Phoenix RLR-5.1-X1 Rack 51.2V 100Ah Lithium Battery Price in Pakistan

The Phoenix RLR-5.1-X1 is a rack-style 48V lithium battery: 51.2V nominal, 100Ah and 5.12 kWh, the classic 5kW lithium battery size. A rack module is shaped to slide into a battery cabinet or sit in a stack, which keeps a multi-battery install tidy and easy to service. The LiFePO4 cells need no water, are safer than NMC, and give about 90% usable depth of discharge.

Backup at common loads: two fans, lights and a fridge (about 300W) run for about 14 hours. Four fans, eight LED lights and a TV (about 450W) run for about 9 hours. A 1-ton inverter AC with a fan and lights (about 920W) runs for about 5 hours.

It suits 48V hybrid and off-grid inverters such as Growatt, Inverex, Knox, Fronus and Deye. Set the battery type to lithium or a LiFePO4 user profile, and check the datasheet for BMS communication and for how many modules can run in parallel. The compatibility guide (Which Lithium Battery Works With My Inverter?) covers both. Plan a cabinet or rack in a dry indoor room; no IP rating is listed.

Phoenix sells two 48V models in this group. The RLR-5.1-X1 Rack is 100Ah and 5.12 kWh. The RLW-5.4-X1 Wall is 105Ah and 5.37 kWh, so it holds about 5% more energy, mounts on the wall and lists 5,000+ cycles. Pick the rack if you want a cabinet install or plan to add modules later in one stack. Pick the wall model if you have one battery and want it off the floor. Phoenix has not published a cycle figure or warranty period for the rack model, so ask us for the terms before you order.

Rack batteries are a good choice when you expect to grow. A family might start with one 5.12 kWh module today and add a second one next summer when an AC is added to the backup. If you plan this, buy the same model so voltages and BMS settings match, and leave space in the cabinet for the next module. The installer should also size the cables and breaker for the final number of modules, not just the first one. Keep a note of the purchase date for each module.

Compare all 5kW batteries (5kW Lithium Battery) or see the Phoenix range (Phoenix Lithium Battery prices).

Battery

Brand

Phoenix

Model

RLR-5.1-X1 Rack

Chemistry

LiFePO4 (lithium iron phosphate)

Nominal voltage

51.2V

Capacity

100Ah

Energy

5.12 kWh

Usable energy (90% DoD)

about 4.6 kWh

Capacity class

5kW (5.12 kWh)

Life & warranty

Cycle life

As per maker datasheet

Warranty

Brand warranty (ask before ordering)

Design

Mounting

Rack / cabinet module

Battery management

Built-in BMS

Compatibility

Inverter type

48V inverters, UPS and solar systems

Communication

CAN / RS485 (check your inverter list)

Origin

Brand origin

Pakistani brand, China-made cells