Renogy RBT50LFP48S-AU User manual

48V 50Ah
Version 2.0
Battery
SMART LITHIUM IRON PHOSPHATE

SAFETY INSTRUCTIONS
DO NOT puncture, drop, crush, burn, penetrate, shake, or strike the battery.
Please keep the battery away from water, heat sources, sparks, and hazardous chemicals.
DO NOT open, dismantle, or modify the battery.
DO NOT short-circuit the battery terminals. Doing so can cause current bursts and lead to
irreversible damage to the system and the battery.
Please verify the polarity before connecting the wiring. Reversing polarity can and will
destroy the battery.
Please secure all cable connections to the proper specification in order to ensure good
contact between the cable lugs and the terminals. Over-tightening cable connections can
cause terminal breakage and loose cable connections can cause terminal meltdown or fire.
Please avoid too high a voltage difference between paralleled batteries, despite the
auto-balancing function, to avoid triggering the over-current protection.
ONLY charge the battery with a battery charger or charge controller that is compatible with
lithium iron phosphate batteries.
DO NOT exceed the maximum charge and discharge current to the battery.
If the battery shuts off due to low state of charge (SoC), please disconnect the battery from
the discharge equipment to eliminate potential parasitic loads and recharge the battery as
soon as possible. Failure to do so may cause irreversible damage to the battery.
DO NOT string batteries in series. Doing so can cause catastrophic failure.
ONLY connect batteries of the same manufacturer and model in parallel.
It is recommended to pair the battery with discharge equipment featuring low voltage
disconnect in the system.
DO NOT discharge the battery at high temperatures above 140 (60 ).
Please charge the battery at least once every 3~6 months for maintenance and to prevent
over-discharge. Long periods of storage can lead to deterioration of battery performance.

SAFETY INSTRUCTIONS
The battery leaves the factory in shelf mode. To switch the battery to active mode, please
long press the Power Button for 1 second. The LED Indicator will illuminate after 1~2
seconds of software initialization to indicate that the battery has been successfully switched
to active mode. Please check the battery voltage to validate an active battery.
Prior to long periods of storage, please disconnect the battery from the system and long
press the Power Button for 3 seconds to switch the battery to shelf mode. The LED Indicator
will go out to indicate that the battery has been switched to shelf mode. In shelf mode, the
battery has a low self-discharge rate and can hold the charge for a longer period of time.
LED Indicator
Power Button

LEDIndicator Battery Operation Status
Slow Flashing Green Standby
Fast Flashing Green Normal Discharging
Solid Green Normal Charging / Fully Charged
Flashing Yellow Battery Under-voltage Warning / Battery Cell Under-voltage Warning
Solid Yellow Charge Over-current Warning / Discharge Over-current Warning
Flashing Red Battery Under-voltage Protection /
Battery Cell Under-voltage Protection / Battery Over-voltage Protection
Solid Red
Charge Over-current Protection / Discharge Over-current Protection /
Battery High Temperature Protection /
Battery Low Temperature Protection / Short Circuit Protection
The LED Indicator indicates the battery operation status. Please refer to the following table
for more details.
The battery leaves the factory with the self-heating function enabled. To disable the
self-heating function, please switch the battery to shelf mode and long press the Power
Button for 8 seconds. The LED indicator will flash red, yellow, and green 3 times
respectively* to indicate that the self-heating function has been disabled. To re-enable the
self-heating function, please repeat the previous steps. The LED indicator will flash red,
yellow, and green in sequence for 3 times** to indicate that the self-heating function has
been re-enabled. The battery will switch to active mode automatically after disabling or
re-enabling the self-heating function. When the self-heating function is disabled, the LED
indicator will flash red, yellow, and green 3 times respectively* every time the battery is
switched to active mode.
The normal operation of the self-heating function requires a stable charge current greater
than 3A for each battery in the parallel battery bank. The self-heating function will start
operating automatically once the battery temperature drops below 41 (5 ) and stop
operating automatically once the battery temperature rises above 50 (10 ).

* Red-Red-Red-Yellow-Yellow-Yellow-Green-Green-Green
** Red-Yellow-Green-Red-Yellow-Green-Red-Yellow-Green
The self-heating function needs to be disabled or enabled individually on each battery in the
parallel battery bank. Please make sure to disable or enable the self-heating function
uniformly on all the batteries in the parallel battery bank.
It is not recommended to connect more than 8 batteries in parallel if taking advantages of
the auto-balancing function.
Please leave the battery in shelf mode during installation. DO NOT switch the battery to
active mode until making sure all the connections are correct and secure. Connecting active
batteries to the system may trigger the short circuit protection of battery.
Paralleled batteries can be switched to active mode simultaneously by charging them or
using the Power Button on any battery. To switch paralleled batteries to shelf mode, please
disconnect them and use the Power Button to switch each battery to shelf mode.
The self-heating function will not be able to operate normally if a PWM charge controller or
a small current battery charger is used to charge the battery at low temperatures. It is
recommended to disable the self-heating function to prevent it from starting and stopping
operation frequently and consuming the battery.

TROUBLESHOOTING
If the Power Button is not able to switch the battery to active mode or the battery resting
voltage is under 41.62V in active mode at room temperature, the battery may have been
severely over-discharged due to self-discharge or parasitic loads. Please revive the battery
using a battery charger or charge controller with the lithium battery activation function.
If the battery terminal voltage shows 0V in active mode, the battery internal fuses may have
blown due to severe over-current. Please contact us for assistance.
If the battery voltage gets too low to reliably power electric loads or triggers the battery
under-voltage protection, please disconnect the battery from electric loads and charge the
battery as soon as possible.
If the battery temperature gets too high/low during the operation and triggers the battery
high/low temperature protection, please disconnect the battery from the charging source
and electric loads and cool down/warm up the battery to room temperature. The battery will
automatically recover from the battery high/low temperature protection.
If too high a current passes through the battery and triggers the charge/discharge
over-current protection, please disconnect the battery from the charging source/electric
load immediately. The battery will automatically recover from the charge/discharge
over-current protection after 1 minute. If the charge/discharge over-current protection is
triggered 3 times in a row, the battery will no longer recover automatically. Please
discharge/charge the battery with a current greater than 1A to recover the battery from the
charge/discharge over-current protection.
If the battery is short circuited and triggers the short circuit protection, please remove the
short circuit immediately and charge the battery with a current greater than 1A to recover
the battery from the short circuit protection.

SPECIFICATIONS
50Ah
48V
42V~55.5V
50A
54V
32 ~131 / 0 ~55
-4 ~140 / -20 ~60
-13 ~149 / -25 ~65
14 ~77 / -10 ~25
4500 Cycles (80% DOD)
Parallel
IP55
22.7 x 8.5 x 7.9 inch / 576 x 215 x 200 mm
61.7 lb. / 28.0 kg
M8 x 1 x 20 mm
LiFePO4Cell Type
Maximum Charge/Discharge Current
Charge Voltage
Charge Temperature Range
Discharge Temperature Range
Storage Temperature Range
Cycle Life (0.2C, 25 )
Connection Method
Dimension
Weight
Long Replacement Terminal Bolts
Recommended Storage Temperature
Protection Rating
Rated Capacity (0.2C)
Nominal Voltage
Voltage Range

Renogy reserves the right to change
the contents of this manual without notice.
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