Need help re chest freezer

[lake superior]

My brother-in-law hooked up a 4.7 cu ft chest freezer to run on solar with a 110w panel, a 60A charge controller, four 12v 105Ah batteries in parallel, and a 1500w inverter. He also tried 500w and 750w inverters before, but every time, the inverter trips and shuts down with the fault light on. He's wondering what he might be missing or if there's something simple he's overlooked. Well, for one, he isn't tech-savvy so I'm out here doing his forum fishing for him. Send help? Trying to score some aura points because I want to pitch something to him.

 

[caravan]

My brother-in-law hooked up a 4.7 cu ft chest freezer to run on solar with a 110w panel, a 60A charge controller, four 12v 105Ah batteries in parallel, and a 1500w inverter. He also tried 500w and 750w inverters before, but every time, the inverter trips and shuts down with the fault light on. He's wondering what he might be missing or if there's something simple he's overlooked. Well, for one, he isn't tech-savvy so I'm out here doing his forum fishing for him. Send help? Trying to score some aura points because I want to pitch something to him.

Hahaha. Nice sucking up to your brother in law. I bet the freezer's startup surge is nuking the inverter. I think that causes spikes way higher than their running watts. Tell him to try a pure sine wave inverter with solid surge capacity, 3x rated watts at least. And good luck with that pitch!

 

[cabinet_]

Why does the inverter keep faulting, could the startup surge of the freezer be exceeding the inverter's peak load rating even if the running watts look fine?

 

[Coops]

Been down that road helping my uncle run a freezer off-grid, the startup surge was way higher than expected, those compressors can spike hard. A 1500W inverter sounds okay on paper, but if it doesn't handle surge well, it'll trip. We fixed it by switching to a pure sine wave inverter with higher surge capacity and shortening the cable runs, it worked like a charm after that.