# GSIKE 15kW 51.2V 300Ah LiFePO4 Battery: 16kWh Whole-Home Backup | GSIKE US # GSIKE 15kW 51.2V 300Ah LiFePO4 Battery — 16,076.8Wh, 200A BMS, 6000 Cycles, Whole-Home US Backup & Solar **The GSIKE GSK-51.2V-300AH is a floor-standing 51.2V LiFePO4 home energy-storage cabinet that stores 16,076.8 Wh (about 16 kWh, marketed as a 15 kW class system) and delivers up to 200 A charge and discharge through an intelligent BMS, rated for 6000 cycles at 80% DoD over a 10-year design life. It is built for the US whole-home backup, solar self-consumption and off-grid cabin-shop owner who wants a single 16 kWh node that can scale to 16 cabinets in parallel.** 16,076.8 Wh 51.2V / 48V class 200A BMS ~10.2 kW DC ceiling 6000 cycles @80% DoD 58.4V charge RS485/CAN/RS232 Pylontech-compatible up to 16 in parallel IP54 109.3 kg 10-year design life ![GSIKE 15kW 51.2V 300Ah LiFePO4 floor-standing home energy storage cabinet, front view with small LCD display](https://cdn.shopify.com/s/files/1/0729/3042/7041/files/51.2v-300ah.webp?v=1782888381) **What this is (and what it is not).** Model **GSK-51.2V-300AH** is a 51.2V (48V-class) DC energy-storage cabinet — not an inverter, not a transfer switch, and not an all-in-one power station. There is no built-in 120/240V AC outlet and no MPPT solar input on the battery itself. Two numbers matter: it holds **16,076.8 Wh** (51.2V × 314Ah) and its **200A DC ceiling** works out to about **10.2 kW** of continuous DC power — not 15 kW of output. The "15kW" in the name is the energy class (~15–16 kWh), not a 15 kW continuous power rating. To run a US split-phase home you add a **compatible 48V split-phase hybrid inverter** (Pylontech protocol over RS485/CAN). **Specification note — read before you size loads.** (a) **300Ah vs 314Ah:** the title says 300Ah; the official detail table lists the cell rating as 314Ah. Energy math uses 314Ah × 51.2V = **16,076.8 Wh**. (b) **15kW naming:** the BMS is rated **200A** charge/discharge. At 51.2V that is about **10.2 kW** continuous — plan loads to 200A, not to 15 kW. (c) **Expansion:** parallel only, up to **16 units**; the manual does not specify a series option. ## Official specifications Parameter Value Model **GSK-51.2V-300AH** (the 300Ah / 15kW-class cabinet; the 100Ah row in the same table is GSK-51.2V-100AH) Chemistry / nominal voltage LiFePO4 (LFP), **51.2V** nominal (48V-class residential bus) Rated cell capacity **314 Ah** per spec table (marketed as 300Ah) Total stored energy **16,076.8 Wh = 16.08 kWh** (51.2V × 314Ah) Charge voltage **58.4V** CC/CV Discharge voltage range **40V to 58.4V** Max. charge current **200 A** Max. discharge current **200 A** continuous (~10.2 kW at 51.2V) Communication **RS232 / RS485 / CAN-BUS**, Pylontech-compatible protocol Parallel expansion **Up to 16 units in parallel** (about 257 kWh bank); parallel-only, no specified series Cycle life **6000 cycles at 80% DoD**, 25°C Design life **10 years** Depth of discharge **80%** rated Operating temperature **\-10°C to 50°C** Storage temperature 0°C to 35°C Ingress protection **IP54** (indoor, dust- and splash-rated) Installation **Floor-standing** cabinet Net / gross weight **109.3 kg / 126.2 kg** (~241 lb net / ~278 lb gross) Dimensions (L×W×H) **825 × 650 × 450 mm** (~32.5 × 25.6 × 17.7 in) Humidity / altitude <95% RH / below 2000 m ## Why a 16 kWh 48V cabinet fits the US whole-home trend US home backup buyers are moving past single 5 kWh wall batteries. A single 5 kWh cabinet runs a fridge and a few lights overnight, but a typical American house — fridge, chest freezer, well pump, HVAC fan, Wi-Fi, lighting and a modest kitchen load — draws 1.5 to 3 kWh an hour during an evening outage. At that rate a 5 kWh cabinet is empty by bedtime. The GSIKE GSK-51.2V-300AH stores **16,076.8 Wh**, of which about 12.9 kWh is comfortably usable at the rated 80% DoD, and about 11.5 to 12 kWh reaches the AC side after inverter efficiency. That is the difference between a few hours of outage comfort and a full overnight backup. At 51.2V the 200A BMS keeps the continuous DC current reasonable for the cable size. Pulling the same 10.2 kW from a 24V bus would demand over 400A and very heavy copper; at 48V the cable run to a split-phase hybrid inverter stays manageable. The cabinet is floor-standing at 109.3 kg, so it belongs on a garage or utility-room floor next to the inverter, not on a wall. Scale is the other reason US homeowners pick this platform: up to 16 cabinets in parallel grows the bank from 16 kWh to roughly 257 kWh for a whole-home or light-commercial install. ![GSIKE 51.2V 300Ah cabinet front detail](https://cdn.shopify.com/s/files/1/0729/3042/7041/files/51.2v-300ah_1.webp?v=1783583686) ![Terminal and cable view](https://cdn.shopify.com/s/files/1/0729/3042/7041/files/51.2v-300ah_3.webp?v=1783583687) ![Cell