Studer·SKU TSS-STUDER-VARIOSTRING-VS-120

Studer VarioString VS-120 Dual MPPT Solar Charge Controller

₦500,000~~₦850,000~~

In stock at Victoria Island, ready for pickup

The Studer VarioString VS-120 is a dual MPPT solar charge controller rated 120A at 48V, delivering up to 7kW per unit. Its two fully isolated MPPT inputs can be wired independently or in parallel (2 x 3.5kWp, 200-600Voc) or in series (7kWp, 400-900Voc), giving great flexibility in string design and reducing balance-of-system costs. Tool-free SUNCLIX PV connectors, full isolation between PV and battery, programmable ground fault protection and protection against incorrect wiring make installation safe and simple. Best-in-class tracking gives MPPT efficiency >99% with >98% conversion efficiency, while night self-consumption stays below 1.25W. A fully programmable 4-stage charger (Bulk, Absorption, Float, Equalization) and 9 status LEDs support long battery life, and up to 15 units can be paralleled for 105kW. It integrates with Studer Xtender systems for synchronized battery management, with display, programming and data logging via the optional RCC-02/-03 and web access through Xcom-LAN or Xcom-GSM.

Maximum output current (battery):120A (60A/MPPT)
Nominal battery voltage:48V
Operating voltage range:38-68V
Maximum solar power recommended (@STC):MPPT 1: 3500W / MPPT 2: 3500W / 1+2 in parallel: 7000W / 1+2 in series: 7000W
Maximum PV current:MPPT 1: 13A / MPPT 2: 13A / 1+2 in parallel: 26A / 1+2 in series: 13A
Maximum open circuit voltage:MPPT 1: 600V / MPPT 2: 600V / 1+2 in parallel: 600V / 1+2 in series: 900V

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Pickup at Victoria Island. Collect from 273A Kofo Abayomi Street once your transfer is confirmed.
Pay by bank transfer. Invoice and account details sent to your WhatsApp after you order.
Installation available. Our engineers install and commission. Request a system quote.
Datasheet. Download the manufacturer PDF (2888 KB).

Specifications

Maximum output current (battery): 120A (60A/MPPT)
Nominal battery voltage: 48V
Operating voltage range: 38-68V
Maximum solar power recommended (@STC): MPPT 1: 3500W / MPPT 2: 3500W / 1+2 in parallel: 7000W / 1+2 in series: 7000W
Maximum PV current: MPPT 1: 13A / MPPT 2: 13A / 1+2 in parallel: 26A / 1+2 in series: 13A
Maximum open circuit voltage: MPPT 1: 600V / MPPT 2: 600V / 1+2 in parallel: 600V / 1+2 in series: 900V
Minimum functional circuit voltage: MPPT 1: 200V / MPPT 2: 200V / 1+2 in parallel: 200V / 1+2 in series: 400V
Recommended MPP voltage: MPPT 1: 250-500V / MPPT 2: 250-500V / 1+2 in parallel: 250-500V / 1+2 in series: 500-750V
Galvanic isolation: yes
Maximum efficiency: >98%
MPPT efficiency: >99%
PV grounding possibility: PV pos, PV neg, floating
Battery grounding possibility: Battery pos or battery neg
Ground fault protection: Programmable
Charging stages: 4 stages: Bulk, Absorption, Float, Equalization
Battery temperature compensation: -3mV/°C/cell default value, adjustable -8 to 0mV/°C (available with accessory BTS-01)
Stand-by self consumption (night): 25mA (1,25W)
Remote temperature sensor (optional): BTS-01 or BSP 500/1200
Electronic protections: PV reverse polarity, over temperature, reverse current at night - Protected
Parallel capability: Up to 15 units in parallel: 105kW
Network cabling: Studer communication bus
Remote control and display: RCC-02/03 / Xcom-232i
Menu languages: English/French/German/Spanish
Data logging: With RCC-02/03 on SD card - one point every minute
Operating ambient temperature range: -20 à 55°C
Humidity: maximum 95%, non-condensing
Ingress protection of enclosure: IP20
Mounting location: Indoor
Weight: 7.5kg
Dimensions h/w/l: 133/322/466 mm