Overview
JKBMS PB2A16S20P is an active-balance Inverter BMS designed for family/home energy storage battery packs using LiFePO4 / Li-ion / LTO, with support for inverter communication (RS485 by default; CANBUS/HEAT as customized options). It supports 7S to 16S battery strings (chemistry-dependent) and provides 2A (2000mA) active balancing with a 200A continuous charge/discharge rating. PB series inverter BMS orders placed after June 1, 2025 are set to V19 by default.
Key Features
- Active balance (Full State On): 2000mA (2A) balancing current
- Continuous current: 200A (continuous charge current 200A; continuous discharge current 200A)
- Peak discharge: 350A (MAX 2 min)
- Bluetooth built-in: supports Android / iOS phones
- Communications: RS485 (default); CANBUS/HEAT (customized)
- Common port wiring: same port / common port
- Protection functions: over charge, over discharge, over current, short circuit, all-in protection (cable drop/poor contact), over temp protection
- Smart energy working modes: Storage Mode, Normal Working Mode, Shutdown, Standby Mode (standby time setting: 1–30 days)
For installation support and after-sales service, contact https://tsolar.top/ or email service@tsolar.top.
Specifications
| Model | PB2A16S20P |
| Supported battery chemistries | LiFePO4 / Li-ion / LTO |
| Number of battery strings (Li-ion) | 7S–16S |
| Number of battery strings (LiFePO4) | 8S–16S |
| Number of battery strings (LTO) | 14S |
| Balance method | Active Balance (Full State On) |
| Balance current | 2A (2000mA) |
| Continuous charge current | 200A |
| Continuous discharge current | 200A |
| Maximum discharge current (MAX 2 min) | 350A |
| Over charge protection current (ADJ) | 10–200A |
| Conductive resistance in main circuit | 0.47mΩ |
| Power supply mode | The battery pack is self-powered |
| Wiring output | Common Port (same port) |
| Single cell voltage detection range | 0–5V, error <10mV over full operating range, typical error value <5mV |
| Single cell voltage range | 1–5V |
| Voltage acquisition accuracy | ±5mV |
| Supports single cell voltage dropout detection | Yes |
| Total voltage detection range | 0–100V, <0.5% FSR (FSR = full scale) |
| Current sense shunt | -150A to 300A, error <0.5% FSR |
| SoC estimation accuracy | Error <8% (operating conditions) |
| Battery remaining capacity accuracy | Error range is less than 8% |
| Total Cycle AH cumulative value | Half of the charge/discharge value |
| Operating power consumption | <5mA (without communication) / 15mA (485/CAN) |
| Standby power consumption | <2mA |
| Over charge protection voltage | 1.2–4.35V Adjustable |
| Over charge release voltage | 1.2–4.35V Adjustable |
| Over discharge protection voltage | 1.2–4.35V Adjustable |
| Over discharge release voltage | 1.2–4.35V Adjustable |
| Over current detect delay | 2–120S Adjustable |
| Temperature detection range | -40 to 125°C |
| Quantity of temperature detection | 4 pcs |
| Operating temperature | -40 to 85°C |
| Storage temperature | -40 to 95°C |
| Short circuit protection | Yes |
| Temp protection | Yes |
| Coulomb counter | Yes |
| Bluetooth function | Support for Android & iOS phone |
| Other interfaces (default) | RS485 |
| Other interfaces (customized) | CANBUS/HEAT |
| Size | 300*100*18mm |
Interfaces / Port Notes
- CANBUS: need customization (pins: GND, CAN_H, CAN_L)
- RS485: by default (pins: GND, RX, TX, VCC)
- LCD: by default (pins: K-, K+, GND, B, A, VCC)
- Heat Function: need customization
Bluetooth App Use
- Download the specified Bluetooth application and activate the BMS.
- Open the Bluetooth application and find the relevant serial number to check operating data.
Applications
- Home/family energy storage battery packs (LiFePO4 / Li-ion / LTO)
- Inverter energy storage systems requiring RS485 communication (e.g., Growatt, Deye, etc.)
Reference Information (Other JK BMS Item Shown in Materials)
- JK-BD6A17S6P: Active Balance BMS; active balance current 0.6A; adapt battery strings 10S–17S (LTO), 7S–17S (Li-ion), 8S–17S (Lifepo4); continuous discharge/charge current 60A; peak current 100A; battery strings 03–17S.
Details
Built for home energy storage packs, the inverter BMS combines active balancing with inverter communications for smarter system control.
Internal hardware layout highlights the layered PCB design and multi-connector wiring interface used on PB-series units.
RS485 is the default communication option; CANBUS and heat control are available as customized functions depending on the build.
Bluetooth monitoring provides live pack data, balance status, and cell-by-cell readings on iOS and Android.
Protection features cover overcharge/overdischarge, overcurrent and short circuit, plus cable/contact and temperature safeguards.
Smart energy modes support storage, normal operation, standby timing, and shutdown behavior for long-term idle periods.
Use the parameter table to confirm the correct model and string count for your battery chemistry before ordering.
