ZERITHIUM SIB-48

πŸ”‹ Parts 1–4 Live Β· First charge cycle complete Β· Cell01 OVP documented Β· Founders Batch β€” $199 Refundable β†’
America's First Publicly Documented Sodium-Ion Home Battery

48V Sodium-Ion
Home Storage
Built & Tested.

48V Β· 210Ah Β· ~10kWh Β· Ships from Aurora, Illinois

βœ“ Parts 1–4 Live on YouTube βœ“ First charge cycle complete βœ“ 16 cells QA tested β€” 2 rejected βœ“ Manufacturer responses published
Reserve β€” $199 Deposit Watch The Build
~10kWh
Usable Energy
48V
Nominal
4,000+
Cycle Life
$2,199
Complete Pack

The Build Series β€” All Public

Watch Before You Decide

Every build decision, every test result, every problem documented on camera. Four videos live now. Two more coming.

PART 1 β€” LIVE

Cell Unboxing

16 Hakadi NaFP 210Ah cells arrive. First Na-ion cells documented in the US.

Watch β†’

PART 2 β€” LIVE

Cell QA Testing

16 cells tested. 2 rejected. 4.92mΞ© and 7.33mΞ© flagged and documented.

Watch β†’

PART 3 β€” LIVE

Enclosure Unboxing

Seplos MASON-210 arrives. Every component identified on camera.

Watch β†’

PART 4 β€” LIVE

Assembly + First Power-On

All 16 cells in. BMS wired. First boot: 43.14V Β· Zero warnings.

Watch β†’

PART 5 β€” UPLOADING SOON

First Charge Cycle

17.79A constant Β· Cell01 OVP documented Β· BMS responded correctly overnight.

Watch β†’

PART 6 β€” COMING

Load Test + Discharge

Inverter + space heater load. Measured Ah vs rated 210Ah published here.

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Live Data β€” What The Instruments Actually Showed

Not renders. Not specs. Screenshots.

Every image below is a direct screenshot from the Seplos BMS app or BatteryMonitor V2.1.12 during the actual charge cycle. Nothing staged. Nothing cleaned up.

Pre-charge Β· 9:10pm Β· May 14

BMS app showing 42.63V, 49% SOC, 0.00A before charge started

42.63V Β· 49.0% SOC Β· 0.00A Β· Warn: None

Charging Β· 9:47pm Β· 17.79A flowing

Seplos LCD showing PackV 43.85V, Current 17.79A, SOC 49.80%

43.85V Β· 49.8% SOC Β· 17.79A Β· Warn: N

RS485 Β· Laptop BMS Β· 9:49pm

BatteryMonitor V2.1.12 showing 44.04V, 50.1% SOC, 17.78A

44.04V Β· 50.1% SOC Β· 17.78A Β· None warn Β· RS485

OVP event Β· 6:21am Β· BMS responded correctly

BMS showing monomer overvoltage protection, Cell01 at 3.875V, pack at 54.84V

54.84V Β· Cell01: 3.875V Β· OVP triggered Β· 0.00A Β· BMS stopped charge automatically

What this means for your pack

Every ZERITHIUM SIB-48 ships with its own charge cycle data. You see the actual BMS screenshots from your specific pack before it leaves Aurora, Illinois. Not manufacturer specs. Your pack's actual numbers.

ENGINEERING REPORT ACCESS

Request The Full Charge Report

Enter your email to request the full engineering PDF report. Reports are manually reviewed and sent from Saltra Batteries.

Engineering inquiries only Β· No spam


Build Status β€” Live

Where The Build Is Today

Every milestone documented publicly. Nothing marked complete until the video is live.

βœ“ Done
Cell QA Testing
16 cells tested Β· 2 rejected Β· replacements cleared
βœ“ Done
Pack Assembly
All 16 cells installed Β· BMS wired Β· 43.14V first boot
βœ“ Done
First Charge Cycle
42.63V β†’ 54.84V Β· Cell01 OVP documented Β· BMS responded correctly
⟳ Now
Cell Balance + Discharge
Controlled discharge Β· second charge cycle pending

Quality Assurance

We Test Every Cell.
We Reject The Bad Ones.

Every cell is individually tested β€” OCV, internal resistance, weight, and dimensions β€” before it goes in the enclosure.

Two cells rejected from this batch. Cell 066 measured 4.92mΞ© β€” double the batch average. Cell 075 hit 7.33mΞ© β€” three times the average. Both flagged. Neither is in your pack.
Replacements ordered and cleared. Two replacement cells arrived under 1.1mΞ© β€” the best readings in the set. All 16 slots verified.

The full QA datasheet β€” every serial number, every reading β€” is included with your pack.

