Knowledge Base › Battery Control Units
Dyness Tower BDU control module (ES-BC-EU)
Verified distributor global (EN documentation) verified Sept. 2, 2026
Identity
| category | battery_control_units |
| ean | UNKNOWN |
| generation | UNKNOWN |
| hardware_revision | UNKNOWN |
| legacy_name | UNKNOWN |
| manufacturer | Dyness (Dyness Digital Energy Technology Co., LTD) |
| market_version | EN |
| model | Tower BDU control module (ES-BC-EU) |
| mpn | ES-BC-EU |
| product_family | Dyness Tower (T7-T21) system components |
| product_status | UNKNOWN |
| product_status_detail | current |
| product_status_evidence | Stocked and listed by the EU distributor 7SUN (57 units in stock) as of 2026-09-02; the Tower series it serves has a live official product page. |
| region | global (EN documentation) |
| release_year | UNKNOWN |
| sku | UNKNOWN |
| subcategory | battery control unit / BDU for a stacked high-voltage battery tower (stack BMS + DC breaker + external DC terminals + inverter communication port) |
| variant_note | CONTROL UNIT only - no stored energy. The part designation 'ES-BC-EU' comes from the 7SUN distributor listing 'Control module - DYNESS - BDU - ES-BC-EU'; it is not printed in the fetched Dyness user manual. Pairs with 2-6 HV9637 modules to form a Tower T7/T10/T14/T17/T21. |
Electrical
| cell_chemistry | UNKNOWN |
| cell_type | UNKNOWN |
| continuous_charge_current_a | 18.5 |
| continuous_discharge_current_a | 18.5 |
| continuous_power_kw | UNKNOWN |
| cycle_life | UNKNOWN |
| depth_of_discharge_pct | UNKNOWN |
| max_charge_current_a | 37 |
| max_charge_power_kw | UNKNOWN |
| max_discharge_current_a | 37 |
| max_discharge_power_kw | UNKNOWN |
| max_parallel_units | 12 |
| max_series_units | 6 |
| modules_per_tower_max | 6 |
| modules_per_tower_min | 2 |
| nominal_capacity_ah | UNKNOWN |
| nominal_energy_kwh | NOT APPLICABLE - control unit, stores no energy |
| nominal_voltage_v | UNKNOWN |
| operating_voltage_max_v | 657 |
| operating_voltage_min_v | 168 |
| parallel_supported | True |
| peak_charge_current_a | UNKNOWN |
| peak_discharge_current_a | UNKNOWN |
| peak_power_kw | UNKNOWN |
| round_trip_efficiency_pct | UNKNOWN |
| series_supported | True |
| system_energy_max_kwh | 21.31 |
| system_energy_min_kwh | 7.1 |
| usable_energy_kwh | NOT APPLICABLE - control unit, stores no energy |
Physical / mechanical
| color | UNKNOWN |
| cooling_method | UNKNOWN |
| depth_mm | UNKNOWN |
| enclosure_material | UNKNOWN |
| height_mm | UNKNOWN |
| installation_notes | 7SUN lists the control module weight as 25.5 kg. Its dimensions are not published separately; the tower footprint is 504 x 380 mm. |
| ip_rating | IP54 (tower system level) |
| mounting_type | mounted on top of the stacked HV9637 modules |
| rack_units | UNKNOWN |
| shipping_weight_kg | UNKNOWN |
| weight_kg | 25.5 |
| width_mm | UNKNOWN |
Installation
| indoor_outdoor | installed at the top of the tower stack, inside the tower enclosure |
| notes | Mandatory: exactly one control unit per tower, plus a base at the bottom of the stack. It stores no energy - all energy figures belong to the battery modules and to the assembled tower system. |
| parallel_hub_required | False |
Environment
| indoor_outdoor | inside the tower enclosure (IP54) |
| max_altitude_m | UNKNOWN |
| operating_humidity | UNKNOWN |
| operating_temperature_charge_max_c | UNKNOWN |
