BESS Systems Disrupt Industry and Redefine Energy Management in Chile

For decades, the cost of electrical energy was treated as a fixed and uncontrollable variable for industry. BESS systems changed that: today it is possible to significantly reduce the electricity bill without modifying the production process.

Why energy became a strategic problem

Chile has an electrical grid with high penetration of renewable energy, especially solar and wind. That should translate into cheap energy — and in part it does, during hours of high generation. But the Chilean tariff structure includes peak power charges calculated on the maximum demand recorded in the month, regardless of how much total energy is consumed.

The result is paradoxical: a company can consume the same amount of energy in two months and pay very different bills, depending on whether it had high demand peaks or not. A machinery startup, an air conditioning system at maximum, a production line at full load — any high-demand event, even if it lasts minutes, can increase the entire bill for that period.

How a BESS system works

BESS stands for Battery Energy Storage System. In simple terms, it works like a large-capacity industrial battery that operates in two phases:

• Charging (off-peak hours): during early morning hours, weekends, or low-tariff moments, the system charges its batteries with cheap energy from the grid.
• Discharging (peak hours): during hours of highest demand and highest tariff — typically between 6:00 PM and 10:00 PM in the Chilean system — the BESS releases stored energy, reducing the demand the company draws from the grid and therefore the peak power charge.

This operation, called peak shaving, directly reduces the maximum recorded power charge. Additionally, tariff arbitrage — buying cheap energy and avoiding expensive energy with stored power — reduces the average cost per kWh consumed.

The role of the EMS with artificial intelligence

A BESS system does not operate on timers alone. To maximize savings, it needs to make real-time decisions: when to charge, when to discharge, how much energy to reserve for backup versus how much to allocate for peak shaving, how to react to unexpected variations in demand.

Those decisions are made by the Energy Management System (EMS) — the software that controls the BESS. The CESC systems that Cynersis implements include a proprietary EMS with artificial intelligence that learns the organization's consumption pattern, anticipates peaks, and optimizes operation autonomously, without operator intervention.

Beyond savings: backup against outages

Peak shaving and tariff arbitrage are the main economic benefits. But BESS systems have a third relevant use case for critical operations: energy backup.

In the event of a supply outage, a BESS detects the interruption and switches in milliseconds, maintaining operation without interruption until supply is restored. For industries where an outage means production loss, product damage, or risk to people, this capability has a value that goes beyond savings on the bill.

What type of organization makes sense for

A BESS generates greater return where there is greater savings opportunity. Organizations with the best profile are those with:

• AT tariffs with significant peak demand charges
• High consumption variability or processes with high-power startups
• Operation during peak hours (evening-night) with intensive consumption
• Operational continuity requirements against outages
• Energy efficiency commitments or corporate sustainability goals

Manufacturing industry, data centers, supermarkets and retailers, hospitals, medium-scale mining, high-occupancy corporate buildings — all are candidates with calculable paybacks before investment.

The Cynersis process: engineering before proposing

The most common mistake in BESS adoption is sizing the system without analyzing the organization's real consumption profile. An undersized system does not capture all available savings. An oversized one generates unnecessary investment with extended payback.

The Cynersis process starts with the energy assessment — analysis of bills, peak demands, and tariff structure — before proposing any system. The conceptual engineering delivers the correct BESS size, the estimated month-by-month savings, and the projected payback. The client decides with real numbers, not generic promises.