Renogy Monitoring Screen for Smart Lithium Battery Series

The Renogy Monitoring Screen for Smart Lithium Battery Series is a wall-mounted backlit LCD display that reads state of charge, voltage, current, capacity, remaining time, and warning codes directly from the battery management system (BMS) of compatible Renogy Smart LiFePO4 batteries (no shunt required). Compatible batteries include the Renogy 48V 50Ah Smart Lithium Battery, 12V 100Ah Smart Lithium Battery with Self-Heating Function, and 12V 100Ah Smart Lithium Battery.

BMS-Direct Accuracy Without a Shunt

Traditional battery monitors estimate state of charge by measuring current through a shunt, a method that accumulates error over time and requires periodic calibration. The Renogy Monitoring Screen communicates directly with the battery's built-in BMS over an RS485 connection instead. Because the BMS already tracks cell-level data with precision, the displayed state of charge, voltage, and current reflect what the battery actually knows about itself rather than a calculated approximation. For anyone deciding when to run loads or when to start charging, that accuracy removes guesswork from the equation.

Parallel Bank Support Built In

The monitoring screen handles parallel battery banks without additional hardware beyond CAT5 or above Ethernet straight-through cables between the batteries' RS485 LINK and RS485 UP ports (cables not included). Once the batteries are daisy-chained and the monitoring screen is connected to the RS485 UP port on the first battery using the included RJ45 cable, the screen displays charging and discharging status for the entire bank, the number of paralleled batteries, and the average state of charge across them. Adding batteries to the bank later does not require replacing or reconfiguring the monitor.

Simple Installation, Minimal Footprint

At 2.76 x 4.33 x 1.25 inches and 0.14 lbs, the monitoring screen mounts to any flat surface using the four included self-tapping screws. The snap-fit front cover plate removes for installation and reattaches without tools. The included 16.4 ft (5m) RJ45 communication cable provides enough reach to position the screen at eye level on a wall or cabinet face while the batteries sit below. Power comes from the battery bank at 12VDC, drawing less than 1W, so no separate power wiring is needed. The backlit LCD auto-dims after 15 to 25 seconds of inactivity.

Features

• BMS-direct monitoring: reads SoC, voltage, current, capacity, remaining time, and parallel battery count via RS485 with no shunt needed
• 9 warning codes: displays straightforward codes for abnormal conditions and improper operation
• Parallel bank support: monitors charging and discharging across a parallel LiFePO4 bank with inter-battery RS485 communication
• Battery shelf mode: hold the Power Button for 3 seconds to switch the battery or bank to shelf mode and preserve charge during storage
• Wall-mount design: four self-tapping screws and a 16.4 ft RJ45 cable included; snap-fit cover plate requires no tools
• Auto-off display: backlit LCD turns off after 15 to 25 seconds of inactivity; draws less than 1W

Specifications

Who This Is For and Isn't

The Renogy Monitoring Screen suits owners of the Renogy 48V 50Ah Smart Lithium Battery, 12V 100Ah Smart Lithium Battery with Self-Heating Function, or 12V 100Ah Smart Lithium Battery who want a dedicated wall-mounted display showing real-time BMS data (state of charge, voltage, current, remaining time, and warning codes) for a single battery or a parallel bank in an RV, van, cabin, truck, or marine installation.

The monitoring screen does not work with non-Renogy batteries or third-party LiFePO4 batteries of any brand. Renogy Smart LiFePO4 batteries purchased before April 15, 2020 may have compatibility issues with this screen. CAT5 or above Ethernet straight-through cables needed to link batteries in a parallel bank are not included.

Common Questions

Does this monitoring screen work with non-Renogy or third-party LiFePO4 batteries?

The Renogy Monitoring Screen for Smart Lithium Battery Series is not compatible with non-Renogy batteries or third-party LiFePO4 batteries of any kind. It communicates exclusively via the RS485 BMS interface built into the Renogy 48V 50Ah Smart Lithium Battery, 12V 100Ah Smart Lithium Battery with Self-Heating Function, and 12V 100Ah Smart Lithium Battery.

Will the display stay on continuously and drain the battery?

The monitoring screen's backlit LCD turns off automatically after 15 to 25 seconds of inactivity, and the unit draws less than 1W during normal operation. Pressing the Page Up or Page Down button wakes the display to show current readings. For extended storage, holding the Power Button for 3 seconds switches the battery or bank to shelf mode to preserve charge.

How does the monitoring screen indicate that a battery is fully charged?

The monitoring screen displays battery level using four segments representing real-time charge level relative to capacity. While charging, the segments illuminate one by one in a repeating sequence until the battery reaches full charge. In a parallel bank, the display shows the average charge level across all batteries in the bank.

What cables are needed to monitor a parallel battery bank?

To monitor a parallel bank, CAT5 or above Ethernet straight-through cables (not included) must connect the RS485 LINK port of each battery to the RS485 UP port of the next battery in the chain. The included 5m RJ45 communication cable then connects the monitoring screen to the RS485 UP port on the first battery. The screen displays charging and discharging status and the average state of charge for the entire bank.