This is an automated archive made by the Lemmit Bot.

The original was posted on /r/offgrid by /u/EditorAny698 on 2025-10-26 12:21:23+00:00.

I’m looking to add a mini split heat pump to our cabin for some much-needed AC in the summer, but I’m trying to figure out if my solar system can handle it.

My setup is a 48V system with 3000W of panels and a 10kWh LiFePO4 battery bank. I’m looking at a high-efficiency model, specifically this 18000 BTU Costway unit with a 19 SEER rating: https://www.costway.com/18000-btu-208-230v-mini-split-air-conditioner-with-19-seer-heater.html

The running wattage seems manageable during the day, but I’m worried about the initial startup surge hitting my inverter too hard, especially if other loads are running.

For those of you running a similar-sized mini split, what has your real-world experience been with the power draw? I need to know how big that initial surge is and how much it actually pulls from the batteries overnight.