https://richsolar.com/products/all-in-one-ess 

Introducing the RICH SOLAR All-in-One Energy Storage System.

The RICH SOLAR All-in-One Energy Storage System is a powerful and efficient solar energy system designed to provide clean and reliable electricity. 

This innovative system integrates all the components required for solar power generation into a single, compact unit, including an inverter, batteries, and a charge controller.

- All In One Energy Storage System Specifications 
- Maximum PV Input Power 8000W 
- Rated Output Power 6500W 
- Maximum Charging Power 6500W 
- MPPT Range @ Operating Voltage 90 ~ 230 VDC
- Maximum PV Array Open Circuit Voltage 250 VDC 
- Maximum Solar Charge Current 120A 
- Number of MPP Trackers / Maximum Input Current 2 / 2 x 18 A 
- Nominal Output Voltage 120 VAC 
- System Dimension (D X W X H) 19.7″ x 26″ x 49.2″ 
- Net Weight 287 lb 

BATTERY 
- Nominal DC Voltage: 48 VDC 
- Maximum Charging Current: 120 A 
- Dimension: (D x W x H): 8.4″ x 24.4″ x 19.7″ 
- Net Weight: 99 lb Capacity: 5120Wh 
- Nominal Voltage: 51.2VDC 
- Full Charge Voltage(FC): 56V 
- Full Discharge Voltage(FD): 42V 
- Typical Capacity: 100 Ah 
- Max Continuous Discharging Current: 120A 
- Max Discharging Current: 192A at 1 min 
- Protection: BMS, Breaker 
- Float Charge Voltage: 52.5V 
- Charge Current: 20A (0.2C) 
- Maximum Charge current: 50A (0.5C) 
- Standard Charge method: 0.2C CC (Constant current) charge to FC, CV (Constant voltage FC) charge till charge current declines to <0.05C 
- Inner Resistance: ≤20m ohm 
- Pure sine wave output 
- Off-Grid application 
- Programmable supply priority for PV, Battery, or Grid 
- User-adjustable battery charging current 
- Battery independent design 
- Multiple communication for USB, RS232, SNMP, Modbus, GPRS and Wi-Fi 
- Monitoring APP (Android and iOS) for real-time status display and parameter control 
- Built-in 2 MPPT trackers and AC/Solar charger up to 120A 
- Compatible with utility and generator 
- Scalable Li-Ion battery expansion 

The compact design of an All-in-One Energy Storage System makes it an attractive option for those with limited space, or for those who want a more discreet installation. It can also be easier to install and maintain compared to larger energy storage systems, which may require more extensive wiring and infrastructure.