AKAIYAI RackMaster Pro A51R100-B 5.12kWh 51.2V Lithium Battery

AKAIYAI RackMaster Pro A51R100-B – 5.12kWh Modular Lithium Battery for Solar & ESS SystemsAKAIYAI RackMaster Pro A51R100-B is a 51.2 V, 100 Ah rack-style lithium module delivering 5.12 kWh per unit for residential and light-commercial energy storage systems (ESS). As part of KAIYA’s RackMaster Pro line, this battery focuses on high cycle life, easy integration with hybrid inverters, and quick, low-maintenance installation in standard equipment racks.With 6000 cycles and excellent round-trip efficiency, the RackMaster Pro helps lower the lifetime cost of storage while keeping more of your solar energy usable. Its robust metal enclosure (IP20), quiet natural-convection cooling, and BMS (16S100A) protections make it a dependable core for solar self-consumption, backup power, and time-of-use optimization.Integration is straightforward. The battery supports CAN, RS485, and RS232, enabling closed-loop operation with many popular hybrid inverters for accurate SOC reporting, safe charge limits, and optimized performance. Recommended charge is 20 A (max 50 A), with a CC 0.5C 56.8 V / CV 58.4 V profile, while discharge supports 100 A continuous (50 A recommended) with a 44.8 V cut-off. These settings, combined with precise control from compatible inverters, help protect cell health and sustain capacity over time.The RackMaster Pro is built for practical installs. At 420×440×132 mm and ≈43.5 kg, it fits neatly in rack/cabinet spaces, uses M5 terminals for secure connections, and requires minimal service. Thanks to low self-discharge (<3%/month), systems stay ready even after extended standby periods. Charge in environments from -10 °C to 55 °C and discharge from -20 °C to 55 °C; store between 0 °C and 30 °C in a clean, dry area.Scalability is simple. Start with one 5.12 kWh module and parallel up to 16 units to reach ≈40 kWh, expanding as loads grow—without redesigning your system. This flexibility suits homes and SMEs alike: keep essential loads (lighting, Wi-Fi, refrigeration, POS) online during outages; shift energy from off-peak to on-peak periods; and capture more daytime PV to use at night.Use casesSelf-consumption of solar energy with evening/night usageBackup power for essential loads during grid outagesTime-of-use shifting to reduce bills where TOU tariffs applyScalable retrofits adding storage to existing PV systemsSmall commercial/edge sites needing clean, quiet storageInstaller tipsUse closed-loop profiles over CAN/RS485 where available for safest charging and accurate SOCSize DC cabling and protective devices to current and run length; observe local codesInstall indoors in a ventilated, clean, dry space; keep within operating temperature rangesFor best life, avoid chronic 100%/0% SOC extremes; follow the recommended charge currentTechnical SpecificationsParameterValueModelA51R100-B (RackMaster Pro)Nominal Voltage51.2 VCapacity100 AhEnergy5120 Wh (25 °C, 0.2C)Internal Resistance≤10 mΩ @50% SOCCycle Life≥6000 cycles (typ.)Monthly Self-Discharge<3%Charge ModeCC 0.5C 56.8 V / CV 58.4 VRecommended Charge Current20 AMax Charge Current50 ACharge Cut-off Voltage58.4 VDischarge – Continuous100 A (recommended 50 A)Discharge Cut-off Voltage44.8 VCharge Temperature−10 °C ~ 55 °CDischarge Temperature−20 °C ~ 55 °CStorage Temperature0 °C ~ 30 °CIngress ProtectionIP20Cell & Method3.2 V 100 Ah 16S1PCaseMetal, rack-mountDimensions (L×W×H)420 × 440 × 132 mmWeight≈43.5 kgTerminalM5CommunicationRS485 / RS232 / CANBMS16S100AParallel CapabilityUp to 16 unitsDownload Datasheet | For manufacturer details, see the official page: AKAIYAI RackMaster Pro A51R100-B