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- A&S Power Supply Co.,Ltd
- Address:469, Xinsheng Road, Gaoxin District, Chengdu, Sichuan, China
- Tel:+86-28-65376776
- Fax:+86-28-86129221
- Email:inverter@electrical8.com
- Contact Person:Karina
SAM Solar Inverters without Transformer SMA PV OFFSET BOX

Certain kinds of PV modules are subject to power degradation when exposed to negative voltage to ground (polarization). The PV Offset Box maintains the performance capability of these modules even if they have inverters that cannot be grounded. If the degradation has already started, the device helps to regenerate the modules. The PV Offset Box is designed for inverters up to 1,000 V. Operation with all PV array components (PV modules, cables, inverters) has to be released by the respective manufacturer.
Economical
Low power consumption
Maintainance of performancecapability
Regeneration of PV modulesaffected by PID
Flexible
Different operating modes, as nightoperation, continuous operation
Ideal for transformerless inverters
Simple
Fully automatic operation
Integrated function control
-PV array / inverter input
Max. PV voltage 1000 V
Min. MPP voltage (in feed-in operation of the inverter) 75 V
Max. PV voltage (in offset operation) 50 V
Min. system voltage (V) of all components 400 V
Min. insulation resistance 200 kΩ
Output voltage to ground 400 V to 1000 V
Max. output current 3.3 mA
-Grid (AC)
Nominal AC voltage 100 V to 240 V
Nominal AC grid frequency 50 Hz to 60 Hz
Power consumption in standby operation < 0.5 W
Typical power consumption in operation 3 W
-General data
Dimensions (W / H / D) 270 / 230 / 100 mm(10.6 / 9.0 / 3.9 inches)
Weight 1.4 kg(3.08 lb)
Operating temperature range −25 °C to +60 °C(−13 °F to +140 °F)
Indoor / outdoor installation (IP65) yes / yes
-Features
PV connection (spring clamp terminal for cables up to 6 mm²) PV (–) / PVA (+) / PVB (+)
AC-connection (spring type clamp for cables up to 1.5 mm²) IN: N / L / FEOUT: N / L / FE
LED display: operation green
LED display: failure red
Warranty 5 years
Certificates and approvals www.SMA.de
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