Power Optimizers

Solar power optimizers for photovoltaic systems

A power optimizer is a DC/DC device fitted to each individual module that tracks its maximum power point independently. One shaded panel no longer drags down the whole string, so output stays consistent on roofs with mixed orientation, chimneys, trees or localised soiling.

Why add module-level optimizers

  • Higher yield: per-module MPPT recovers 20-30% on partially shaded arrays.
  • Panel-level monitoring: spot the underperforming module without climbing on the roof.
  • Safety: rapid DC shutdown of string voltage for emergencies and maintenance.
  • Design freedom: mix orientations, tilts and string lengths.

Our range

We stock Huawei Smart PV optimizers for SUN2000 inverters: SUN2000-450W-P2 for standard residential modules, plus MERC-600W-P and MERC-1100W-P for high-power panels and commercial arrays. All units are new, officially warranted and ready to ship from our warehouse near Rome, Italy.

How to choose

Check three module figures: peak power (Pmax), open-circuit voltage (Voc) and short-circuit current (Isc). The optimizer input rating must match or exceed panel Pmax, with a compatible voltage window. Unsure about string sizing? Our technical desk replies within 24 hours.

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Huawei SUN2000-450W-P2 Optimizer 450 W MC4 | MR WATT
Huawei SUN2000-450W-P2 Optimizer 450 W MC4
Huawei SUN2000-450W-P2 power optimizer for systems with Huawei SUN2000 inverters: it makes every panel work at its own maximum power point, independently of the others.450 W input, MC4 connectors, 99.5% peak efficiency. Drops output to 0 V when the inverter shuts down (rapid shutdown) and enables module-level monitoring in FusionSolar.
€46.69 Tax escl.
SolarEdge S440 440W IP68 MC4 Optimizer | MR WATT
SolarEdge S440 440W IP68 MC4 Optimizer
SolarEdge S440 power optimizer (SES440-1G-M4M-RM) for one photovoltaic module up to 440 W rated, increased to 490 W for installations after 1° April 2024.MPPT at individual module level, maximum efficiency 99,5%, maximum input voltage 60 Vdc, MC4 connectors, IP68 rating, and automatic voltage shutdown to 1 V according to VDE-AR-E 2100-712. 25-year warranty.
€46.05 Tax escl.
SolarEdge S500B Optimizer 500W Voc 125V | MR WATT
SolarEdge S500B Optimizer 500W Voc 125V
SolarEdge S500B power optimizer for photovoltaic modules up to a nominal 500 W, increased to 650 W on installations after 1° April 2024.It is the high-voltage version of the S series: maximum Voc 125 Vdc, MPPT 12,5-105 V, output up to 80 V. Allows minimum strings of 6 modules on single-phase inverters. MC4 connectors, IP68, 25-year warranty.
€63.81 Tax escl.
SolarEdge S500 500W IP68 MC4 Optimizer | MR WATT
SolarEdge S500 500W IP68 MC4 Optimizer
SolarEdge S500 power optimizer (SES500-1G-M4M-RM) for one photovoltaic module up to 500 W rated, increased to 550 W for installations after April 1, 2024.Maximum efficiency 99.5%, maximum input voltage 60 Vdc, MPPT 8-60 V, MC4 connectors, IP68 rating and 1 V safety voltage according to VDE-AR-E 2100-712. 25-year warranty.
€58.57 Tax escl.
SolarEdge P601 Power Optimizer 600W MC4 | MR WATT
SolarEdge P601 Power Optimizer 600W MC4
SolarEdge P601-4RM4MBN power optimizer for one high-power PV module up to 600 W, with per-module MPPT tracking and up to 99.5% peak efficiency.
MC4 connectors, IP68 rating and automatic module-level voltage shutdown for installer and firefighter safety. 25-year warranty.
€81.75 Tax escl.
SolarEdge S650B Optimizer 650W Voc 85V | MR WATT
SolarEdge S650B Optimizer 650W Voc 85V
SolarEdge S650B-1GM4MBM power optimizer: the flagship model of the residential S series, for one photovoltaic module up to 650 W nominal.Maximum input voltage 85 Vdc, MPPT 12,5-85 V, 99,5% efficiency, 15 A output current, 2,3 m output cable, curved bracket, IP68 rating, and 1 V safety voltage. 25-year warranty.
€68.48 Tax escl.
SolarEdge P950 950W Optimizer for 2 Modules | MR WATT
SolarEdge P950 950W Optimizer for 2 Modules
SolarEdge P950 power optimizer from the commercial series: a single device for two modules connected in series, with 950 W input power and maximum voltage of 125 Voc. It halves the number of optimizers, cables, and installation hours on medium- and large-scale systems. Compatible only with SolarEdge SE16K and higher three-phase inverters. 2,2 m output cable, MC4 connectors, 25-year warranty.
€72.50 Tax escl.
Tigo TS4-A-O 700W Optimizer with Module Shutdown | MR WATT
Tigo TS4-A-O 700W Optimizer with Module Shutdown
Tigo TS4-A-O power optimizer for PV modules up to 700 Wp. An add-on unit that fits an already installed module and adds optimization, module-level monitoring and shutdown.
15 A maximum current, 16-80 V range, IP68 rating, MC4/EVO2 connectors. Clips onto the module frame — even on a single shaded panel.
€45.04 Tax escl.
Tigo CCA Kit with TAP and DIN Rail Power Supply | MR WATT
Tigo CCA Kit with TAP and DIN Rail Power Supply
Tigo Cloud Connect Advanced communication kit: includes the CCA data logger, the TAP (Tigo Access Point) and the DIN rail power supply. It is the hub that enables module-level monitoring and shutdown on TS4 optimizers.
Handles up to 900 TS4 devices and 7 TAPs, with internet connectivity over Ethernet or Wi-Fi and data on the Tigo Energy Intelligence platform.
€227.15 Tax escl.