Simpliphi 3.8 kWh LFP Battery, 48V - PHI-3.8-48-60 -
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Simpliphi 3.8 kWh LFP Battery, 48V | PHI-3.8-48-60 | Off-Grid Lithium Solar Battery

SKU PHI-3.8-48-60

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Simpliphi 3.8 kWh LFP Battery, 48V | PHI-3.8-48-60 | Off-Grid Lithium Solar Battery + FREE Lifetime After-Sale Support

The PHI 3.8™ kWh 60 Amp deep-cycle Lithium Ferro Phosphate (LFP) battery is optimized with proprietary cell architecture, power electronics, BMS and assembly methods. It is modular, light- weight and scalable for installations that range from kWh to MWh. Provides power security and seamless integration of renewable and traditional sources of energy in conjunction with or independent of the grid: net zero, peak shaving, emergency back-up, portable and mobile.


  • Lithium Ferro Phosphate (LFP) The safest Lithium Ion chemistry available. No cobalt, risk of thermal runaway or fire
  • Built-in Battery Management System
  • Built-in SB50 Anderson Connector
  • Compatible with all industry standard inverters and charge controllers
  • Maintenance-free. No ventilation, cooling or thermal regulation required


SKU PHI-3.8-48-60
Weight 108.0000
Ah Rating 75
Battery Voltage 48
Dimensions (inchs) 13.5 x 14 x 8
Standard Warranty 10 years or 10,000+ cycles @ 80% DOD
Manufacturer Simpliphi

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1 Review
Reviewed by Andrew S., from United States
I recommend this product
Rated 5 out of 5
Review posted

Welcome to the Future

Fast charging, long-lasting, heavy duty batteries. Just two of them is enough to keep my house running all night (~200 Wh) without dropping below about 60%. And charging them up the next day at 2 kWh or so only takes about 3 hours. The occasional draw-surge from a refrigerator kicking in or such will dim the output voltage a bit for a third of a second or so, but won't show a noticeable hit on the battery's voltage.

For the most part, these batteries will hang around the 52/53 volt range under normal minor draws. This can definitely confuse battery monitors that are designed for non-lithium batteries, as the curve is practically flat. Make sure to read all the manuals SimpliPhi provides, put a breaker on the connection between the batteries and the rest of your system to prevent amperage in AND out from being too high (the batteries are rated at C/2 for their maximum both in and out, so 37.5A per battery max). For two batteries, I went with a 60A breaker with a steep trip curve (B, or C at worst) so that its 125% "must-trip" value would be 75, then limited my charge controllers and inverter to around 55 maximum DC output. Read the warranty PDF for details about sizing battery banks to match your inverter and charge controller, but definitely think about keeping a breaker on the wire just to be absolutely safe.

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