Studer Hybrid Inverter System — Motorcycle Showroom, Bengaluru

Project Overview

Techedge designed and installed one of Bengaluru’s most capable commercial hybrid power systems — directly inside the showroom floor of a TVS motorcycle dealership. The system runs continuously behind the scenes: customers walk past motorcycles on display while Studer inverters and a LiFePO4 battery bank keep every load — air conditioning, lighting, billing, and display screens — running without interruption.

System at a glance:

• 6 × Studer Xtender XTM 3500-48 inverter/chargers — 2 per phase, 21 kVA total 3-phase output
• 10 × Studer VarioTrack VT-65 MPPT solar charge controllers — up to ~30 kW solar input
• 6-module Amaron e+ LiFePO4 battery rack — 48V, indoor-safe, BMS-integrated
• Main distribution board with MCB protection for load segregation
• Xcom-232 communication bus linking all inverters and charge controllers

Why Studer Xtender?

Studer Innotec (Switzerland) is among the world’s most advanced inverter/charger manufacturers — their Xtender series is used in telecom towers, hospitals, and mission-critical commercial facilities globally.

System Architecture

Inverter/Charger Array — 6 × Studer Xtender XTM 3500-48

Six Xtender units are wall-mounted in two rows of three — 2 units per phase across all three phases. Each pair is synchronised via the Xcom-232 communication bus to:

• Share load symmetrically within each phase
• Respond as a unified system to any grid outage (instant transfer)
• Coordinate battery charging current across all six chargers
• Report to a single monitoring interface

Phase configuration:

• Phase L1 → 2 × XTM 3500-48 → 7 kVA
• Phase L2 → 2 × XTM 3500-48 → 7 kVA
• Phase L3 → 2 × XTM 3500-48 → 7 kVA
• Total: 21 kVA balanced 3-phase output

This architecture allows the system to be scaled further — additional Xtender units can be added per phase without replacing any existing equipment.

Solar Charging — 10 × Studer VarioTrack VT-65 MPPT

The top row of the installation is a bank of 10 Studer VarioTrack VT-65 MPPT solar charge controllers. Each VT-65 handles:

• Up to 65A charge current at 48V → 3.12 kW per controller
• Solar array input up to 150V Voc
• Direct Xcom-232 integration with the Xtender inverter array

10 controllers × 3.12 kW = ~31 kW peak solar charging capacity — sized for a large rooftop array that significantly offsets the showroom’s daytime grid consumption.

During daylight, the VarioTrack bank prioritises solar for battery charging and load supply. At night or during cloud cover, the Xtender array seamlessly switches to grid or battery.

Battery Bank — 6-Module Amaron e+ LiFePO4 Rack

The Amaron e+ rack on the left holds 6 LiFePO4 battery modules in a vertical open-frame rack:

• Chemistry: Lithium Iron Phosphate (LiFePO4) — thermally stable, no off-gassing
• Cycle life: 4,000+ cycles at 80% DoD — 10+ years of daily discharge
• Usable DoD: 80% (vs. 50% for lead-acid) — significantly more runtime per kWh
• Built-in BMS: Cell balancing, over-temperature protection, short-circuit cutoff
• Indoor safety: No ventilation requirement — can be installed in occupied commercial spaces

The LiFePO4 chemistry was chosen over lead-acid specifically because this installation sits inside the showroom — no acid, no off-gassing, no maintenance, and no risk to customers or motorcycles on display.

Techedge Design Process

1 — Load Assessment and Phase Balancing

Techedge began with a full load audit of the showroom: measuring actual running amperes per phase across peak and off-peak hours, cataloguing individual loads (AC units, lighting circuits, service equipment, computers/POS terminals).

Phase balancing was then designed into the load distribution board to ensure:

• No single phase is overloaded
• Battery draw is symmetric across the inverter array
• Grid import is minimised during peak tariff hours

2 — Battery Bank Sizing

Battery capacity was calculated from:

• Critical load profile — the loads that must run on battery during a grid outage
• Target backup duration — hours of backup required for the showroom’s commercial continuity
• Cycle budget — daily cycling over 10 years at Bengaluru’s grid reliability profile

The Amaron e+ LiFePO4 chemistry was selected over lead-acid after a lifecycle cost comparison showed lower total cost of ownership over 10 years — even accounting for the higher upfront cost.

3 — Inverter Configuration and Programming

Each Studer unit was programmed via Studer VarioTrack/Xtender Studio software before installation:

• Grid charging current limits (to avoid overloading the site’s BESCOM connection)
• Battery charge profiles matched to Amaron e+ BMS parameters
• Load priority groups (critical loads on bypass vs. non-critical on grid-pass-through)
• Low battery voltage disconnect thresholds to protect cell longevity
• Grid voltage and frequency tolerance windows for Indian grid conditions

4 — Installation and Commissioning

The physical installation was executed in a single planned shutdown window to minimise disruption to showroom operations:

• Studer inverter/charger units wall-mounted on a rated structural bracket array
• Amaron e+ battery rack positioned adjacent with short DC cable runs (to minimise resistive losses)
• Studer Xcom-232 communication bus wired between all inverter units and charge controllers
• AC distribution: existing MCC board retrofitted with inverter output feeds and changeover protection
• RCC-02 remote control panel mounted at a visible service point
• Full commissioning test: grid failure simulation, load transfer timing, battery charge cycle verification

Capabilities Demonstrated

This installation represents Techedge’s full-stack capability in commercial hybrid power systems:

Why This Matters for Commercial Buyers

For any commercial establishment in Bengaluru — showrooms, warehouses, clinics, hotels — grid unreliability translates directly into lost revenue and customer dissatisfaction.

A Studer hybrid system addresses this at the engineering level:

• No generator dependency — battery backup handles typical urban outage durations without fuel cost or noise
• Seamless transfer — customers and staff don’t notice a power cut
• Solar-ready — MPPT controllers mean solar panels can be added at any time without replacing the inverter
• Serviceable — Swiss engineering, modular design, and Techedge’s on-call support means long-term reliability

About Techedge’s Studer Expertise

Techedge is among the few EPC teams in Bengaluru with hands-on Studer Xtender installation and commissioning experience. Our capabilities extend to:

• Single and 3-phase Studer Xtender systems (XTS, XTM, XTH series)
• VarioTrack and VarioString MPPT charge controllers (up to 120A, 200V array voltage)
• Studer communication infrastructure — Xcom-232, Xcom-LAN, RCC-02, BSP battery sensor
• LiFePO4 battery integration — Amaron e+, BYD, and compatible rack systems
• Grid-hybrid and off-grid configurations — UPS mode, self-consumption, peak shaving