2.5-5.4kWh Batteries

Essential-backup 2.5-5.4kWh lithium batteries and rack modules from EG4, Fortress Power, Pytes, SimpliPhi and MK Battery. Start small and stack more capacity later.

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110 products

Top Sellers — Market Front-Runners The same Tier-1 lines as the big national players · live PES pricing
Top SellerTrina Solar Vertex N 600W N-Type TOPCon Commercial ModuleTrina Solar Trina Solar Vertex N 600W N-Type TOPCon Commercial Module $158.06 $0.26/W · 600WAvailable to orderLead time confirmed at checkoutTop SellerZNshine 400W ZXM7-SH108-400/M All Black Monocrystalline Solar PanelZNShine ZNshine 400W ZXM7-SH108-400/M All Black Monocrystalline... $136.86 $0.34/W · 400WIn stockShips in 1–2 business daysTop SellerZNShine Solar 405W 108-Cell Solar PanelZNShine ZNShine Solar 405W 108-Cell Solar Panel $147.61 $0.36/W · 405WAvailable to orderLead time confirmed at checkoutLONGi Hi-MO X6 Scientist 600W N-Type TOPCon Bifacial ModuleLONGi LONGi Hi-MO X6 Scientist 600W N-Type TOPCon Bifacial Mo... $161.29 $0.27/W · 600WAvailable to orderLead time confirmed at checkoutJinko Tiger Neo N-Type 600W Bifacial TOPCon Solar PanelJinko Solar Jinko Tiger Neo N-Type 600W Bifacial TOPCon Solar Panel $164.52 $0.27/W · 600WAvailable to orderLead time confirmed at checkoutCanadian Solar HiKu6 395W Mono Solar Panel - CS6R-395MS-HLCanadian Solar Canadian Solar HiKu6 395W Mono Solar Panel - CS6R-395MS-HL $162.00 $0.41/W · 395WAvailable to orderLead time confirmed at checkoutHyundai HiS-S410YH(BK) 410W Bifacial Commercial Solar PanelHyundai Energy Solutions Hyundai HiS-S410YH(BK) 410W Bifacial Commercial Solar P... $167.76 $0.41/W · 410WAvailable to orderLead time confirmed at checkoutTalesun TM7G54M-450 450W Bifacial Solar PanelTalesun Talesun TM7G54M-450 450W Bifacial Solar Panel $185.63 $0.41/W · 450WAvailable to orderLead time confirmed at checkoutAptos Solar DNA-120-BF10-440W 440W Bifacial Solar PanelAptos Aptos Solar DNA-120-BF10-440W 440W Bifacial Solar Panel $185.92 $0.42/W · 440WAvailable to orderLead time confirmed at checkoutJA Solar 545 W Solar Panel – JAM72D30‑545/MB, 144‑cell BifacialJA Solar JA Solar 545 W Solar Panel – JAM72D30‑545/MB, 144‑cell ... $262.79 Available to orderLead time confirmed at checkout
  • HomeGrid Stack'd Series 4.8kWh Module - Lithium Iron Phospate Battery

    HomeGrid Stack'd Series 4.8kWh Module - Lithium Iron Phospate Battery

    Sale
    HomeGrid
    $1,884.30 USD
    $2,349.00 USD $1,884.30 USD
    -20%
    $393/kWh
    In stock
    Ships in 1–2 business days
    SaleIn Stock
  • Homegrid Compact Series LFP 5.12kwh 51.2v

    Homegrid Compact Series LFP 5.12kwh 51.2v

    Sale
    HomeGrid
    $3,992.00 USD
    $3,995.00 USD $3,992.00 USD
    $780/kWh
    In stock
    Ships in 1–2 business days
    SaleIn Stock
  • BigBattery Gator Max 36v 120ah 5kWh LifePO4 Battery

    BigBattery Gator Max 36v 120ah 5kWh LifePO4 Battery

    Sale
    BigBattery
    $887.00 USD
    $890.00 USD $887.00 USD
    $177/kWh
    In stock
    Ships in 1–2 business days
    SaleIn Stock
  • Big Battery 48V 15kWH NEXUS LiFePO4 Battery

    Big Battery 48V 15kWH NEXUS LiFePO4 Battery

    BigBattery
    $3,158.33 USD
    $2,980.00 USD $3,158.33 USD
    $211/kWh
    In stock
    Ships in 1–2 business days
    In Stock
  • MidNite Power 5.12kWh 48V LFP Server Rack Battery MNPOWERFLO5

