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SAJ BU2-5.0-HV1
SAJ Battery System

SAJ BU2-5.0-HV1

SAJ BU2-5.0-HV1 is the 5 kWh battery module of the B2 HV1 stack: 32S1P, 102.4 V / 50 Ah, 50.5 kg.

  • 96% depth of discharge on every B2/BU2 module size, 5.0 to 25.0 kWh nominal per stack.
  • Stack 1 to 5 BU2 modules behind one BC2-HV1 control unit for up to 25.0 kWh on H2/HS2, or up to 8 BU3 modules for up to 40 kWh on HS3.
  • IP65-rated enclosure for wall- or ground-mounted outdoor installation.
  • CAN communication to the host inverter, natural convection cooling — no active thermal management to maintain.
4.5 kWh
Usable energy
5.0 kWh
Nominal energy
102.4 V
Nominal voltage
LiFePO4
Cell chemistry
Manufacturer
SAJ
Model code
BU2-5.0-HV1
Item no.
DLK-SAJ-BU250HV1
Delivery
Germany delivery estimate: EUR 85–205 · The final delivery charge is included in your Proforma.
Orderable · lead time confirmed after order

Plan with BU2-5.0-HV1

New system, extension or replacement? Linker Advisor starts from this article and asks only for what is still open — existing model, quantity, postcode, installation date.

Trade price
Sign in for partner pricing Download datasheet

Figures transcribed from the manufacturer datasheet on file. Confirm your grid code and configuration with our engineers before ordering.

  • GoodWe · SAJ · Pylontech · EcoFlow · Chint paired from the maker’s own lists
  • Datasheets on file for every item
  • Within 24 h engineering response
  • MOQ 1 unit · EU delivery
  • Engineering-checked configurations
Size it to the load. Grow it later.
Capacity logic

Size it to the load. Grow it later.

4.8 kWh per stack today; add modules when the load grows instead of guessing on day one.

96% depth of discharge on every B2/BU2 module size, 5.0 to 25.0 kWh nominal per stack.
Stack 1 to 5 BU2 modules behind one BC2-HV1 control unit for up to 25.0 kWh on H2/HS2, or up to 8 BU3 modules for up to 40 kWh on HS3.
IP65-rated enclosure for wall- or ground-mounted outdoor installation.
Module electrical
Headline feature

Module electrical

32S1P LFP configuration at 102.4 V / 50 Ah; 5.0 kWh rated and 4.8 kWh usable per module in the B2 system tables.

In pictures

Inspect it before you spec it.

Official renders, installation photos and system panels for this model line.

Official manufacturer render.
Product

Official manufacturer render.

SAJ B2 battery tower built from BU2 modules, official render
Product

SAJ B2 battery tower built from BU2 modules, official render

SAJ B2 battery shown at three stack capacities, manufacturer render
Product

SAJ B2 battery shown at three stack capacities, manufacturer render

Documentation

Specifications

Every value exactly as published in the official BU2-5.0-HV1 documentation.

TypeHigh-voltage battery module, B2 Series (HV1)
Cell configuration32S1P
Cell typeLiFePO4
Module voltage (V)102.4
Module capacity (Ah)50
Rated energy per module (kWh)5.0
Usable energy per module (kWh)4.8
Max. charge current (A)30
Max. discharge current (A)30
Dimension per module (H x W x D mm)261 x 626 x 365
Weight (kg)50.5
Ingress protection (system)IP65
Operating temperature rangeCharging 0 ~ 50 C; discharging -10 ~ 50 C
Cooling methodNatural convection
Full datasheet (PDF) Ask an engineer

Documents

SAJ B2 HV1 / HV5 Series high-voltage battery datasheet (AU, EN)ENDownload
Missing a certificate or language version?Request a document
ProductSAJ BU2-5.0-HV1
Approved pairings

What this unit is approved to run with.

Every pairing below traces to a manufacturer compatibility list, by document version and date. A pairing only one maker lists is marked; we quote it, an engineer confirms it.