and BMS view](https://cdn.shopify.com/s/files/1/0729/3042/7041/files/51.2v-300ah_6.webp?v=1783583687) ## Real-world use cases ![Two matte-white floor-standing residential LiFePO4 battery cabinets side by side on a steel rack with a large grey split-phase hybrid inverter above in a clean US utility room](https://aka.doubaocdn.com/s/dbiWg3hrKu) ### Whole-home essential backup One 16 kWh cabinet feeds a 5–8 kW split-phase hybrid inverter; essentials run through the night during a utility outage. ![US home solar self-consumption room, matte-white floor-standing battery cabinet with a wall inverter and net energy meter, bright window](https://aka.doubaocdn.com/s/GVqik7bYsU) ### Solar self-consumption Store midday rooftop solar and use it in the evening, cutting grid import instead of exporting at a low feed-in tariff. ![Off-grid US log cabin interior at dusk, matte-white floor-standing LiFePO4 battery cabinet beside a small off-grid inverter, warm pendant light, solar panel through the window](https://aka.doubaocdn.com/s/K1rcqkRx89) ### Off-grid cabin A cabin-shop pair runs lights, a well pump and a chest fridge on solar-charged storage, no grid connection required. ![US residential split-phase breaker panel with a thick black and red battery conduit running from a matte-white floor-standing battery cabinet into the panel](https://aka.doubaocdn.com/s/zVoyIVRwoi) ### Split-phase panel tie-in Cabinet DC feeds a hybrid inverter that back-feeds a 120/240 US panel on essential circuits. ![US home garage workshop, matte-white floor-standing LiFePO4 battery cabinet on concrete next to a tool workbench and a grey wall inverter](https://aka.doubaocdn.com/s/Zih6gX94fd) ### Home workshop / shop Power tools, LED site lighting and a small compressor run between solar charges in a detached shop. ![Four matte-white floor-standing residential battery cabinets in a row on a heavy steel rack in a US garage, thick cables between them](https://aka.doubaocdn.com/s/SUdv4DUyEI) ### Multi-cabinet bank Up to 16 cabinets in parallel grow the system toward 257 kWh for larger homes or light commercial loads. ![Single matte-white floor-standing residential LiFePO4 battery cabinet on a painted cinder-block garage wall with a wall-mounted split-phase hybrid inverter above and red and black DC cables in conduit](https://aka.doubaocdn.com/s/XLQu4ng3KZ) ### Garage install layout The floor-standing cabinet sits on a flat garage floor with the hybrid inverter on the wall above, DC cables run in conduit. ![Two matte-white floor-standing residential LiFePO4 battery cabinets side by side on a concrete basement floor with a grey split-phase hybrid inverter on the wall and neat cable management](https://aka.doubaocdn.com/s/e4FQ2jtTxH) ### Basement utility room Two cabinets side by side on a concrete floor, neatly wired, fit a finished US basement utility corner. ![US residential split-phase breaker panel door open with a hand tightening a breaker, red and black AC wires and a dedicated backup sub-panel beside the main panel](https://aka.doubaocdn.com/s/ojWfHlHZgs) ### Backup sub-panel A licensed electrician ties the inverter to a dedicated backup sub-panel carrying only essential circuits. ![Off-grid US wooded cabin at dusk with warm lit windows, a small rooftop solar array and a white battery cabinet visible through the open garage door](https://aka.doubaocdn.com/s/4Gqi8fIPmd) ### Off-grid cabin dusk Warm cabin light through an outage, solar on the roof, the cabinet in the open garage keeps the lights on. ![US metal workshop interior with a matte-white floor-standing battery cabinet on a steel rack, a tool bench and a freestanding solar panel rack](https://aka.doubaocdn.com/s/j1sGtgocSF) ### Detached metal shop A remote workshop runs tools and lighting between solar charges with the cabinet on its own steel rack. ![Six matte-white floor-standing residential battery cabinets in a neat row in a clean utility room with equal-length red and black DC cables running to a common bus bar](https://aka.doubaocdn.com/s/7tQLVIWNJq) ### Larger parallel bank Six cabinets in a row, equal-length cables to a common bus bar, show how a bank scales toward the 16-unit parallel limit. ## Runtime table — what 16 kWh will actually run Essential load Example US gear One cabinet (12.9 kWh usable) Two cabinets (25.8 kWh usable) 300 W Fridge + lights + router ~40 h ~80 h 800 W Fridge + TV + fans + well pump cycles ~16 h ~32 h 1.5 kW Essential circuits + HVAC fan ~8.5 h ~17 h 3 kW \+ microwave / coffee on demand ~4.3 h ~8.6 h 5 kW Split-phase essentials at peak ~2.6 h ~5.2 h 10.2 kW BMS DC ceiling (200A) do not plan sustained at limit ~2.5 h max Planning estimates only. Derate by inverter efficiency (~95%) and keep a 10–20% state-of-charge buffer. A 