Empowering Homes and Industries with Scalable Energy Storage
From 5kWh residential backup to MWh-grade C&I solutions. Safe, Smart, and Certified (UL/IEC) LiFePO4 battery technology engineered for maximum reliability.
Reliable Power for Your Home
Secure your home’s energy independence with our advanced residential systems. Featuring 10-Year Warranties, Indoor Safety compliance, and compatibility with major Tax Incentives.
All-in-one 5KW + 9.6kWh ESS
Compact integrated inverter and battery system ideal for standard residential backup and self-consumption.
10kW+20kWh Split ESS
High-capacity split system designed for larger homes requiring substantial off-grid capability and heavy load support.
LV/HV Stackable Battery
Modular battery banks allowing flexible capacity expansion from 5kWh up to 30kWh as your energy needs grow.
High-Efficiency Storage for Commercial & Industrial
Engineered for grid operators and commercial facilities, our C&I solutions provide robust peak shaving, load shifting, and emergency backup at scale.
HV Battery Module (76.8V/100Ah)
High-voltage architecture for maximized efficiency and reduced transmission losses.
Outdoor All-in-one ESS
IP65 rated enclosures for harsh environment deployment without additional shelter.
Liquid Cooled ESS (20′ Container)
Utility-scale storage with advanced thermal management for extended lifespan.
Engineering Excellence
Safety Certified
Stringent UL and IEC certifications ensuring maximum operational safety.
Intelligent BMS
Advanced Battery Management System for real-time monitoring and optimization.
Scalable Design
Modular architecture allows seamless capacity expansion without downtime.
Global Standards
Engineered to meet diverse international grid compliance requirements.
Frequently Asked Questions: ESS for Residential & C&I
1. What is a Residential and C&I Energy Storage System (ESS) and how does it work?
A Battery Energy Storage System (BESS) for residential and Commercial & Industrial (C&I) applications stores electricity—typically generated from solar panels or the grid—using safe Lithium Iron Phosphate (LiFePO4) batteries. For homes, a residential energy storage system maximizes solar self-consumption and provides backup power during outages. For businesses, a C&I ESS performs peak shaving and demand response to lower electricity bills. The system is managed by an intelligent Battery Management System (BMS) that controls charging, discharging, and grid interaction automatically.
2. Why is LiFePO4 the preferred battery chemistry for residential solar energy storage?
LiFePO4 (Lithium Iron Phosphate) is the safest and most reliable lithium-ion chemistry for residential solar energy storage. Unlike other chemistries, it is non-toxic, non-hazardous, and inherently resistant to thermal runaway, making it safe for indoor installation. Additionally, it offers superior longevity with a cycle life of over 6,000 cycles at 80% DOD, ensuring decades of reliable performance and a higher Return on Investment (ROI).
3. Can I expand my residential battery storage capacity in the future?
Yes. FNS Power’s residential ESS features a highly scalable design. Our Low Voltage (LV) EnerStack Battery and High Voltage (HV) Stackable Battery Storage Systems use a modular architecture. Starting from a single 5.12kWh module, you can easily expand capacity up to 30.72kWh by simply stacking additional modules. The wireless connection and plug-and-play design mean no internal wiring is required, making installation and expansion incredibly fast.
4. What are the main benefits of an All-in-One Residential Energy Storage System?
An All-in-One ESS, like the FNS Power Gripline G5-10, integrates a hybrid solar/battery inverter and LiFePO4 batteries into a single unit. Key benefits include:
- Faster Installation: Up to 2x faster than separate component systems.
- Smart Backup: Automatically detects grid outages and provides seamless home backup power.
- Cost Savings: Optimized for Time-of-Use (TOU) rates, zero export, and peak shaving.
- Remote Monitoring: Manage your system from anywhere via an intelligent APP.
5. How does a C&I Energy Storage System reduce operational costs for businesses?
A Commercial & Industrial (C&I) ESS allows businesses to avoid expensive peak-demand charges through peak shaving and load shifting. By storing energy when grid rates are low and discharging during peak hours, companies significantly lower their demand charges. Furthermore, our outdoor all-in-one ESS supports demand response programs and ensures uninterrupted power for critical facilities, with capacities ranging from 200kWh to above 1MWh.
6. Are FNS Power’s residential and C&I battery storage systems certified for global markets?
Absolutely. All our battery energy storage systems undergo rigorous safety testing and hold major international certifications, including UL1642, UL1973, UL9540A, IEC62619, CE, CB, and UN38.3. For grid interaction, our inverters comply with global standards such as UL1741SA, IEEE1547, Rule21, VDE0126, and AS4777, ensuring seamless and safe integration in North America, Europe, and Australia.
7. Is a residential battery energy storage system eligible for tax incentives and credits?
Yes, installing a qualified residential clean energy battery storage system can make you eligible for significant financial incentives, such as the federal Investment Tax Credit (ITC) and state-specific programs like SGIP in California. To qualify for the IRS residential clean energy credit, the battery must have a minimum capacity of 3kWh. FNS Power’s systems, starting from 4.8kWh, comfortably exceed this requirement, helping homeowners achieve a faster payback period.
8. How does the BMS and active balancing technology improve battery lifespan?
The intelligent BMS (Battery Management System) is the brain of the ESS. FNS Power utilizes active balancing technology in both residential and C&I systems, which continuously equalizes the charge across all battery cells. This prevents capacity attenuation, reduces heat generation, and extends the overall cycle life of the LFP battery modules. It also enables advanced features like remote updates and the ability to mix old and new battery packs safely.
9. What cooling and fire protection mechanisms are used in C&I Outdoor ESS containers?
Our large-scale C&I Outdoor Energy Storage Systems (up to 5MWh) are engineered for maximum safety and longevity. They feature:
- Thermal Management: Intelligent air cooling or liquid cooling systems maintain a temperature difference of less than 3°C across battery cells.
- Active Fire Protection: PACK-level active fire suppression using perfluorohexane and water-based fire protection systems.
- Durable Enclosure: IP54/IP55 protection rating with C3/C4 corrosion protection for harsh outdoor environments.
10. Can the residential ESS integrate with a diesel generator for off-grid applications?
Yes. For homeowners requiring complete energy independence, FNS Power’s split-phase hybrid inverters and off-grid solar systems fully support diesel generator access. This creates a robust microgrid where the solar panels, battery storage, and generator work together seamlessly, ensuring that your home has whole home backup power even during extended periods of low sunlight or severe weather conditions.