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For 35 years, EnerTech has delivered reliable DC power solutions for power plants, substations and industries.
Our FCBC system powers critical loads while keeping batteries fully charged.
During power failure, batteries provide instant backup with zero changeover time.
Available from 24V to 360V DC, up to 800A in SCR and IGBT configurations.





| Feature | Specification |
|---|---|
| DC output range | 24V / 48V / 110V / 220V / 360V — up to 800A |
| Configuration | FCBC | Dual FCBC | Float + FCBC |
| Input supply | 1-Phase 230V AC or 3-Phase 415V AC, 50Hz |
| Phase | 1Ph–1Ph | 3Ph–3Ph |
| Converter technology | 3-phase 6-pulse thyristor (SCR) | single-phase half-controlled SCR | 2-switch forward SMPS / IGBT |
| Battery types supported | Lithium-Ion, Lead-Acid, VRLA, Ni-Cd |
| Control | 40-pin microcontroller — auto float/boost selection, charge start/stop, fault sensing & alarm annunciation |
A Float Cum Boost Battery Charger is an industrial DC power supply that continuously feeds a connected load and maintains a standby battery bank in a single, integrated panel. It is the standard solution wherever a load is too critical to tolerate even a momentary power break. Two charging modes are managed automatically:
The microcontroller selects boost mode, recharges the battery at the optimum rate, then automatically returns to float.

The battery is always in circuit, so a mains failure causes no interruption to the load. Ideal for protection, control and signalling circuits.

A high-end microcontroller selects modes, starts and stops charging, and prevents both deep discharge and overcharge — extending battery life and removing manual intervention.

From a single charger to fully duplicated dual-FCBC systems with automatic change-over and alarm, so availability scales to your criticality.

Pluggable PCBs, on-board test points and a comprehensive O&M manual with troubleshooting charts make servicing quick and predictable.

Full-wave fully-controlled rectification plus a dedicated P&I controller deliver stable, low-ripple output that protects sensitive electronics and instrumentation.

Overcurrent, overvoltage, short-circuit, phase-failure and phase-sequence-reversal protection guard both the charger and the connected battery bank.

Industrial enclosures up to IP65, transformer isolation and temperature-controlled cooling keep the system thermally stable in demanding environments.

Backed by EnerTech's 35-year manufacturing track record and pan-India service network.
| Configuration | Description | Best for |
|---|---|---|
| Single FCBC | One rectifier handles both float and boost duty. | Standard standby DC loads. |
| Configuration | Description | Best for |
|---|---|---|
| Float + Boost (Dual Rectifier) | Separate float and boost rectifiers. | Loads needing fast recharge while staying powered. |
| Dual FCBC (100% Redundant) | Two full chargers with automatic standby change-over. | High-availability / no single point of failure. |
| Dual FCBC (Parallel Operation) | Both chargers share load for higher capacity. | High-current DC buses. |
| 2 FCBC + 2 Battery Banks, single load bus | Fully duplicated source feeding one bus. | Mission-critical utility & power-plant DC systems. |
| Feature | Specification |
|---|---|
| Regulation | Full-wave fully-controlled rectifier for low inherent ripple; separate analogue P&I controller for transient response |
| Isolation | Transformer-based for complete galvanic isolation |
| Protection | Overcurrent, overvoltage, short circuit, deep-discharge, phase-fail & phase-sequence reversal |
| Cooling | Natural air cooled with provision for temperature-controlled forced-fan cooling |
| Display | LCD / LED with monitoring and diagnostics; PCB test points for fast troubleshooting |
| Enclosure | Industrial-grade, IP20 to IP65 (customisable) |
| Serviceability | Pluggable PCB / edge connectors for rapid module replacement |
| Warranty | Standard manufacturer warranty with pan-India service network |
EnerTech FCBC systems power critical DC loads across multiple industries requiring uninterrupted DC supply.
Thermal, hydro & solar power stations
Electrical substations & switchyards
Steel, cement & process plants
Petrochemical, oil & gas, and refineries
Telecom & signalling installations
Railways & metro infrastructure
Hospitals & healthcare facilities
Data centres & IT infrastructure
Educational & research institutions
Trusted DC power and energy-storage solutions with decades of engineering excellence, manufacturing expertise and nationwide support.
35+ years of DC power and energy-storage manufacturing.
35,000+ satisfied customers and 14,000+ installations across India.
Standard and fully customised DC solutions engineered to your SLD.
In-house design, manufacturing, type-testing and service.
Pan-India sales, commissioning and AMC support.
Delivering success through 35,000+ satisfied customers over the past 35 years with our impeccable Battery Energy Storage System Installation.









Trusted by industries, businesses, and institutions for reliable solar and energy storage solutions. Proven performance backed by decades of engineering excellence and customer confidence.
An FCBC is an industrial DC charger that simultaneously powers a critical load and keeps a standby battery fully charged. In normal operation it "floats" the battery; after a discharge it "boosts" the battery back to full charge — all automatically — providing uninterrupted DC power.
Float charging maintains a fully-charged battery at a steady low voltage to offset self-discharge during normal running. Boost charging applies a higher voltage to recharge a depleted battery quickly after a power outage, before the charger reverts to float mode.
Yes. Because the battery is permanently connected across the DC bus, the load is fed by the battery the instant mains fails — with zero changeover time and no voltage interruption.
EnerTech manufactures FCBC systems from 24V to 360V DC, with output current up to 800A, in single-phase (230V) and three-phase (415V) input versions. Ratings are customisable to your project.
The charger supports Lithium-Ion, Lead-Acid, VRLA and Ni-Cd battery banks, with charging parameters configured to the battery type.
Yes. EnerTech offers 100% redundant dual-FCBC systems with automatic change-over and alarm, as well as parallel-operation and dual-battery-bank configurations for the highest availability requirements.
A microcontroller automatically manages float/boost selection and charge start/stop, preventing both deep discharge and overcharging — the two main causes of premature battery failure. Built-in overcurrent, overvoltage and short-circuit protection safeguard the system.
They are deployed in power stations, substations, steel and cement plants, petrochemical and oil & gas facilities, telecom and railway signalling, hospitals, data centres and any application needing reliable, uninterrupted DC power.