Our company stopped production of this product and accessories in 2018 and its support ends on 12/31/2023. After this date, we will provide post-warranty product service only to a very limited extent, according to the type of fault and available spare parts. We will also not provide support and futher advice for existing applications. Thank you for understanding.

The aim of VONSCH developers was to produce highly reliable, true sine wave inverter with high efficiency and long durability.

FOTO CONTROL 1f 230/48 DC is an inverter for small systems designed to cover own household consumption.

FOTO CONTROL 1f 230/48 DC is designed to convert the DC voltage from the energy accumulator to the single-phase sine wave voltage in the own distribution grid.

FOTO CONTROL 1f 230/48 DC is designed as an HF transformer inverter with power rating of 2000 VA.

Inverter is designed to produce single-phase voltage with an amplitude of 230 V AC and frequency of 50 Hz in off-grid operation.

FOTO CONTROL 1f 230/48 DC is able to work in a wide range of input voltage - voltage of battery, while ensuring the required quality of output voltage.

The advantages of FOTO CONTROL 1f 230/48 DC are low noise, high efficiency, the possibility of extending to three-phase system (operation of multiple inverters) and the possibility of integrating new perspective features. Software required for seamless connectivity to computer is freely available for download in the "support" section at

The main advantages of using FOTO CONTROL FOTO CONTROL 1f 230/48 DC:

Communication possibilities:


Rated permanent power PN = 2000 VA at ambient temperature TA = 25 °C
Output power derating behaviour * Power PN is reduced with increasing ambient temperature
Output voltage 1 x 230V AC ±10%
Output voltage waveform sine wave
Total harmonic distortion of the output current (THDi) Max. 3 % at rated AC current
Output frequency 50 Hz ± 2%
Rated battery voltage VBAT 48 V DC
Operating DC voltage range 42 - 64 V DC
Rated input DC current 44.8 A
Rated output current AC 8.7 A
RFI filter Inbuilt input DC RFI filter and output AC RFI filter
Control system DSP Texas Instruments
Communication Modbus RTU – RS485
Output power relay YES
Time of switch off at fault ≤ 10 ms
Inverter dimensions w x h x d, weight 254 x 500 x 145 mm, 9.6 kg
Display graphical, monochromatic
Peak / Euro efficiency 95% / 94.4%
Protections Current overloading, Protections undervoltage, overvoltage , short circuit on the AC side , overheating of the inverter
Cooling Natural air cooling, forced by inbuilt fan when necessary
Absolute altitude of the permitted usage ≤ 1000 m above the sea, 1% reduction of power for every 100 m above 1000 m. The installation site altitude in operation is from 0 to 2500 m.
Relative air humidity ≤ 95 % without corrosive and explosive gases, without water vapor and condensates
Ambient working temperature TA + 2 °C to + 55 °C     * (+25 °C –> 2000 VA, +40 °C –> 1500 VA , +55 °C –> 700 VA)
Cover IP23 (OPTION IP43)
Storage ambient temperature - 20 °C ~ + 70 °C
Standards compliance Safety: EN 50178 EMC emissions: EN 61000-6-3 EMC immunity: EN 61000-6-1 Harmonic distortion: EN 61000–3–11, EN 61000–3–12
Instructions EEC 2004/108/EEC, 2006/ 95/EEC



RM GRID MONITOR is a device for FOTO CONTROL 1f inverters used for voltage and current measuring at the point of coupling to the electrical grid. RM GRID MONITOR
The RM GRID MONITOR module is physically installed in the household switchboard. When connecting the inverter with the RM GRID MONITOR extension module, power and current at the inlet to the building are measured. Depending on this, it can be very easy and effective to regulate the power of the hybrid inverter. The inverter is also connected to the power supply (48V battery, wind turbine, etc.). According to the current state of energy flow, inverter is set to maximize solar energy share and it can be set to ensure zero grid injection (depends on local legislative).


RM-SYNC module can be connected to FOTO CONTROL 1f inverters. RM SYNC


The module RM-WEBi can be connected to FOTO CONTROL 1f inverters and FOTO CHARGER solar chargers to provide visualization of data from the devices through a web page on the local network. Website is compatible with most commonly used browsers. This page is also compatible with mobile devices like smartphones and tablets. RM-WEBi To access the Internet, it is necessary to ask for the public IP address at your Internet service provider or administrator and configure redirection in the local router.


Datasheet in PDF for download.