MIX ANY TWO BATTERY BANKS
• Different Chemistries • Different Capacities • Different Ages
The world's first dual-bank system that lets you combine any two battery banks:
• Different Chemistries (LiFePO4 + SIB + AGM + GEL)
• Different Capacities (example: 300Ah + 100Ah, 400Ah + 150Ah)
• Different Ages(brand new 2024/2025 + aging 2019 bank)
Automatic fail-over - Zero downtime
.svg){kind=icon}
.svg){kind=icon}
.svg){kind=icon}
.svg){kind=icon}
THE PROBLEM
You upgraded to a new lithium bank. Your old AGM bank from 2019 still works but has degraded to 60% capacity.
You can't connect them together (different chemistry, different age, different capacity). Traditional systems say: "Throw it away."
KALION DUO™ says: "Use it as backup power." That's a minimum of $800-$1,500 you just saved.
Want to connect two battery banks? Traditional dual-battery systems require:
• Same chemistry (both lithium OR both AGM, never mixed)
• Same capacity (example: both 300Ah, can't mix 300Ah + 100Ah banks)
• Same age (mixing old + new causes voltage imbalance)
Break any of these rules and your system fails, damages batteries, or creates fire hazards. So you throw away working batteries worth thousands.
Your 2020 battery bank has degraded to 70% capacity after 4 years. It still works, but can't handle your full load anymore. Your only option?
Replace the entire bank for $3,000-$5,000. What if you could keep using it as backup while a new bank handles primary loads? You'd extend its life by 3-5 years.
Off-grid cabin. Remote telecom site. Medical equipment. When your single battery bank fails, everything goes down.
You need backup power but can't afford a second identical bank. You're stuck with one point of failure.
FEATURES
.avif)
.svg){kind=icon}
Mix ANY Two Battery Banks - First Time Ever
The world's first system that lets you combine ANY two battery banks on the same load circuit, regardless of:
• Different Chemistries : LiFePO4, SODIUM-ION,AGM, GEL any combination
• Different Capacities: ( example: 300Ah + 100Ah, 400Ah + 150Ah) it doesn't matter
• Different Ages: Brand new 2024/2025/2026 bank + aging 2019 bank, no problem.
KALION DUO™ monitors each bank independently and automatically switches between them based on YOUR voltage thresholds. Turn old batteries into backup power. Mix mismatched banks. Use what you already own instead of throwing it away.
.svg){kind=icon}
Intelligent Auto-Failover
Set your voltage thresholds on the touchscreen (e.g., "Switch to Bank 2 when Bank 1 drops below 44V"). KALION DUO™ monitors both banks 100 times per second and automatically switches when your primary bank reaches your set limit.
Zero downtime. Zero manual switching. Your load never loses power.
Built-in overcurrent protection, temperature monitoring and configurable alarms keep both banks safe from over-discharge or system failures
.svg){kind=icon}
Universal Voltage + Marine-Grade Build
One device works with 12V, 24V, AND 48V systems — auto-detection means you don't need separate models for different voltages. Perfect for RVs (12V/24V), boats (12V/24V), and off-grid solar (24V/48V).
IP54-rated enclosure withstands harsh marine and mobile environments. Corrosion-resistant terminals. Vibration-dampened design.
Operating temperature: -20°C to +60°C. Built for reliability
OLD WAY vs KALION™ WAY
The Old Way
Traditional dual-battery systems require matching banks (same chemistry,same capacity, same age). Manual switching means downtime when you change banks. Can't mix lithium + lead acid without expensive BMS. Old batteries get thrown away or sit unused.
The Kalion Duo™ Way
KALION DUO™ lets you mix ANY two banks (12V,24V48V ), different chemistries, different capacities, different ages. Automatic failover means zero downtime. Old battery banks become valuable backup power. One device, one intelligent solution.
.png)
TECH SPECS
75A per bank
10-60V DC Auto-Detect
3.95" Color Touchscreen
IP54 Enclosure
6 x M8 Terminals (90°)
Intelligent Failover
Use Cases
Everything You Need
Professional-gradedual-bank system, ready to install in 30 minutes
LIFESTYLE
.avif)
Development Timeline
KALION DUO™ is currently in its final engineering phase. Prototype completion in Q1 2026.
Join our email list to follow along with development updates, prototype testing, and be first to know when we launch on Kickstarter.
