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. 100% designed and manufactured in Switzerland, the variostring offers a 10-year warranty.
Safety guaranteed, thanks to the reinforced isolation between the PV generator and battery, allowing for independent earthing of the battery and/or solar modules
Safe, simple and trouble-free connection with SUNCLIX™ (Phoenix Contact “tool free”) PV connector
World champion for efficiency in isolated converter with >98 %
Reduces Balance of System costs (eliminates expensive wiring for parallel strings)
4 step charger fully programmable for longer battery life
Advanced battery accessories
bts 01
Temperature sensor
bsp
Advanced battery processor (lead-acid)
xcom CAN
Communication with lithium BMS
Display, datalogger, monitoring and communication
rcc 02/03
Configuration, display, datalogger
xcom LAN/GSM
Remote monitoring (Portal & App)
xcom 232i/CAN/485i
Communication bridges (openstuder)
Compatible accessories
vario
solar charge controller
xtender
battery inverter
arm 02
External auxiliary contacts module
Technical data
variostring vs70
Solar PV
| Max. solar power recommended (@STC) | 4200 W |
| Maximum current PV | 13 A |
| Max. solar open circuit voltage | 600 V |
| Min. solar functional circuit voltage | 100V |
| Recommended MPP voltage | 250 – 500 V |
Battery charger
| Max. output current | 70 A |
| Nominal battery voltage (Input range) | 48 V |
| Operating voltage range | 38 – 68 V |
| Battery grounding possibility | battery + or battery – |
| Max. standby consumption | < 20 mA (1 W) |
Electronic protections
| PV reverse polarity | ✔ |
| Overtemperature | ✔ |
| Reverse current at night | ✔ |
| Galvanic isolation | ✔ |
| PV grounding possibility | PV +, PV -, floating |
| Ground fault Protection | Programmable |
General data
| Weight | 5.51 kg |
| Dimensions h/w/l [mm] | 120 / 220 / 350 mm |
| Conformity | low voltage directive (LVD) 2014/35/EU, 62109-1, electromagnetic compliance (EMC) directive 2014/30/EU, 61000-3-3, 61000-6-2, 61000-6-4 |