So I've finally got my off-grid setup at the point where I'm actually cooking on it, but I'm running into a frustrating issue. I've got a Victron MultiPlus 24/2000 (the 24V, 2000VA unit) paired with 200Ah of lithium, and whenever I crank my induction hob (a cheap Duxtop single ring, rated at 1800W) past about the halfway power setting, the inverter trips on overload within a minute or two. The Victron is rated for a 4000W surge so I assumed it would handle the hob's startup spike, and it does — it's the sustained draw that seems to be the problem.
I've been through the settings in VEConfigure and I know the MultiPlus has a PowerControl / PowerAssist feature, but I haven't wired in shore power here (it's a static off-grid shed setup), so PowerAssist isn't really doing anything useful for me. I'm wondering if the inverter is just being conservative with its thermal limits, especially as the ambient temperature in the shed has been fairly warm lately — we've had a decent stretch of weather for once.
Has anyone managed to get a 1800W induction hob running reliably on a 2000VA MultiPlus, or is this basically asking too much of it? I'm trying to work out whether it's a settings issue, a temperature derating issue, or whether I just need to accept that a single-ring hob needs to be kept below 1500W on this unit. Any experience welcome.