3-ton air-conditioner compressor or an electric dryer draws more than a single cabinet should carry continuously; move those to a generator or a larger multi-cabinet bank. ## Protocol matching — which inverter will actually talk to this cabinet The BMS exposes three physical transports: **RS232, RS485 and CAN-BUS**, speaking the common Pylontech-style data protocol. That is the protocol family most 48V residential hybrid inverters sold in the US already expect, because Pylontech defined the de-facto standard for 51.2V battery comms. In practice this means you can set the inverter battery type to "Pylontech" (or the equivalent LFP / CAN battery preset) and the inverter will read state of charge, cell voltage and temperature from the cabinet and throttle charge and discharge accordingly. We state the protocol rather than certify every model, because firmware revisions and connector pinouts differ between brands and even between versions of the same inverter. Before ordering, tell the merchant your exact inverter model and ask them to confirm the battery setting and the comms cable pinout. Bus What it is used for Practical note RS485 Primary BMS-to-inverter comms on most Pylontech-compatible hybrids The default first choice; use the supplied RJ45 / comms cable CAN-BUS Faster, more robust comms on newer hybrid inverters Select the CAN battery preset on the inverter RS232 Service / diagnostic port For dealer setup and BMS reading, not the main link Compatibility is protocol-level, not a guarantee of every feature on every firmware. If your inverter brand is not on the merchant's confirmed list, ask before you buy rather than after. ## Objective pros and cons ### Pros - **Real whole-home energy:** 16,076.8 Wh per cabinet — roughly 3× a 5 kWh wall battery. - **200A BMS:** about 10.2 kW continuous DC, enough for a 5–8 kW split-phase inverter. - **Cycle life:** 6000 cycles at 80% DoD over a 10-year design life. - **Scalable:** up to 16 cabinets in parallel, toward ~257 kWh. - **Open protocol:** RS485/CAN/RS232, Pylontech-compatible with common US hybrid inverters. - **Price:** EUR 1,569.99 struck from EUR 2,250.00 — far below name-brand 16 kWh US systems. ### Cons - **Not 15 kW output:** the 15 kW badge is energy class; continuous DC ceiling is ~10.2 kW. - **Heavy:** 109.3 kg net / 126.2 kg gross — two-person install, not a wall battery. - **DC-only:** you must supply a compatible 48V split-phase hybrid inverter; no AC outlet built in. - **IP54, indoor:** garage / utility room rated, not outdoor-rated like some all-weather rivals. - **No series option:** expansion is parallel-only on this platform. - **Listed in EUR;** confirm USD display at checkout for the US order. ## Lead-acid vs this 16 kWh LiFePO4 cabinet A lead-acid bank that delivers the same 12 kWh of usable energy would need about 24 kWh of flooded AGM or gel capacity, because lead-acid is typically limited to a 50% depth of discharge. That works out to roughly a dozen 12V 100Ah batteries weighing over 400 kg, needing ventilation, watering and replacement every three to five years. This single 109.3 kg LiFePO4 cabinet delivers about 12.9 kWh of usable energy at the rated 80% DoD, with no watering, no off-gassing and a 6000-cycle / 10-year design life. The up-front cost is higher than a one-off lead-acid purchase, but over a decade the LiFePO4 cabinet wins on both weight and total cost of ownership, and it occupies one floor-standing slot instead of a whole battery room. ## US shipping, returns and warranty Ships **free within the United States** (shipping rate 0), with **1–3 days of handling** plus **3–7 days of transit**, and a **30-day return window** by post. The cabinet carries a **10-year design life** and a **6000-cycle** rating at 80% DoD. It is sold new and in stock, model GSK-51.2V-300AH. ## Keep reading on the GSIKE whole-home battery set [Best 15 kWh whole-home LiFePO4 battery in the US 2026](https://gesike.com/blogs/news/best-15-kwh-whole-home-lifepo4-battery-in-the-us-2026-gsike-vs-eg4-franklin-neovolta-simpliphi-growatt) How GSIKE compares with EG4, Franklin, NeoVolta, Simpliphi and Growatt. [GSIKE 15kW vs EG4 18kPV / Franklin / NeoVolta](https://gesike.com/blogs/news/gsike-15kw-51-2v-300ah-vs-eg4-18kpv-franklinhome-neovolta-head-to-head-2026) Head-to-head specs, price and the Final Verdict. [48V whole-home battery sizing guide](https://gesike.com/blogs/news/gsike-48v-whole-home-battery-sizing-guide-how-many-kwh-for-whole-house-backup) How many kWh and what inverter for your house. [Install a 51.2V 300Ah battery on a split-phase panel](https://gesike.com/blogs/news/gsike-51-2v-300ah-battery-install-split-phase-panel-step-by-step) Cables, inverter pairing, CAN/RS485 setup step by step. 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