Pylontech US3000C 3.55kWh 48V battery3.55kWh 48V LiFePO4 rack battery with integrated BMS

Overview

The US3000C is a 48V lithium iron phosphate module of 3.552kWh, 3.37kWh usable at 95% depth of discharge, in a 19-inch case of 442×420×132mm and 32kg. Recommended current is 37A, with 74–89A for one minute and up to 200A for 15 seconds, and several modules in parallel add up their current. Up to 16 units form one group, and up to four can be stacked in Pylontech brackets. It is also the usual way to extend existing US2000 or US3000 banks.

• US3000C: 3.55kWh, 37A recommended current
• US5000: 4.8kWh, 100A continuous current
• Up to 16 modules in one group
• CAN and RS485, automatic addressing in groups
• 19-inch rack or stacking brackets
• IP20, for indoor installation

How it works

Each US module is a self-contained 48V lithium iron phosphate battery with its own BMS, sized to fit a 19-inch rack. Modules are connected in parallel, never in series, so capacity and current add up while the voltage stays at 48V nominal. One group can hold up to 16 modules; several groups are linked over RS485 directly or over CAN through Pylontech's LV-Hub.

The first module in a group acts as master and talks to the inverter. Generations can be mixed: with a US5000 as master, US3000C or US2000C modules can follow in positions two to sixteen, and with a US3000C as master, older US3000 and US2000 units can occupy positions two to eight. Pylontech recommends using the newest unit of a type as master.

Key features

The US3000C stores 3.55kWh and handles 37A recommended, 74–89A for 60 seconds and up to 200A for 15 seconds. The US5000 stores 4.8kWh and delivers 100A continuous, 105–119A for 15 minutes and 120–200A for 15 seconds. Both allow 95% depth of discharge with inverters following Pylontech's current protocol, include soft-start for inverter inrush and dual active protection in the BMS, and accept firmware updates from the inverter via CAN or RS485.

Installation and compatibility

The modules are IP20 and belong in a dry, dust-free room between 0°C and 50°C, best at 10–40°C, at least 2m from heat sources and 0.5m from inverter air outlets, out of direct sun. They mount in a cabinet, a rack or Pylontech stacking brackets: up to four US3000C or three US5000 per bracket stack. Each external cable pair carries 100A constant, and a DC breaker of at least 60V, type C or D, is recommended.

Pylontech's low-voltage compatibility list includes the US5000 with Victron MultiPlus and Quattro via Venus OS, SMA Sunny Island, Studer Xtender, Schneider Conext XW Pro, Solis, Deye, GoodWe and many other 48V inverters, giving the communication type and verified firmware for each. Check the US3000C with Pylontech for the specific inverter.

Questions and answers