Inverters, Battery Chargers and DC-DC Converters for Off-Grid Solar

List the loads that can run at the same time, add their running watts and divide by 0.8 for the continuous rating. Then make sure the surge rating covers the start-up of the largest motor or compressor. Above about 1–2 kW, a 24V or 48V battery bank keeps the current manageable.

Pure (true) sine wave inverters work with electronics, motors, compressors and chargers. Modified sine wave is cheaper but can cause noise, heat or malfunction in some motors and electronics. For mixed loads, choose true sine wave.

Yes, with a model whose datasheet lists a lithium curve. The NPB series offers a 2-stage curve for Li-ion (lithium iron and lithium manganese) batteries; set it to match the battery and BMS limits.

Higher voltage means lower current for the same power, so thinner cables and lower losses. 12V suits small RV and cabin systems, 24V mid-size systems, and 48V systems of a few kilowatts.

No. These inverters run from a battery. Solar panels must charge the battery through a charge controller, which is not part of our MEAN WELL catalog.

The NTU series is a true sine wave inverter with UPS function: it passes utility AC to the load and switches to battery power when the utility fails. Ask us for the transfer details of the model you need.

Use a DC-DC converter with a 48V-range input and 12V output from the SD, RSD or DDR series, sized at the 12V load ÷ 0.8. This avoids running small DC loads through the inverter.