✓ Engineering design
Complete
✓ Patent filed
December 2024 (US 63/940,124)
→ Prototype build
Q4 2025
→ Kickstarter launch
Q1 2026
FAQs
Yes! KALION DUO™ is the first system designed to handle ALL three:
• Different Chemistries: Example: LiFePO4 + AGM, LI + GEL, any combination works
• Different Capacities: Example: 300Ah + 100Ah, 400Ah + 150Ah, doesn't matter
• Different Ages: Example: Brand new 2024/ 2025 + aging 2019, no problem
How? KALION DUO™ doesn't charge your batteries — it switches between them for
load supply. Each bank charges independently from your solar/shore power/alternator.
KALION DUO™ monitors each bank's voltage independently and switches which bank powers
your load based on YOUR thresholds.
This means you can:
• Use your old 2019 AGM bank with your new 2024/2025 lithium bank
• Mix a degraded 200Ah bank (now 140Ah effective) with a fresh 300Ah bank
• Combine different chemistries that would destroy each other if paralleled
As long as both banks are the same system voltage (both 12V, both 24V, or both 48V),
KALION DUO™ manages them safely and intelligently
No problem! KALION DUO™ monitors each bank independently. You set custom voltage thresholds for each bank on the touchscreen.
For example:
• Bank 1 (300Ah): Switch when voltage drops to 44V
• Bank 2 (100Ah): Switch when voltage drops to 42V
KALION DUO™ intelligently manages both banks based on YOUR preferences. Different capacities, different discharge curves, different chemistries — all handled automatically.
No. KALION DUO™ is not a BMS — it's an intelligent load switching system. Your lithium batteries still need their own BMS for cell balancing and protection. KALION DUO™ sits"above" your BMS and manages which battery bank powers your load.
Think of it this way:
• Your BMS protects individual cells in each battery
• KALION DUO™ manages which bank supplies power to your load
KALION DUO™ works with your existing BMS, not instead of it.
Manual battery switches require you to physically turn a knob when your primary bank is low. Problems with manual switches:
• You lose power during the 30-second switch
• You forget to switch until it's too late
• You have to constantly monitor voltage
KALION DUO™ monitors both banks 100 times per second and switches automatically based on your set thresholds. Zero downtime. Zero manual intervention. You set it once and forget it.
• 75A continuous per bank (150A total with dual banks active)
• 150A surge capacity (5 seconds) for motor starts and high-inrush loads
• 200A peak (1 second) for emergency headroom
This is enough for:
• 12V system: 900W continuous, 1.8kW surge
• 24V system: 1.8kW continuous, 3.6kW surge
• 48V system: 3.6kW continuous, 7.2kW surge
Perfect for RV air conditioners, marine systems, off-grid solar, and van life setups.
KALION DUO™ will disconnect the load to protect both banks from over-discharge(based on your configured thresholds). Before this happens, KALION DUO™ triggers visual and audible alarms to warn you:
• Touchscreen displays low voltage warning
• LED indicators flash
• Optional buzzer sounds
• WiFi/Bluetooth sends notification to your phone
You can configure multiple warning levels (e.g."Warn at 45V, disconnect at 42V")
to give yourself plenty of notice.
Victron Battery Protect ($130-180):
✓ Disconnects load when voltage drops
✗ Can't switch between two banks
✗ Can't handle different chemistries
✗ No monitoring of secondary bank
✗ Single voltage only (need separate 12V/24V/48V models)
Blue Sea Automatic Charging Relay ($150):
✓ Basic dual-battery isolation
✗ Designed for charging, not load management
✗ Can't mix chemistries intelligently
✗ No real-time monitoring or touchscreen
KALION DUO™ ($345 Early Bird):
✓ Intelligent switching between Bank 1 and Bank 2
✓ Works with ANY chemistry mix (LI, SODIUM-ION,AGM, GEL)
✓ Real-time monitoring of BOTH banks
✓ WiFi/Bluetooth + 3.95" touchscreen
✓ Auto-detects 12V/24V/48V (one model for all)
✓ Configurable failover logic per bank
KALION DUO™ is currently in prototype phase. Production units will undergo certification for:
• CE (European safety standards)
• FCC (electromagnetic interference)
• RoHS (hazardous substances)
• IP54 (dust/splash protection)
Marine-specific certifications (NMEA 2000, ABYC) are planned for post-launch. Early backers are helping us fund these certifications as part of the Indiegogo campaign.
Yes! KALION DUO's™ innovative dual-bank switching technology is patent pending (US Application 63/940,124, filed December 2024). Our load-side switching method that enables mixing different chemistries, capacities, and ages is the first of its kind and protected by intellectual property.
This means our unique approach—monitoring each battery bank independently and switching load delivery without parallel connections—cannot be copied by competitors. We're committed to protecting our innovation while bringing this breakthrough technology to market.
Still have questions?
Founder Pricing — Only 25 Spots Remaining!
Be one of 25 founding customers to get KALION DUO™ at 50% off ( Saving $345! )