The Victron BlueSolar MPPT 150/70-Tr is a solar charge controller built for off-grid and battery charging installations. It accepts a maximum PV open-circuit voltage of 150V and delivers up to 70A of charge current, suiting medium-to-large battery banks where efficient solar harvest matters. Installers use it on caravans, boats, off-grid cabins and commercial battery storage systems.

Key features

• Input voltage, maximum PV open-circuit voltage of 150V, allowing series-connected panel strings without a step-down transformer.
• Charge current, 70A maximum output, charging 12V, 24V and 48V battery banks.
• MPPT tracking, true Maximum Power Point Tracking finds the optimal operating point of the PV array, including under partial shading or variable irradiance.
• Connections, Tr variant uses screw terminals, suited to permanent field-serviceable wiring.
• Battery compatibility, works with flooded lead-acid, AGM, gel and lithium batteries (with appropriate BMS).
• Communication, VE.Direct port for monitoring via a GX device or the VictronConnect app, with optional Bluetooth via a VE.Direct Bluetooth Smart dongle.

Product overview

This model sits in Victron's BlueSolar range, which does not include built-in Bluetooth, unlike the SmartSolar series. It suits installations where remote monitoring runs through a GX device such as a Cerbo GX, or where a wired VE.Direct connection is preferred. The 150V maximum input gives flexibility when designing PV strings, particularly with 60-cell or 72-cell panels in series.

Battery voltage is detected automatically on first connection across 12V, 24V and 48V systems. The Tr designation refers to the screw terminal connection type, the standard choice for fixed installations where cables are terminated once and left in place. The unit weighs 3.88kg and is intended for wall or panel mounting in a sheltered enclosure or indoor location.

Applications

• Off-grid cabins and rural properties with 12V, 24V or 48V battery banks.
• Marine and narrowboat solar charging systems needing a higher-voltage PV input.
• Motorhome and large vehicle installations with multiple panels wired in series.
• Commercial and agricultural off-grid systems integrated with a Victron GX monitoring device.
• Backup power setups alongside a generator or inverter-charger.

What's in the box

• 1 x Victron BlueSolar MPPT 150/70-Tr charge controller

Installation notes

Fit this unit only if qualified to do so. String design must keep open-circuit voltage under the 150V limit even in cold conditions, which can raise Voc above standard test values. Wire and fuse the DC circuit in line with BS 7671 and the relevant IET Wiring Regulations.