SAJ CH3-100K-T8 SAJ CH3-100K-T8 Item no. DLK-SAJ-CH3100KT8 On SAJ's compatibility list SAJ CH3-110K-T8 SAJ CH3-110K-T8 Item no. DLK-SAJ-CH3110KT8 On SAJ's compatibility list SAJ CH3-125K-T8 SAJ CH3-125K-T8 Item no. DLK-SAJ-CH3125KT8 On SAJ's compatibility list SAJ CH3-75K-T6 SAJ CH3-75K-T6 Item no. DLK-SAJ-CH375KT6 On SAJ's compatibility list SAJ CH3-80K-T6 SAJ CH3-80K-T6 Item no. DLK-SAJ-CH380KT6 On SAJ's compatibility list SAJ CH3-99.9K-T8 SAJ CH3-99.9K-T8 Item no. DLK-SAJ-CH3999KT8 On SAJ's compatibility list SAJ H2-15K-T3 SAJ H2-15K-T3 Item no. DLK-SAJ-H215KT3 On SAJ's compatibility list SAJ H2-20K-T3 SAJ H2-20K-T3 Item no. DLK-SAJ-H220KT3 On SAJ's compatibility list

Pick the rating

SAJ family. Same engineering, different size.

2 ratings Same series, same engineering — your model is highlighted.
SAJ BU2-5.0-HV1 This model Sign in for pricing
SAJ BU2-5.0-HV5 Sign in for pricing
Usable energy
Same across the family: 4.5 kWh
Nominal energy
Same across the family: 5.0 kWh
Nominal voltage
Same across the family: 102.4 V
Cell chemistry
Same across the family: LiFePO4
Max. charge current
Same across the family: 30 A
Max. discharge current
Same across the family: 30 A
Ingress protection
Same across the family: IP65
Weight
50.5 kg
52.5 kg

Every figure comes straight from the manufacturer's official datasheet.

Configuration 3

Match the variant the installed system already uses: the B2 HV1 family (B2-5.0-HV1 to B2-25.0-HV1) takes the BU2-5.0-HV1, and the B2 HV5 family takes the BU2-5.0-HV5.

  • Electrically identical: the B2 datasheet prints the same values for both, 102.4 V, 50 Ah, 5.0 kWh rated and 4.8 kWh usable, 30 A charge and discharge limits.
  • Weight: the HV1 module weighs 50.5 kg, the HV5 module 52.5 kg.
  • Decision rule: SAJ states no further difference in this datasheet, so the variant already in the stack or named in the project documents decides the order code.

Each module adds 5.0 kWh rated and 4.8 kWh usable at 102.4 V nominal, and a B2 stack runs one to five modules under one BC2-HV1 control module.

  • Full stack: five modules give 5 x 5.0 kWh = 25 kWh rated, the printed ceiling for the B2 HV families.
  • Host platform: the B2 HV series serves SAJ's H2 and HS2 hybrid inverters; HS3 systems use the different BU3-5.0-TV2-PRO module instead.
  • Current limits: 30 A maximum charge and discharge per the module rating.

No. The BU2 module is the battery building block only; every B2 stack needs one BC2-HV1 control module, listed separately at de-linker.

  • New stack: order one BC2-HV1 plus one to five BU2 modules of the matching variant.
  • Expansion: a stack that already runs a BC2-HV1 accepts further modules up to the five-module ceiling.
  • Communication: the B2 system communicates with the host inverter over CAN, per SAJ's system datasheet.

Availability & compliance 1

Yes. The module carries UN 38.3 within the B2 certification set, and one module is one carton position of 5 kWh.

  • Certification list: IEC 62619 for cell and pack, EN 62477-1 and EN 61000-6-1/-2/-3/-4, per SAJ's B2 datasheet.
  • Carton mass: 50.5 kg for the HV1 module, 52.5 kg for the HV5.
  • Grid paperwork: the datasheet names no grid-connection certificate for the module, so confirm the certificate set for your market, including any German requirement, with the quote.

Installation & wiring 1

Each module measures 261 x 626 x 365 mm and weighs 50.5 kg (HV1) or 52.5 kg (HV5); the assembled B2 stack is rated IP65 at system level.

  • Temperature: charging is rated for 0 to 50 C, discharging for -10 to 50 C.
  • Cooling: natural convection, so there are no fans to wire or service.
  • Cell base: 32 series-connected LiFePO4 cells (32S1P) at 102.4 V and 50 Ah per module.

General 1

The B2 datasheet prints identical electrical values for both module variants.

  • Weight: the HV1 module weighs 50.5 kg per 5 kWh step
  • Other specs: SAJ states no further difference in this datasheet

Match the variant your system already uses.

Next step

Send the project. Hear from an engineer within 24 hours.

Loads, tariff, site constraints - our engineers reply with a compatibility check and a sizing recommendation.

Contact project support

Or write to linker01@de-linker.com — attach your load profile if you have one.