Active Balancers: Why Syrex Outperforms Deye

When choosing an energy storage battery system, the key factor determining longevity is the type of balancing used in the BMS (Battery Management System). Syrex batteries have a decisive advantage over Deye thanks to their use of active balancers.

What Is an Active Balancer and Why Is It Important?

An active balancer is an intelligent system that redistributes energy between battery cells: it takes excess charge from more charged cells and transfers it to less charged ones. This process runs continuously — during both charging and discharging.

Unlike passive balancers, which simply burn excess energy as heat and operate only at the final stage of charging, active balancers work with high efficiency and deliver:

• Extended battery lifespan through uniform wear of all cells;

• Increased usable capacity — all energy is utilized, not wasted;

• Timely imbalance detection through mobile apps with real-time parameter adjustments.

Deye: Passive Balancing — Limitations and Risks

Deye batteries use passive balancing with significant limitations:

• Only works at the end of charging — no balancing during discharge or at low currents;

• Low balancing current (~40–60 mA) vs. 1–2A in Syrex — equalization takes hours;

• Energy wasted as heat — reduces overall system efficiency.

Deye claims up to 6000 cycles at 100% DoD. However, with passive balancing's limited capabilities, real-world lifespan often falls short — weaker cells degrade faster, limiting the entire battery pack's capacity.

Why Syrex Is Better and More Reliable

Syrex batteries equipped with active balancers deliver clear advantages:

Conclusion

Active balancing is a technology that directly impacts battery lifespan and efficiency. Syrex batteries with advanced active balancing deliver longer service life, superior reliability, and minimal energy losses, making them the better choice compared to Deye, which relies on outdated passive balancing technology.