    MidNite Power 5.12kWh 48V LFP Server Rack Battery MNPOWERFLO5

    MidNite Solar
    $1,295.82 USD
    $1,295.82 USD
    $253/kWh
    In stock
    Ships in 1–2 business days
    In Stock
  • Endurenergy ESP-5100 B0005 5.1KWH 100AH 48V Battery Pack

    Endurenergy ESP-5100 B0005 5.1KWH 100AH 48V Battery Pack

    EndurEnergy Systems
    $2,864.18 USD
    $2,864.18 USD
    $562/kWh
    In stock
    Ships in 1–2 business days
    In Stock
  • NEW! AmpliPHI 3.8kWh LFP Battery, 48V with Integrated BMS w/ Communications- SolArkIncludes 4' CAT5 Cable & Terminator

    NEW! AmpliPHI 3.8kWh LFP Battery, 48V with Integrated BMS w/ Communications- SolArkIncludes 4' CAT5 Cable & Terminator

    SimpliPhi
    $2,919.68 USD
    $2,919.68 USD
    $768/kWh
    In stock
    Ships in 1–2 business days
    In Stock
  • Pylontech Pelio 5.12kWh 51.2V Residential LiFePO4 Battery – Pelio-L-5.12

    Pylontech Pelio 5.12kWh 51.2V Residential LiFePO4 Battery – Pelio-L-5.12

    Pylontech
    $1,597.69 USD
    $1,597.69 USD
    $312/kWh
    In stock
    Ships in 1–2 business days
    In Stock
  • Bluetti 13.3kWh Apex 300 + (2) B500K Kit – 3,000W Output / 13.3kWh Total Storage Backup Power Bundle

    Bluetti 13.3kWh Apex 300 + (2) B500K Kit – 3,000W Output / 13.3kWh Total Storage Backup Power Bundle

    Bluetti
    $4,687.25 USD
    $4,687.25 USD
    $352/kWh
    In stock
    Ships in 1–2 business days
    In Stock
  • Fortress eFlex Max - 5.4kWh 51.2V Battery

    Fortress eFlex Max - 5.4kWh 51.2V Battery

    Fortress
    $1,399.00 USD
    $1,399.00 USD
    $259/kWh
    In stock
    Ships in 1–2 business days
    In Stock
  • eVault Max 18.5

    Fortress Power eVault Max 18.5kWh LFP Battery

    Fortress Power
    $6,479.00 USD
    $6,479.00 USD
    $350/kWh
    Available to order
    Lead time confirmed at checkout
    In Stock
  • Fortress Power eFlex Max 5.4kWh 48V LFP Battery - Modular Storage

    Fortress Power eFlex Max 5.4kWh 48V LFP Battery - Modular Storage

    Fortress Power
    $1,519.00 USD
    $1,519.00 USD
    $281/kWh
    Available to order
    Lead time confirmed at checkout
    In Stock
  • Enphase IQ Battery 3T 3.36kWh LFP AC-Coupled Battery Module

    Enphase IQ Battery 3T 3.36kWh LFP AC-Coupled Battery Module

    Enphase
    $2,094.75 USD
    $2,094.75 USD
    $623/kWh
    Available to order
    Lead time confirmed at checkout
    In Stock
  • FranklinWH Energy Storage Inc. APR-10K15V2-US Batteries & Energy Storage - 15kW | Portlandia Electric Supply

    FranklinWH aPower 2 APR-10K15V2-US 15kWh AC-Coupled Battery 120/240Vac

    FranklinWH
    $9,275.75 USD
    $9,275.75 USD
    $618/kWh
    Available to order
    Lead time confirmed at checkout
    In Stock
  • Blue Planet 2.7kWh Stackable Battery

    Blue Planet 2.7kWh Stackable Battery

    Blue Planet
    $1,900.44 USD
    $1,900.44 USD
    $704/kWh
    Available to order
    Lead time confirmed at checkout
    In Stock
  • Discover Energy 115kWh Wall-Mount Battery

    Discover Energy 115kWh Wall-Mount Battery

    Discover Energy
    $24,201.71 USD
    $24,201.71 USD
    $210/kWh
    Available to order
    Lead time confirmed at checkout
    In Stock
  • Discover Energy 185kWh Portable Power Station