| operating_temperature_charge_min_c | UNKNOWN |
| operating_temperature_discharge_max_c | UNKNOWN |
| operating_temperature_discharge_min_c | UNKNOWN |
| operating_temperature_max_c | UNKNOWN |
| operating_temperature_min_c | UNKNOWN |
| pollution_degree | UNKNOWN |
| storage_humidity | UNKNOWN |
| storage_temperature_max_c | UNKNOWN |
| storage_temperature_min_c | UNKNOWN |
Interfaces & connectors
| bluetooth | UNKNOWN |
| can | True |
| communication_ports | 'EXT-CAN/RS485' RJ45 to the inverter; 9-pin BDU port to the module stack; parallel ports for multi-cluster |
| dry_contact | UNKNOWN |
| ethernet | UNKNOWN |
| modbus_rtu | UNKNOWN |
| modbus_tcp | UNKNOWN |
| protocol_notes | EXT-CAN/RS485 pinout: PIN1 Orange/White 485_A, PIN2 Orange 485_B, PIN3 Green/White Reserved, PIN4 Blue CANH, PIN5 Blue/White CANL, PIN6 Green CANIN, PIN7 Brown/White CANOUT, PIN8 Brown NC. BDU port definition: 1 Negative output, 2 Positive output, 3 SWAKE, 4 SCANSG, 5 SCANL, 6 SCANH, 7 24V-, 8 24V+, 9 SCANOUT. |
| rs232 | Datasheet-level 'CAN/RS485/RS232' claim; only CAN/RS485 pins are documented on the EXT port |
| rs485 | True |
| usb | UNKNOWN |
| wifi | UNKNOWN |
Protection
| fire_suppression | UNKNOWN |
| notes | Tower manual protection chapter requires a 30-minute wait before resetting a tripped DC breaker. |
| overcurrent | Integrated DC breaker (master switch / short-circuit protection) |
Certifications
| emc_certifications | CE-EMC |
| safety_certifications | IEC62619 / IEC63056 / IEC62477 / IEC62040 / IEC60730 / VDE2510-50 / UL1973 / UKCA |
| standards | UN38.3/CE-EMC/IEC62040/IEC62619/IEC62477/IEC60730/IEC63056/UKCA/CEC Accredited/UL1973/VDE2510-50 (quoted at Tower system level) |
| transport_certifications | UN38.3 |
Warranty & service
| conditions | UNKNOWN |
| summary | 7SUN distributor listing: 'Warranty: 10 years'. |
| years | 10 |
Documents
compatibility_list
List of the Inverter Brands Compatible with Dyness Tower Series, last updated 06/05/2025 - distributor mirror on vanmeenen.com
rev 250506
datasheet
{# Located but never retrieved: listed, but deliberately not linked, and it
backs no stored value. #}
Dyness Tower datasheet EN 2025-04-22 (TowerDatasheetEN20250422-281.pdf) - official, linked from the Tower product page — located, not retrieved
rev 2025-04-22
datasheet
Dyness Tower datasheet-EN V1.0-20230704 - distributor mirror on estsolar.lt
rev V1.0-20230704
retailer_article
ONSA Plus retailer blog: 'The Dyness Tower is ending: move to Tower Pro and Stack' (published 30.06.2026)
rev UNKNOWN
Additional documented parameters
Recorded verbatim from the source; no schema field exists for these yet.
| 7SUN distributor internal SKU / EAN | SKU F12B2, EAN 2010000029497 (20-prefix restricted-circulation code, distributor internal barcode) |
| 7SUN listed price | 327.33 EUR gross |
| Base (separate mandatory item) | Tower base 504 x 380 x 186 mm, counted separately from the modules and the BDU. NOTE: this dimension is carried over from the existing ANMA canonical Tower T14 record (a prior agent's reading of the same Tower 1.5g user manual); it was NOT returned by this session's fetch of that manual, so treat it as unconfirmed in this batch. |
| WAKE signalling | 'SWAKE' pin on the BDU port and composite connectors |
| identity.product_status | current |
| manufacturer_legal_entity_as_printed | Dyness Digital Energy Technology Co., LTD |