Deye SUN-XL02-B700W PV module optimiser with monitoring and rapid shutdown, IP68

Overview

SUN-XL02-B is the communicating version of Deye's module optimiser. Like the -A it tracks the maximum power point of one module of up to 700W, 80V and 15A, at 99.5% peak efficiency, but it also talks over the PV cables by power-line communication. Together with Deye's optimizer concentrator, which manages up to 4 strings of up to 25 modules, it adds real-time monitoring of every module and a rapid-shutdown function. It suits roofs with shading or mixed orientations where module-level data and safe DC shutdown are wanted.

• 700W, 80V, 15A per PV module
• 12–80V MPPT range, 99.5% peak efficiency
• IP68, -40…+85°C, MC4 connectors
• -B: power-line communication over PV cables
• -B: module monitoring and rapid shutdown with concentrator
• Full or partial installation on mismatched modules

How it works

Each optimiser is fixed to the module frame, takes the module output on its input leads and runs its own maximum power point tracking between 12 and 80V. The outputs of all optimisers in a string are connected in series and go to the string inverter or combiner box as usual. Deye states that module-level MPPT can raise yield by 5–25% where modules are shaded, differently oriented, aged or soiled. Ratings are 700W, 80V and 15A, with 99.5% peak efficiency.

Key features

SUN-XL02-A is the plain optimiser, without communication. SUN-XL02-B adds power-line communication over the existing PV cables, so no data wiring is needed, plus real-time monitoring of every module and a rapid-shutdown function that brings the array DC voltage down to a safe level. Deye notes that these three -B functions are available only together with its optimizer concentrator. Both versions use an IP68, double-insulated housing of 105×105×22mm rated for -40 to 85°C.

Installation and compatibility

The manual describes full installation on every module of an MPPT input, which corrects both series and parallel mismatch, or installation only on clearly mismatched modules or strings to save cost. Leads are 4.0mm² with MC4 or MC4-compatible connectors, 70cm on the input and 100cm on the output. Connect the input before the output, and check each string with a multimeter before connecting it to the inverter.

For the -B system, the concentrator handles up to 4 strings of up to 25 modules, within 350m of the strings. It has built-in Wi-Fi and is powered by the supplied DIN-rail power supply, or from the RSD port of an inverter with rapid-shutdown function. Deye recommends keeping PV and AC cables more than 10cm apart and the optimiser-to-inverter cables as short as possible. Both versions carry CE marking.

Questions and answers