    Discover Energy 185kWh Portable Power Station

    Discover Energy
    $68,041.77 USD
    $68,041.77 USD
    $368/kWh
    Available to order
    Lead time confirmed at checkout
    In Stock
  • BATTERY PACK-2.5KWH-DR-E-SERIES

    Battery PACK-2.5KWH-DR-E-SERIES

    Battery
    $1,799.99 USD
    $1,799.99 USD
    $720/kWh
    Available to order
    Lead time confirmed at checkout
    In Stock
  • DR 2.5KWH E-SERIES BATTERY & CHARGER

    DR 2.5KWH E-SERIES Battery & Charger

    DR
    $1,999.99 USD
    $1,999.99 USD
    $800/kWh
    Available to order
    Lead time confirmed at checkout
    In Stock
  • EndurEnergy ESP-5K HL 5kWh Battery Pack with BMS

    EndurEnergy 5kWh Battery Pack with BMS (High-Low Voltage) – ESP-5K HL

    EndurEnergy
    $3,282.51 USD
    $3,282.51 USD
    $657/kWh
    Available to order
    Lead time confirmed at checkout
    In Stock
  • HomeGrid 4.8kWh Battery Module HG-FS48100-15OSJ1

    HomeGrid 4.8kWh Battery Module – HG-FS48100-15OSJ1

    HomeGrid
    $1,884.30 USD
    $1,884.30 USD
    $393/kWh
    Available to order
    Lead time confirmed at checkout
    In Stock
  • Pylontech 48V LFP battery 4.8kWh Battery US5000 — front view

    Pylontech 48V LFP battery 4.8kWh Battery US5000

    Pylontech
    $2,742.13 USD
    $2,742.13 USD
    $571/kWh
    Available to order
    Lead time confirmed at checkout
    In Stock
  • Fortress 5.4kWh 51.2V 105Ah eFlex Max LFP Battery with Top Cover and Busbar – eFlex Max

    Fortress 5.4kWh 51.2V 105Ah eFlex Max LFP Battery with Top Cover and Busbar – eFlex Max

    Fortress Power
    $1,515.20 USD
    $1,515.20 USD
    $281/kWh
    Available to order
    Lead time confirmed at checkout
    In Stock
  • BYD Complete 5.12kWh system consisting of one BU and two B-Plus-H 2.5 battery modules Battery-Box H5.0 — front view

    BYD Complete 5.12kWh system consisting of one BU and two B-Plus-H 2.5 battery modules Battery-Box H5.0

    BYD
    $4,841.80 USD
    $4,841.80 USD
    $946/kWh
    EOL — While Supplies Last
    Available to order
    Lead time confirmed at checkout
    In Stock
  • BYD B-BOX B-PLUS-H 2.56kWh Lithium Iron Battery Module – BYD-B-PLUS-H-2.56

    BYD B-BOX B-PLUS-H 2.56kWh Lithium Iron Battery Module – BYD-B-PLUS-H-2.56

    BYD
    $2,078.83 USD
    $2,078.83 USD
    $812/kWh
    EOL — While Supplies Last
    Available to order
    Lead time confirmed at checkout
    In Stock
  • Fortress Power eFlex 5.4 G2 5.4kWh LFP Battery – eFlex 5.4 G2 — side angle

    Fortress Power eFlex 5.4 G2 5.4kWh LFP Battery – eFlex 5.4 G2

    Fortress Power
    $3,274.69 USD
    $3,274.69 USD
    $606/kWh
    Available to order
    Lead time confirmed at checkout
    In Stock
  • Fortress eFlex 5.4 5.374kWh 51.2V Lithium Ferro Phosphate (LFP) Battery – 105Ah, Parallel up to 15 Units – eFlex 5.4

    Fortress eFlex 5.4 5.374kWh 51.2V Lithium Ferro Phosphate (LFP) Battery – 105Ah, Parallel up to 15 Units – eFlex 5.4

    Fortress Power
    $2,329.00 USD
    $2,329.00 USD
    $433/kWh
    Available to order
    Lead time confirmed at checkout
    In Stock
  • Panasonic 13.5kWh Energy Storage System - EVHB-I7-X15 — front view

    Panasonic 13.5kWh Energy Storage System - EVHB-I7-X15

    Panasonic
    $11,186.73 USD
    $11,186.73 USD
    $829/kWh
    Available to order
    Lead time confirmed at checkout
    In Stock
  • Briggs and Stratton Simpliphi AccESS 19 (5x PHI 3.8kWh @48V)- with 12kW Inverter & Integrated Charge Controllers-050001…

