New Industry Products

Digitally-Controlled 500W Off-Grid True Sine Wave Solar Inverter

January 23, 2014 by Jeff Shepard

MEAN WELL Enterprises Co. Ltd. has introduced a 500W dc-ac true sine wave inverter with MPPT (Maximum Power Point Tracking) solar charger, the ISI-501 series. This off-grid solar inverter can be incorporated into an energy-saving power station by only adding external lead-acid batteries and solar panels. Through the built-in MPPT solar charger, "free energy" from the sun can be stored into the battery bank by solar panels and then transformed to ac output via its inverter stage, which can conserve the energy consumption. ISI-501 series can provide 500W rated power continuously (450W for 12Vdc output) for all kinds of electric devices. Peak load capability includes 110% of rated power for 1 minute and high surge power up to 200% of rated value for 30 utility cycles.

Digitally-controlled by a microprocessor and designed by high-frequency operation, ISI-501 is light weight and provides up to 88% efficiency. The output voltage and frequency can be flexibly adjusted through the front panel according to the demands of the installation. These power inverters are equipped with complete protection functions, include input reverse polarity, BAT low alarm, BAT low shutdown, BAT over-voltage for the input side; and short-circuit, inverter overload, and over-temperature protection for the output side.

Other standard functions include remote ON/OFF control, LED indicator for operational status and battery status, BAT low relay contact signal, built-in fan on-off control capability, and more. The design of ISI-501 series comply with global certificates per CE and FCC, which are suitable for powering all kinds of lighting fixtures, household appliances, and portable equipments in the remote mountains, islands, desert areas, or caravans that the utility supply can’t be reached but the solar panels can be constructed.

Additional features and specifications include: Selectable dc input voltage of 12-, 24-, or 48-Vdc; AC output voltage of either 100/110/115/120 or 200/220/230/240 Vac; True sine wave output (THD less than 3%); surge capability up to 1,000W; Adjustable output voltage and frequency; and dimensions of (L x W x H): 205mmx 158mmx 67mm.