What is the round-trip efficiency of the KOSTAL Solar Electric HELIVOR HV 28.8 (9 modules)?

96 % (DC) (datasheet, zajadacz.de, read 28 Oct 2026). DC means the battery alone, without the inverter.

What warranty does the KOSTAL Solar Electric HELIVOR HV 28.8 (9 modules) have?

10 years (datasheet, zajadacz.de, read 28 Oct 2026). The warranty document's own terms decide which limit comes first.

Does the KOSTAL Solar Electric HELIVOR HV 28.8 (9 modules) include an inverter?

No. It is a battery without an integrated power conversion system, so it is paired with a separate battery or hybrid inverter (datasheet, zajadacz.de, read 28 Oct 2026).

How much does the KOSTAL Solar Electric HELIVOR HV 28.8 (9 modules) cost?

No public price listing was found for it when this database was compiled (28 Oct 2026). Zorowatt does not estimate prices.

KOSTAL Solar Electric

HELIVOR HV 28.8 (9 modules)

One tower with 9 x 3.2 kWh LFP modules (max per tower). Up to 8 towers in parallel via ZYC combiner box (230.4 kWh), on PLENTICORE inverters (max ~25 kW AC).

Made by ZYC Energy Company Limited (China) for KOSTAL (rebadged ZYC SIMPO HV per datasheet/compat list); KOSTAL provides service and warranty.

Short answer

The KOSTAL Solar Electric HELIVOR HV 28.8 (9 modules) is an LFP residential-class battery also sold for small commercial sites (as specified: One tower with 9 x 3.2 kWh LFP modules (max per tower). Up to 8 towers in parallel via ZYC combiner box (230.4 kWh), on PLENTICORE inverters (max ~25 kW AC)). Usable energy: 27.4 kWh. Max. discharge power: 28.8 kW. Round-trip efficiency: 96 % (DC). Warranty: 10 years.

Each figure is in the table below with its source and the day it was read.

Specifications

Spec	Value	Source
Chemistry	LFPOfficial KOSTAL datasheet DOC03862193 (10/2025) - copy hosted on distributor site	zajadacz.deDatasheet · read 28 Oct 2026
Usable energy	27.4 kWhAt 95% DoD; datasheet also gives 28.8 kWh at 100% DoD	zajadacz.deDatasheet · read 28 Oct 2026
Nominal energy	28.8 kWh'Nutzbare Kapazitaet 100% DoD 28,8 kWh' = 9 x 3.2 kWh modules	zajadacz.deDatasheet · read 28 Oct 2026
Max. discharge power	28.8 kWderived, as charge	zajadacz.deDatasheet · read 28 Oct 2026
Max. charge power	28.8 kWderived: 50 A max continuous x 576 V nominal (DC); actual limited by PLENTICORE inverter	zajadacz.deDatasheet · read 28 Oct 2026
C-rate	1 Cderived: 50 A / 50 Ah	zajadacz.deDatasheet · read 28 Oct 2026
Round-trip efficiency	96 % (DC)'Zykluswirkungsgrad >=96 %' (battery)	zajadacz.deDatasheet · read 28 Oct 2026
Depth of discharge	95 %Datasheet gives usable capacity at both 100% and 95% DoD; 95% used here	zajadacz.deDatasheet · read 28 Oct 2026
Cycle life	unavailableNot in datasheet.	Not published
Warranty	10 years'10 Jahre KOSTAL Garantie'	zajadacz.deDatasheet · read 28 Oct 2026
Warranty cycles	unavailable	Not published
Warranty throughput	unavailable	Not published
Capacity at end of warranty	unavailable	Not published
Nominal voltage	576 VRange 540-657 V	zajadacz.deDatasheet · read 28 Oct 2026
Operating temperature	−20 to 55 °C; charging −10 to 55 °C	zajadacz.deDatasheet · read 28 Oct 2026
Dimensions (W × D × H)	610 × 240 × 2,000 mm	zajadacz.deDatasheet · read 28 Oct 2026
Weight	348 kg	zajadacz.deDatasheet · read 28 Oct 2026
Ingress protection	IP65	zajadacz.deDatasheet · read 28 Oct 2026
Integrated inverter (PCS)	No, battery only	zajadacz.deDatasheet · read 28 Oct 2026
Scalability	2-9 modules per tower; 1-8 towers in parallel: 6.4-230.4 kWh	zajadacz.deDatasheet · read 28 Oct 2026
Certifications	CE, IEC 62619, UN 38.3, VDE-AR-E 2510-50	zajadacz.deDatasheet · read 28 Oct 2026
Compatible inverters	KOSTAL PLENTICORE G3, KOSTAL PLENTICORE MP G3, KOSTAL PLENTICORE BI 25 G3, KOSTAL PLENTICORE plus G2, KOSTAL PLENTICORE BI xx/26 G2From KOSTAL 'Released batteries for PLENTICORE' 07/2026 (DOC02048988-0037), copy hosted on distributor site; firmware from G3 SW 3.06.03 / G2 SW 2.21; parallel towers need ZYC combiner SCB3-50 / SCB8-50	photovoltaik4all.deDatasheet · read 28 Oct 2026

Datasheetzajadacz.deversion DOC03862193 · dated 2025-10 · read 28 Oct 2026

photovoltaik4all.de · Plenticore Freigegebene Batterien.pdf

Notes

Included as the only non-BYD battery on KOSTAL's PLENTICORE release list that is marketed for commercial use ('private, gewerbliche und industrielle Anwendungen', up to 230 kWh). Other non-BYD entries (AXITEC AXIstorage, BMZ Hyperion, Dyness Tower/Stack100, LG RESU FLEX, Pylontech Force, VARTA.wall, ZYC SIMPO HV) are residential. kostal-solar-electric.com download URLs returned 404, so both documents were read from distributor-hosted copies of the official KOSTAL PDFs.

Sold in: DE, EU

Prices

No public price listing was found when this database was compiled (28 Oct 2026). Zorowatt does not estimate prices.

Questions

How much usable energy does the KOSTAL Solar Electric HELIVOR HV 28.8 (9 modules) store?: 27.4 kWh (datasheet, zajadacz.de, read 28 Oct 2026), for this configuration: One tower with 9 x 3.2 kWh LFP modules (max per tower). Up to 8 towers in parallel via ZYC combiner box (230.4 kWh), on PLENTICORE inverters (max ~25 kW AC).
What is the round-trip efficiency of the KOSTAL Solar Electric HELIVOR HV 28.8 (9 modules)?: 96 % (DC) (datasheet, zajadacz.de, read 28 Oct 2026). DC means the battery alone, without the inverter.
What warranty does the KOSTAL Solar Electric HELIVOR HV 28.8 (9 modules) have?: 10 years (datasheet, zajadacz.de, read 28 Oct 2026). The warranty document's own terms decide which limit comes first.
Does the KOSTAL Solar Electric HELIVOR HV 28.8 (9 modules) include an inverter?: No. It is a battery without an integrated power conversion system, so it is paired with a separate battery or hybrid inverter (datasheet, zajadacz.de, read 28 Oct 2026).
How much does the KOSTAL Solar Electric HELIVOR HV 28.8 (9 modules) cost?: No public price listing was found for it when this database was compiled (28 Oct 2026). Zorowatt does not estimate prices.

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