    Briggs and Stratton Simpliphi AccESS 19 (5x PHI 3.8kWh @48V)- with 12kW Inverter & Integrated Charge Controllers-050001 A-5PHI-SA-12

    Briggs & Stratton
    $3,982.00 USD
    $3,982.00 USD
    Available to order
    Ships in 2–4 weeks
    In Stock
  • GoodWe Lynx FH-US HV for US market Battery Module 3.2kWh - BMU0032-01-00P — front view

    GoodWe Lynx FH-US HV for US market Battery Module 3.2kWh - BMU0032-01-00P

    GoodWe
    $1,272.70 USD
    $1,272.70 USD
    $398/kWh
    Available to order
    Lead time confirmed at checkout
    In Stock
  • FoxESS Sub LFP Stakable Batteries with full capacity 3.975kWh - CS4000 ( 30-218-20103-00 )

    FoxESS Sub LFP Stakable Batteries with full capacity 3.975kWh - CS4000 ( 30-218-20103-00 )

    FoxESS
    $1,520.09 USD
    $1,520.09 USD
    $382/kWh
    Available to order
    Lead time confirmed at checkout
    In Stock
  • FoxESS Master LFP Stakable Batteries with full capacity 3.975kWh - CM4000 ( 30-218-10103-00 )

    FoxESS Master LFP Stakable Batteries with full capacity 3.975kWh - CM4000 ( 30-218-10103-00 )

    FoxESS
    $1,718.86 USD
    $1,718.86 USD
    $432/kWh
    Available to order
    Lead time confirmed at checkout
    In Stock
  • Fortress Power LFP battery 105 AH 5.4kWh total capacity max. 10 year warranty A14 Wall mount bracket included - eFlex 5.4…

    Fortress Power LFP battery 105 AH 5.4kWh total capacity max. 10 year warranty A14 Wall mount bracket included - eFlex 5.4 kWh

    Fortress Power
    $2,329.00 USD
    $2,329.00 USD
    $431/kWh
    Available to order
    Lead time confirmed at checkout
    In Stock
  • Fortress Power 105Ah 51.2V Nominal 5.4kWh LFP battery - eFlex Max 5.4 — back view

    Fortress Power 105Ah 51.2V Nominal 5.4kWh LFP battery - eFlex Max 5.4

    Fortress Power
    $1,519.00 USD
    $1,519.00 USD
    $281/kWh
    Available to order
    Lead time confirmed at checkout
    In Stock
  • Briggs and Stratton SimpliPhi AmpliPHI 3.8kWh 48V LFP Battery with Integrated BMS - AMPLIPHI-3.8-48

    Briggs and Stratton SimpliPhi AmpliPHI 3.8kWh 48V LFP Battery with Integrated BMS - AMPLIPHI-3.8-48

    Briggs & Stratton
    $3,967.06 USD
    $3,967.06 USD
    $1044/kWh
    Available to order
    Ships in 2–4 weeks
    In Stock
  • Fortress Power eFlex MAX 5.4 51.2V 5.4kWh LFP Lithium Battery

    Fortress Power eFlex MAX 5.4 51.2V 5.4kWh LFP Lithium Battery

    Sold Out — Call or Email
    Fortress Power
    $1,519.00 USD
    $1,519.00 USD
    $281/kWh
    Out of stock
    Call Now
    Sold Out — Call or Email
  • EG4 LifePower4 24V 5.12kWh 200Ah

    EG4 LifePower4 24V 5.12kWh 200Ah Lithium Iron Phosphate Battery

    Sold Out — Call or Email
    EG4 Electronics
    $1,196.00 USD
    $1,349.00 USD $1,196.00 USD
    -11%
    $234/kWh
    Out of stock
    Call Now
    Sold Out — Call or Email
  • EG4 LL-S 5.12Kwh 12V 400Ah Server Rack Battery

    EG4 LL-S 5.12Kwh 12V 400Ah Lithium Iron Phosphate Server Rack Battery

    Sold Out — Call or Email
    EG4 Electronics
    $1,426.99 USD
    $1,429.99 USD $1,426.99 USD
    $279/kWh
    Out of stock
    Call Now
    Sold Out — Call or Email
  • EG4 LL-S 5.12Kwh 48V 100Ah Lithium Iron Phosphate Server Rack Battery

