What Homeowners, Installers, and EPCs Truly Want from a BESS Manufacturer

The End of the “Specs-Only” Era

If a battery manufacturer is still selling by saying, “Our battery is 16kWh,” they are already out of the game.

Today’s energy storage market has entered a mature stage. In 2025, global installed storage capacity reached 106GW, a 46% year-on-year increase, and it is expected to hit 2TW by 2035. As the market rapidly expands, buyers are becoming more professional—and more demanding.

They no longer pay for impressive spec sheets. Instead, they pay for problem-solving—whether it’s safety concerns, installation efficiency, or total lifecycle cost.

Based on global customer feedback and industry data, one thing is clear: a great BESS manufacturer must design products around the real pain points of three key groups:

• Homeowners want safety and peace of mind 
• Installers want efficiency and zero rework 
• EPCs want compliance and strong returns 

Only manufacturers that satisfy all three will win the game.

The Homeowner Perspective: Ultimate Safety and Peace of Mind

For homeowners, a BESS is not a gadget—it’s a long-term investment tied to safety and household expenses.

Their concerns can be summed up simply:
fear of danger, fear of losing money, and fear of hassle.

Pain Point 1: Safety Anxiety — Zero Thermal Runaway Risk

Popular Google searches like “Is it safe to install a battery in the garage?” or “Can batteries catch fire?” reveal a very basic concern: safety.

With increasing reports of lithium battery fires, consumers are naturally cautious.

What homeowners want is absolute confidence in safety.

This means home energy storage manufacturers must move away from higher-risk NMC batteries and fully adopt LiFePO4 (LFP) chemistry, known for its excellent thermal stability—even under extreme conditions like puncture.

But material safety is only the baseline.

Top manufacturers must build multiple layers of physical protection, including:

• Explosion-proof valves for controlled pressure release
• Built-in aerosol fire suppression systems for early-stage fire control

Most importantly, these features must be visible and verifiable, supported by transparent design and certifications such as UL 9540A.

Pain Point 2: Hidden Costs and Long-Term Reliability — A True 15-Year Promise

Many homeowners focus only on upfront cost, overlooking the risk of expensive battery replacement in a few years.

A great manufacturer must convince users that the system will last the full lifecycle—not become a “deferred payment.”

That requires:

• 6000+ cycle life guarantees 
• Clear degradation warranty terms

But longevity isn’t just about cell quality—it depends heavily on smart system design.

A BMS with active balancing is critical. It continuously adjusts individual cell voltages, preventing the “weakest cell” problem from dragging down the entire pack.

Only when homeowners see stable battery health (SOH) over many years can their concerns about hidden costs truly disappear.

Pain Point 3: “Set It and Forget It” Smart Experience

Homeowners buy storage systems to save money—not to become engineers.

They want a system that works automatically after installation.

This requires:

• Intuitive touchscreen interfaces
• Stable WiFi connectivity

But the real key is software intelligence.

The system should automatically optimize charging and discharging based on time-of-use (TOU) pricing, without manual setup.

Advanced AI-powered energy management systems can even:

• Predict solar generation
• Forecast household energy usage
• Dynamically optimize energy strategy

Real-world cases show this can reduce electricity bills by up to 48%—allowing users to save money effortlessly.

The Installer Perspective: Fast Deployment and Zero Callbacks

Installers are the bridge between manufacturers and end users—and the ones who actually bring projects to life.

For them, time equals money, and rework equals loss.

Their priorities are simple:
easy to install, error-free, and no callbacks.

Pain Point 1: Complex Wiring and High Labor Costs

Installers fear projects that take an entire day—especially when wiring alone consumes hours and eats into profits.

In markets like Europe and the U.S., labor is expensive, making efficiency critical.

Highly integrated systems—such as all-in-one units or pre-wired modular designs—can reduce installation costs by up to 50%.

This requires thoughtful design:

• Slim wall-mounted structures
• Quick-install brackets
• Pre-configured wiring
• Plug-and-play connectors

A well-designed energy system should allow two people to complete installation—from unpacking to grid connection—in just a few hours.

Pain Point 2: Inverter Communication Issues

Errors like “BMS fault code 53” or “inverter connection failure” are common frustrations.

Energy storage systems involve multiple components—battery, inverter, EMS—and mismatched protocols can stall projects during commissioning.

The solution is:

• In-house developed and open BMS protocols 
• Pre-configured compatibility with 20+ major inverter brands (e.g., Victron, Deye, SMA, Growatt)

Installers should only need to select the inverter brand—everything else should work automatically.

This “factory-ready compatibility” is a key driver of installer satisfaction.

Pain Point 3: Costly On-Site Maintenance

Every after-sales visit is a direct loss for installers.

They need:

• Extremely low failure rates
• Strong remote diagnostics

Top bess manufacturers provide cloud-based monitoring platforms that allow installers to:

• View battery status and performance in real time
• Diagnose issues remotely
• Perform firmware upgrades without site visits

AI-based fault prediction can even detect issues before they occur—turning reactive maintenance into proactive management.

The EPC & Commercial Buyer Perspective: Scalability and Bankability

EPCs and commercial buyers deal with large-scale energy projects, where decision-making is driven by:

• Total Cost of Ownership (TCO)
• Compliance risk
• Financing feasibility

Their priorities can be summarized as:
certification, thermal control, and scalability.

Pain Point 1: Strict Compliance Requirements

Without certification, projects cannot proceed.

Key standards include:

• UL 9540 / UL 9540A (U.S.)
• IEC 62619 (Europe and global markets)
• NFPA 855 (fire safety requirements)

A top bess manufacturer must provide a complete compliance package.

System design must also integrate safety features such as:

• Targeted fire suppression at the pack level
• Proper site layout and safety distances

Only with full documentation can EPC projects move forward smoothly.

Pain Point 2: Thermal Management for Long Cycles

Commercial energy storage systems operate under heavy daily cycling, generating significant heat.

Poor thermal management leads to:

• Accelerated degradation
• Safety risks

Air cooling is no longer sufficient.

Liquid cooling BESS is becoming the industry standard, offering:

• Temperature differences within 2.5°C
• Longer battery lifespan
• Lower Levelized Cost of Energy (LCOE)

For EPCs, this means better reliability and stronger project returns (IRR).

Pain Point 3: Seamless Scalability

Energy demand grows over time.

A system that starts at 100kWh may need to scale to 500kWh or more.

Without flexible expansion, EPCs must redesign and rebuild—at high cost.

The solution is:

• Modular, stackable architecture
• Parallel capability on AC/DC sides

This allows systems to scale from kWh to MWh levels like building blocks—protecting long-term asset value.

The Manufacturer’s Blueprint: How Seplos Delivers

A top-tier manufacturer is not just a battery assembler—it is a translator of energy needs into hardware solutions.

Seplos achieves this through years of focus:

• 8 years of BMS development, including active balancing technology
• Mason residential series with built-in explosion-proof valves and aerosol fire suppression
• UltraPower commercial series with liquid cooling for compliance, safety, and performance

By addressing the real needs of homeowners, installers, and EPCs simultaneously, Seplos builds products that truly stand the test of time.

Build Your Energy Future with the Right Partner

Whether it’s a 5kWh home system or a 10MWh commercial project, the best system is the one that lets everyone sleep peacefully at night.

• For homeowners: safety and effortless automation
• For installers: fast installation and zero rework
• For EPCs: compliance and bankable assets

As the energy storage industry shifts from rapid expansion to refined execution, choosing a BESS manufacturer that truly understands your challenges matters far more than choosing one with better specs.