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Sunsynk
Sunsynk X Series 5.1kWh 51.2V Lithium Battery

Sunsynk X Series 5.1kWh 51.2V Lithium Battery

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$971.20at SustainableChecked Nov 11

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Price facts

  • Last seen at $971.20 at Sustainable on Nov 11.

Our take on the Sunsynk X Series 5.1kWh 51.2V Lithium Battery

The Sunsynk X Series is a 51.2V lithium iron phosphate (LiFePO4) home battery rated at 5.12kWh, built for solar self-consumption and backup power with hybrid inverters. It stands out for a high 95% depth of discharge, over 6000 cycles, an integrated BMS, and IP65 protection, so it can go indoors or in a sheltered outdoor spot. It scales to eight units in parallel for larger homes or light commercial sites, and talks to inverters over CAN and RS485. It suits owners who want a compact wall- or floor-mounted battery that pairs with Sunsynk hybrid inverters; rival 5kWh LiFePO4 packs are similar in capacity, so the choice usually comes down to inverter compatibility and monitoring.

Best forHomeowners adding battery backup to a hybrid solar systemOff-grid or grid-tied solar self-consumptionLight commercial backup powerInstallers scaling storage with parallel units
Pros
  • LiFePO4 chemistry is safer and longer-lived than older lithium types
  • Over 6000 cycles and up to 95% depth of discharge
  • Scales to eight batteries in parallel
  • Integrated BMS with CAN and RS485 communication
  • IP65 enclosure allows protected outdoor mounting
  • Compact wall-mounted or floor-standing install
Cons
  • Optional Wi-Fi monitoring is an add-on, not standard
  • Best integration is with compatible Sunsynk hybrid inverters
  • Parallel expansion needs correct cabling and BMS setup
  • No built-in inverter; it is storage only

Sunsynk X Series 5.1kWh 51.2V Lithium Battery prices at every store

  • SustainableNew

    In stockShips from South Africa · priced in ZAR (ZAR 16,086.91) · duties may applyReturn policy

    $971.20Checked Nov 11
    Visit Sustainable

About the Sunsynk X Series 5.1kWh 51.2V Lithium Battery

The Sunsynk SUN-X-5.12-F is a lithium iron phosphate (LiFePO4) battery for residential and light commercial energy storage. It stores 5.12kWh and works with compatible solar and hybrid inverter systems for solar self-consumption, backup power and off-grid installations.

It has an integrated battery management system (BMS) and communicates over RS485 and CAN. Wi-Fi monitoring is optional. Up to 8 batteries can be connected in parallel, with 3 or fewer in parallel recommended.

The enclosure is IP65-rated, so the battery suits indoor and protected outdoor locations. It can be mounted on a wall or placed on the floor.

Model
SUN-X-5.12-F
Chemistry
LiFePO4
Nominal energy
5.12kWh
Nominal capacity
100Ah
Rated voltage
51.2Vdc
Voltage range
43.2Vdc to 57.6Vdc
Max current
50A charge, 100A discharge
Depth of discharge
Up to 95%
Cycle life
More than 6000 cycles at 25°C
Parallel use
Up to 8 units; 3 or fewer recommended
Communication
RS485, CAN, optional Wi-Fi
Dimensions
420 × 140 × 650mm (W × D × H)
Weight
46kg
Installation
Wall-mounted or floor-standing
Protection rating
IP65
Protective class
Class I
Charge temperature
-10°C to 50°C
Discharge temperature
-20°C to 50°C
Humidity
5% to 95% RH, non-condensing
Max altitude
Below 2000m
Certifications
IEC62619, CE, UN38.3, RoHS
Warranty
5 years or 10 years, depending on the final installation site of the inverter

Questions and answers

How much usable energy does it store?
It is rated at 5.12kWh with up to 95% depth of discharge, so roughly 4.8kWh is usable per unit. That covers a few hours of essential loads in a typical home.
Can I add more batteries later?
Yes. Up to eight units can run in parallel, so you can start with one and expand. Parallel setups need matched units and correct cabling.
Does it work with my inverter?
It communicates over CAN and RS485 and is designed for compatible solar and hybrid inverters, especially Sunsynk hybrids. Check your inverter's supported battery list before buying.
Can it be installed outdoors?
The IP65 enclosure suits indoor use and protected outdoor locations. It should not be exposed to direct rain or flooding.
Is Wi-Fi monitoring included?
Wi-Fi monitoring is optional, not built in. You need the add-on module to view battery data remotely.
What chemistry does it use?
It uses lithium iron phosphate (LiFePO4), which is known for thermal stability and long cycle life. Sunsynk rates it at over 6000 cycles.
Where is the Sunsynk X Series 5.1kWh 51.2V Lithium Battery cheapest?
At Sustainable, for $971.20, as of our latest check.

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