Mean Well ISI-501-148B True Sine Wave DC-AC Inverter 500W 110V out 12V in with MPPT Solar Charger

This model is a 500W true sine wave DC-AC inverter intended for battery-based power systems that need clean 110V AC output. It is a practical fit for off-grid, mobile, and backup applications where stable AC power and an integrated MPPT solar charger are useful. Its 1000W surge capability also helps with loads that draw a higher startup current.

Yes. The ISI-501-148B provides true sine wave output with total harmonic distortion below 3%, which is useful for running AC equipment that is sensitive to output waveform quality. Compared with modified sine wave units, this makes it better suited to electronics and other loads that benefit from cleaner power.

According to the provided specification, this inverter accepts a 42 to 60VDC input range and delivers 110V AC output. That means it is designed for higher-voltage DC battery systems rather than low-voltage 12V input applications. Buyers should match it to a system that falls within that stated DC input range.

Yes. The ISI-501-148B includes a built-in 500W MPPT solar charger, with typical MPPT efficiency listed at 98%. That built-in charger is a key differentiator for buyers who want inverter and solar charging functions in one unit.

The provided specification lists open and sealed lead acid batteries as the supported battery types. That makes it suitable for systems built around those lead acid battery chemistries. No other battery chemistry is stated in the provided product data.

It is rated for operation from -20°C to +40°C at 100% load, and up to 60°C at 50% load. That gives it usable range for cold and moderately hot environments, provided the load level stays within the stated limits. It also uses a thermostatically controlled cooling fan to help manage heat.

This model includes battery low alarm, battery low shutdown, over voltage, over temperature, output short, input polarity reverse, and overload protection. The overload rating is listed as 110% load for 60 seconds, with shutdown and recovery after re-powering. These protections help protect both the inverter and the connected power system during abnormal conditions.

The ISI-501-148B measures 205 x 158 x 67 mm and weighs 2.35 kg. The listed warranty period is 3 years. Those specs are useful for buyers evaluating panel space, enclosure fit, and long-term support expectations.