Product rating: 5/5 (2x)

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AC Nominal Output (W): 5,500
Max. Output Power (VA): 5,500
DC input voltage range (V): 120-650
Frequency (Hz): 50
Dimensions (mm): 563 x 405 x 233
Weight (kg): 17.9
Protection Class (-): 1
Degree of protection (-): IP65

KOSTAL PLENTICORE BI 5.5/26 is a retrofit inverter provided with KOSTAL AC retrofit battery inverter, 26A/5.5kW, including Activation code, Input for connecting the BYD BBOX Premium HVS/HVM.


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Availability: In stock

Producer: KOSTAL Solar Electric GmbH


KOSTAL PLENTICORE BI 5.5/26 is a retrofit inverter provided with KOSTAL AC retrofit battery inverter, 26A/5.5kW, including Activation code, Input for connecting the BYD BBOX Premium HVS/HVM, charge/discharge 26A Display, data logger, plant monitoring, certified for DACH.

For the installation, Seam fixing clamps are required for attaching SolidRail to pitched or snap seam roofs. An M10 adapter plate (2002544) is required for rail mountin according to article K2. Material: clamp: aluminum; Screws: stainless steel A2 - Smart power - Smart connection - Easy installation - 5-year warranty after registration in the KOSTAL Solar webshop - Charging power depends on the battery voltage. Maximum charging current: 26A.

A Kostal smart energy meter is required for commissioning.


Technical Data

      • Rated power : 5.5kW
      • Max. apparent output power: 5.5kVA
      • Rated output current: 7.94A
      • Rated Frequency: 50Hz
      • Rated input voltage: 120 ... 650 V
      • Maximum efficiency Bat2AC: 96.6%
      • Maximum efficiency AC2Bat: 96.8%
      • Ambient temperature: -20°C ... +60°C
      • Degre of protection: IP65
      • Protection Class: 1
      • Dimensions (H x W x D): 563 x 405 x 233mm
      • Weight: 17.9kg
      • Optional warranty extension for (years): 5/10/15



      • Ideal for retrofitting existing PV systems
      • Compatible with the high voltage battery Battery Box Premium HVM/ HVS by BYD
      • Application range for single-family homes to commercial


Smart performance

      • Fast, self-learning shadow management – adapts individually to the installation site
      • Dynamic active power control and 24-hour home-consumption measurement
      • Self-learning generation and consumption forecast – for optimum self-consumption
      • Low conversion losses due to DC coupling and high-voltage battery
      • Prepared for additional battery charge via AC energy sources

Smart connected

      • Smart Communication Board – future proof, new functions can be added via the integrated Web Application
      • Display, data logger, system monitoring, network and control interfaces integrated as standard, WLAN Ready via external USB WLAN adapter
      • Free Solar Portal for monitoring the PV system
      • Smart Home integration

Easy to install

      • Simple device configuration using commissioning wizard
      • Safe installation due to clearly arranged, separate terminal compartment and protected power electronics
      • Compatible with RCD type A
      • Auto update and remote support


Compatible Energy storage batteries

      • BYD Battery-Box Premium HVS
      • BYD Battery-Box Premium HVM 11.0
      • BYD B-Box HV



CE, GS, IEC62109-1, IEC62109-2, EN60529, DIN VDE 0126-1-1:2013-08, VDE AR-N4105:2018, VDE AR-N4100:2018, TOR Erzeuger, ÖNORM E8001-4-712/A2:2016, NA/EEA-CH 2014, IEC62116:2014.





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