Modular Battery Block
The Keystone Modular Battery Block is the foundation of a powerful, expandable energy storage system. With 6kWh of capacity per unit, these smart battery blocks are designed for seamless stacking, allowing you to scale up to 30kWh per inverter for maximum energy independence. Whether you’re optimizing your solar setup, preparing for grid outages, or reducing electricity costs, our modular system grows with your energy needs.
$6,600.00
Due Today:
$100.00
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Modular Battery Block
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Wield your power
Control your energy
Experience complete energy autonomy with seamless control at every level. Manage power effortlessly, with real-time insights and intuitive app control. Whether it's maximizing your energy savings, backing up essentials during an outage, or optimizing solar efficiency, our panel empowers you to do more.
Enjoy peace of mind knowing your home’s energy is in your hands. Monitor usage, control circuits remotely, and make instant adjustments whenever and wherever needed. Stay connected to every watt of your power and let your home work smarter for you.
Kora Home App
The Kora Home App gives you complete visibility into your home's energy use, down to the watt. See exactly how much power each circuit and appliance is using in real-time, so you can easily spot energy hogs and make smarter decisions to cut down on your electricity bill. The intuitive dashboard lets you track historical data and spot trends, giving you the insights you need to take control of your energy use. Plus, you'll get alerts for any unusual spikes in usage, helping you catch potential issues before they become costly problems.
Reads the room
Experience complete energy autonomy with seamless control at every level. Manage power effortlessly, with real-time insights and intuitive app control. Whether it's maximizing your energy savings, backing up essentials during an outage, or optimizing solar efficiency, our panel empowers you to do more.
Your power anywhere.
Visibility down to the watt
The Kora Home App gives you complete visibility into your home's energy use, down to the watt. See exactly how much power each circuit and appliance is using in real-time, so you can easily spot energy hogs and make smarter decisions to cut down on your electricity bill. The intuitive dashboard lets you track historical data and spot trends, giving you the insights you need to take control of your energy use. Plus, you'll get alerts for any unusual spikes in usage, helping you catch potential issues before they become costly problems.
Control every room
Take control of your entire home’s energy with the Kora App. Easily switch circuits on or off from anywhere, ensuring you're always in charge of what’s powered. Tailor each room to your needs with simple toggles, helping you save energy when and where it matters most. Whether it’s the EV charger, kitchen, or lights, you have the freedom to prioritize usage instantly. Designed for convenience, Kora lets you create a smarter, more adaptable energy routine in just a few taps.
Realtime usage & insights
Gain crystal-clear insights into your home’s energy flow with Kora. Track usage in real-time and see where every watt is going, from appliances to individual circuits. Get precise data on production, consumption, and export, so you can make informed decisions that cut waste and maximize savings. With dynamic visualizations and a seamless interface, you’ll have all the information needed to optimize your energy use instantly.
Keep savings top of mind
Save smarter with Kora’s personalized insights. The app empowers you to monitor usage trends and identify energy-hungry devices, helping you reduce costs without compromising comfort. Stay updated on your solar generation and battery performance to maximize efficiency and minimize expenses. By putting actionable insights at your fingertips, Kora makes achieving your savings goals easier than ever.
Stay in the know
Never miss a beat with Kora’s real-time alerts and updates. From power outages to unusual spikes in energy usage, you’ll receive instant notifications to keep you informed and in control. The app’s feed delivers daily and weekly summaries, helping you spot trends and stay ahead of potential issues. With Kora, you’ll always know how your home’s energy system is performing, ensuring peace of mind and reliability.
Your Power Anywhere.
Visibility down to the watt
Kora gives you birds-eye visibility into your home's energy use. Track every watt in real-time.
Control every room
Easily switch circuits on or off from anywhere, ensuring you're always in charge of what’s powered.
Realtime usage & insights
Track usage in real-time and see where every watt is going, from appliances to individual circuits.
Keep savings top of mind
Monitor usage trends and identify energy-hungry devices, helping you reduce costs not comfort.
Stay in the know
From power outages to unusual spikes in energy usage, we keep you informed and in control.
Tech Specs
Performance
Battery Cell Material
– Na-Ion (Sodium Ion)
Battery Capacity per Block
– 102.4V⎓60A, 6,144Wh
Battery Cycle Life
– The battery maintains an 80%+ SOH (State of Health) after 7,000 cycles at 0.5C/0.5C at 77°F
UPS
– Backup UPS <20ms; Online UPS 0ms
Communication
– Bluetooth & Wi-Fi & 4G
Input
AC Input
– Charging: 100-120V~15A; 200-240V~12.5A, 50/60Hz
– Bypass: 100-120V~15A, 50/60Hz (duration < 3hrs when the current exceeds 12A)
High Power Voltage Input (PV)
– 80-450V⎓15A max, 4,000W max
Low Power Voltage Input (Low-PV)
– 30-150V⎓15A max, 1,600W max
Output
DC Output
– 12.6V⎓30A, 378W max
Environment
Inverter Temperature
– Operating Temp: -4°F to 130°F
Battery Temperature
– Operating Temp: -40°F to 130°F
Noise Level
– <30 dB
IP Rating
– IP 65
Dimensions
Net Weight
– Inverter: 80lbs
– Battery: 111.8lbs
Dimensions
– Inverter: 27.2 × 18.9 × 8.4 in
– Battery: 26 × 18 × 8 in
FAQs
Please read our FAQs page to find out more.
What is the Kora Na-Ion Battery Stack, and how does it compare to Li-Ion?
The Na-Ion Battery Stack is a next-generation battery that offers better temperature stability, higher cycle life (>10,000 cycles), and lower environmental impact compared to lithium-ion.
Because of the unique tin anode chemistry used in Kora’s Na-Ion batteries, our batteries have a wider thermal range than a LFP battery, but have the same high cycle count, and no fire or thermal runaway risk.
What storage capacity options are available?
It is available in 6kWh blocks that can be stacked 5 times per inverter and daisy chained across as many as 4 inverters for a maximum system power of 120kWh.
Does the battery require active cooling?
No, the Na-Ion chemistry operates efficiently at a wider temperature range, reducing the need for complex cooling systems.
Can I expand my battery capacity over time?
Yes, the modular design allows users to add additional battery packs as energy needs grow, or use them in other systems like your RV or second home if they aren’t needed.
Is the battery safe from thermal runaway?
Yes, Na-Ion batteries are intrinsically safer than lithium-ion and do not suffer from thermal runaway risks.
How long does it take to charge the battery?
Technically a Kora Na-Ion battery has a 4C charge rating which is 4x faster than a 1C on a LFP battery like a Tesla Powerwall 3. What this means is it can charge 4x as fast, but to improve longevity we recommend not rapid charging it unless you absolutely need to for a storm or other reason. With that in mind, charging times vary, but the Na-Ion stack can fully charge in 2-4 hours, depending on inverter and grid conditions.
Is the battery compatible with my existing solar and inverter setup?
It depends. If you already have a solar inverter like from an old SunPower system, you can replace that solar inverter with a Kora hybrid inverter and manage both your solar, your batteries and your grid connection all from a single inverter.
Can I use the battery for off-grid applications?
Yes, the stack is designed for off-grid and hybrid energy systems, providing reliable storage even without grid access.
What is the expected lifespan of the Na-Ion Battery Stack?
With 10,000+ charge cycles, the battery stack has an expected lifespan of 25-30 years, far exceeding traditional lithium-ion systems.
What warranty does the Na-Ion Battery Stack come with?
The battery comes with a 10-year warranty, ensuring long-term reliability and performance.