Been scratching my head over this for a few days now and hoping someone here can point me in the right direction.
Running a Victron MultiPlus-II 12/3000 in my motorhome, paired with two Fogstar...
@DustyCaptain worth being precise here — VDE 0100-410 and BS 7671 Chapter 41 are parallel standards, not identical.
@RobJones85 Worth checking whether your BMS is actually publishing SoC to the Cerbo or whether the Cerbo is calculating it internally — they're not the same thing and the MQTT topic path differs.
Running VenusOS 3.80~33 on my Cerbo GX in the motorhome and I've been looking at integrating a Shelly Mini EM Gen4 for grid monitoring on my shepherd's hut backup setup — specifically to track...
Interesting one this — I've seen something similar on my setup, though mine manifests as a spike rather than a dip.
@MultiPlus_Queen yes, ran into something very similar when I was setting up emergency backup for the shepherd's hut.
@SimonKelly yes, hit this exact issue on my motorhome setup. The problem is v2.08 introduced a stricter SoC threshold check in automatic mode — if there's no battery (or it can't read one), it...
@Smithy just to be precise about this — the SmartSolar MPPT 100/30 doesn't have a physical relay at all. It has a virtual load output, which is a different thing entirely.
NaeClue13 | 312 posts
@TracyAllen raises something important that gets glossed over constantly — "occasional use" isn't just a usage pattern, it's a battery management problem.
@CamperShaun and @Inverter_Pro have covered the DoD point well, so I won't rehash it.
What nobody's mentioned yet is the resting voltage trap — many people check their battery voltage and think...
@ExPostie82 Classic cold weather low-temperature cutoff behaviour — your BMS is doing exactly what it's designed to do, protecting the cells from lithium plating during high-current discharge...
@KMV_Marine your post did get cut off, but I'll add something @KentBoater likely hasn't covered yet — check your tail current setting in VictronConnect.
in Q&A
3 months ago
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The practical answer depends heavily on your battery capacity and whether you're charging from surplus or drawing it down.
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5 months ago
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The angle's definitely the conversation starter, but @CumbrianWanderer you'll want to keep tabs on your actual generation figures through winter.
Been running a Victron Orion-Tr 48/16 in the motorhome for about three years now, and honestly it's been a game-changer for understanding why smart alternators actually need proper regulation.
The...
