and solar-powered telecoms sites in the Empty Quarter region, specify transformer-isolated MPPT controllers where ground fault protection cannot be reliably achieved by array design alone.

Razz Middle East stocks both the transformer-isolated MPPT 150/70 Tr and the non-isolated MPPT 150/85 to provide technical selection between isolation topologies based on the project's earthing scheme and installation requirements. We provide complete off-grid solar system design, MPPT controller sizing, and commissioning for agricultural, telecom, and remote infrastructure projects across Saudi Arabia.