Batch Average IR 16 cells Β· Hakadi NaFP
~2.3mΞ©
Replacement R1 Cleared Β· in pack
1.05mΞ©
Replacement R2 Cleared Β· in pack
1.09mΞ©
Cell 066 β€” Rejected +113% above average
4.92mΞ©
Cell 075 β€” Rejected +218% above average
7.33mΞ©
Pack Assembly Map All 16 slots verified
16/16CLEARED

Technical Specifications

SIB-48 Full Specs

βœ“ All 16 Cells QA Cleared
Chemistry NaFP Sodium-Ion
Configuration 16S1P
Nominal Voltage 48V (51.2V)
Capacity 210Ah
Total Energy ~10.7 kWh
Cell Hakadi NaFP 210Ah Prismatic
Enclosure Seplos MASON-210
BMS 200A Smart Β· NaFP Pre-Configured
Communications CAN Bus / RS485 / Bluetooth
Inverter Compatibility Victron Β· Growatt Β· DEYE Β· SMA
Cycle Life 4,000+ @ 80% DoD
Cold Operation (reported) βˆ’40Β°C β€” direct testing planned
Thermal Runaway None
Ships From Aurora, Illinois πŸ‡ΊπŸ‡Έ

Every cell tested β€” OCV, internal resistance, weight, dimensions. QA datasheet included with every pack.


The Chemistry

Why Sodium-Ion?

Not marketing. The actual differences between NaFP and standard LiFePO4 that matter for home storage.

❄️
Designed for cold climates
Manufacturer-rated to βˆ’40Β°C. Sodium-ion chemistry is designed for low-temperature operation. Direct testing planned.
πŸ”₯
No thermal runaway
Inherently stable NaFP chemistry. No dendrites. No cobalt. No lithium.
⚑
4,000+ cycles
8+ years of daily cycling at 80% DoD with 70% capacity retention at rated conditions.
🌍
No conflict minerals
Zero cobalt. Zero lithium. Sodium is the 6th most abundant element on Earth.
πŸ’°
$2,199 complete
~10kWh fully assembled and tested. Competitive with LiFePO4 and chemistry costs are falling.
πŸ”Œ
Drop-in compatible
48V, CAN bus, RS485. Works with Victron, Growatt, DEYE, SMA β€” any 48V setup.

Comparison

ZERITHIUM vs The Alternatives

ZERITHIUM SIB-48 LiFePO4 DIY Commercial Kit
Thermal runaway βœ“ None Low, present Low–Med
Cold climate rating βœ“ Rated βˆ’40Β°C βœ— Typically reduced Varies
Lithium / Cobalt βœ“ Zero βœ— Required βœ— Required
Cell-level QA docs βœ“ Every cell Rarely No
Charge cycle data public βœ“ Full log on YouTube βœ— No βœ— No
Builder support βœ“ Direct access βœ— DIY only βœ— Ticket queue
~10kWh price $2,199 Founders $1,800–$3,200+ $3,000–$8,000+

Founders Batch β€” First 20 Units

Early Access Pricing

Controlled first build β€” not mass production. Every pack assembled, charged, and tested in Aurora, Illinois. Price locked from deposit.

Option 01

Cells Only β€” 16S Matched Set

$1,299$1,599
Save $300
  • 16Γ— Hakadi NaFP 210Ah prismatic cells
  • Matched for OCV and IR variance
  • Full QA datasheet β€” every serial number
  • Founding Member status + direct support
Reserve Cells β†’

Option 02 β€” Recommended

Complete Pack β€” Fully Assembled

$2,199$2,699
Save $500
  • Everything in Cells Only, plus:
  • Seplos MASON-210 enclosure
  • 200A Smart BMS β€” NaFP pre-configured
  • LCD Β· Bluetooth Β· CAN cables Β· assembled
  • Charged and tested before shipping
Reserve Complete Pack β†’

Start with a $199 Fully Refundable Deposit

Locks your price and position. Applies to final payment. Change your mind for any reason β€” full refund in 5 business days. No questions asked.

Reserve β€” $199

100% Refundable Β· No Commitment


The Process

How It Works

1
Deposit
$199 refundable. Locks your price.
2
Price Locked
Standard pricing launches higher.
3
Build Updates
Follow every milestone.
4
Q3 2026
Delivery. $199 applies to balance.
5
Plug In
Victron, Growatt, DEYE, SMA.

Build Log β€” Engineering Updates Only

Follow the build. Get the data.

Charge logs, discharge curves, load test results. No sales emails. Engineering updates only.

No spam Β· Unsubscribe any time


Ready

Built. Charged. Tested. Honest.

Four build videos live. First charge cycle complete. Every data point published before you commit a dollar. The $199 deposit is fully refundable. You are not buying until you are ready.

Reserve Your Spot β€” $199

Q3 2026 Delivery Β· Aurora, Illinois Β· 100% Refundable