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VarioString high voltage MPPT solar charge controller

The VarioString high voltage MPPT solar charge controller ensures an optimal charge of the battery maximizing the solar production. First of its kind, the VarioString achieves the highest conversion efficiency in the world from high voltage solar power (900V) to 48V battery voltage, including a galvanic isolation between the PV and battery....

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Solar Power System

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VarioString high voltage MPPT solar charge controller

Graphic details

70A-48V

PV Input 200 (min) to 600 Voc Maximize the energy generated from solar panels by adding a VarioString solar charge controller with maximum power point tracker (MPPT) to any solar installation.

An exceptional device

∙ Reduces Balance of System costs (eliminates expensive wiring for parallel strings)

∙ Safe, simple and trouble-free connection with SUNCLIX™ (Phoenix Contact “tool free”) PV

connector

∙ Safety guaranteed, thanks to the reinforced isolation between the PV generator and battery,

allowing for independent earthing of the battery and/or solar modules

∙ World champion for efficiency in isolated converter with >98 %

∙ Up to 15 VarioString in parallel on the same communication bus (105kW)

∙ 4 step charger fully programmable for longer battery life

∙ Low self-consumption: <1W in night time mode

∙ Display with 9 LEDs showing status and current

∙ Suitable for any solar and battery system

∙ Use with Bolanmu battery charger/inverter to synchronize battery management for optimal efficiency

Combine with a range of accessories

∙ Display, programming and data logging remote control (RCC-02/-03)

∙ Communication sets (Wifi model)

∙ Communication module (Xcom-232i/XcomCAN)

∙ Battery temperature sensor (BTS-01)

∙ Battery Status Processor (BSP)

∙ Communication with lithium battery BMS (Xcom-CAN)

∙ 2 additional auxiliary contacts (ARM-02)

	VS-70	VS-120
Electrical characteristics PV array side	MPPT	MPPT 1/2	1+2 in parallel	1+2 in series
Maximum solar power recommended(@STC)	4200 W	3500W	7000W	7000 W
Maximum current	13 A	13 A	26 A	13 A
Maximum solar open circuit voltage	600V	600V	600V	900V
Minimum solar functional circuit voltage	100V	100V	100V	200V
Recommended MPPT voltage	250-500V	250-500V	250-500V	500-750V
Electrical characteristics battery side
Maximum output current	70 A	60 A	120 A
Nominal battery voltages	48 V
Operating voltage range	38 - 68V
Battery grounding possibility	Battery + or battery -
Performances of the device
Maximum efficiency	>98%
MPPT efficiency	>98%
Maximum stand-by self-consumption	< 20 mA(1W)	<25 mA(1.25 W)
Charging stages	4 stages: Bulk,Absorption,Floating,Equalization Number of steps, thresholds, end current and times adjustable with the RCC-02/-03
Battery temperature compensation (with accessory BTS-01/BSP)	–3 mV /°C / cell (25°C ref) default value adjustable -8 to 0 mV /°C
Electronic protections
PV reverse polarity	√
Over temperature	√
Reverse current at night	√
Galvanic isolation	√
PV grounding possibility	PV +, PV -, floating
Ground fault Protection	Programmable
Environment
Operating ambient temperature range	–20 to 55°C
Humidity	100%	maximum 95 %, non-condensing
Ingress protection of enclosures	IP54	IP20
Mounting location	indoor
General data
Weight	5.51 kg	7.5 kg
Dimensions h/w/l[mm]	120 / 220 / 350	133 / 322 / 466
Solar generation connection(6mm²)	SUNCLIX™ (Phoenix Contact Tool Free)
Parallel operation (separated PV arrays)	Up to 15 devices
Max wire size	35 mm²	70 mm²
Glands	M 20 × 1,5	2 x PG21
Communication
Network cabling	Bolanmu communication BUS (included)
Configuration	RCC-02/-03, Internal DIP switches for basic settings
Data logging	With RCC-02/03, Xcom-232i on SD card · One point every minute
Accordance to standards
Conformity	Low Voltage Directive (LVD) 2014/35/EU: EN/IEC 62109-1 Electromagnetic Compliance (EMC) Directive 2014/30/EU: EN/IEC 61000-6-2, 61000-6-4