    EG4 LL-S 5.12Kwh 48V 100Ah Lithium Iron Phosphate Server Rack Battery

    Sold Out — Call or Email
    EG4 Electronics
    $1,536.99 USD
    $1,707.77 USD $1,536.99 USD
    -10%
    $300/kWh
    Out of stock
    Call Now
    Sold Out — Call or Email
  • EG4 LL-S 5.12Kwh 24V 200Ah Server Rack Battery

    EG4 LL-S 5.12Kwh 24V 200Ah Lithium Iron Phosphate Server Rack Battery

    Sold Out — Call or Email
    EG4 Electronics
    $1,426.99 USD
    $1,429.99 USD $1,426.99 USD
    $279/kWh
    Out of stock
    Call Now
    Sold Out — Call or Email
  • EG4 LifePower4 48V 5.12kWh 100Ah Lithium Iron Phosphate Battery

    EG4 LifePower4 48V 5.12kWh 100Ah Lithium Iron Phosphate Battery

    Sold Out — Call or Email
    EG4 Electronics
    $1,496.00 USD
    $1,499.00 USD $1,496.00 USD
    $292/kWh
    Out of stock
    Call Now
    Sold Out — Call or Email
  • BigBattery Ethos 5.12kWh 51.2v (48V Nominal) 100Ah, Stackable Battery Module

    BigBattery Ethos 5.12kWh 51.2v (48V Nominal) 100Ah, Stackable Battery Module

    Sold Out — Call or Email
    BigBattery
    $2,603.47 USD
    $1,250.00 USD $2,603.47 USD
    $508/kWh
    Out of stock
    Call Now
    Sold Out — Call or Email
  • Husky 2 12V 400Ah

    Big Battery Husky 2 - 12V 5.12kWh 400ah LifePO4 Battery

    Sold Out — Call or Email
    BigBattery
    $1,447.00 USD
    $1,450.00 USD $1,447.00 USD
    $283/kWh
    Out of stock
    Call Now
    Sold Out — Call or Email
  • BigBattery Husky 2 - 24v 5.12kWh 200Ah LifePO4 Battery

    BigBattery Husky 2 - 24v 5.12kWh 200Ah LifePO4 Battery

    Sold Out — Call or Email
    BigBattery
    $1,447.00 USD
    $1,450.00 USD $1,447.00 USD
    $283/kWh
    Out of stock
    Call Now
    Sold Out — Call or Email
  • BigBattery Husky 2 48V LifePO4 Battery 100Ah 5.12kWh

    BigBattery Husky 2 48V LifePO4 Battery 100Ah 5.12kWh

    Sold Out — Call or Email
    BigBattery
    $1,847.00 USD
    $1,850.00 USD $1,847.00 USD
    $361/kWh
    Out of stock
    Call Now
    Sold Out — Call or Email
  • Briggs & Stratton SimpliPHI 6.6 Battery 6.65kWh 48V STACKABLE SIMPLIPHI-6_6-BATTERY

    Briggs & Stratton SimpliPHI 6.6 Battery 6.65kWh 48V STACKABLE SIMPLIPHI-6_6-BATTERY

    Sold Out — Call or Email
    SimpliPhi
    $2,775.04 USD
    $2,946.67 USD $2,775.04 USD
    -6%
    Out of stock
    Call Now
    Sold Out — Call or Email
  • Mango Power 5 kWh Battery Lithium Iron Phosphate Battery Module LiFePO₄ M Battery 5kWh

    Mango Power M Battery 5kWh LFP Module

    Sold Out — Call or Email
    Mango Power
    $1,922.35 USD
    $1,932.01 USD $1,922.35 USD
    Out of stock
    Call Now
    Sold Out — Call or Email
  • Enphase IQ Battery 10C 5kWh Expansion Unit (Domestic) B05-C01-US00-1-3-11.9-DOM — PES Supply

    Enphase IQ Battery 10C 5kWh Expansion Unit (Domestic) B05-C01-US00-1-3-11.9-DOM

    Sold Out — Call or Email
    Enphase
    $4,226.72 USD
    $4,226.72 USD
    Out of stock
    Call Now
    Sold Out — Call or Email

About 2.5-5.4kWh Batteries

Essential-backup 2.5-5.4kWh lithium batteries and rack modules from EG4, Fortress Power, Pytes, SimpliPhi and MK Battery. Start small and stack more capacity later.