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@SophieFisher what BMS are you running on the boat? That's going to be the limiting factor for whether you can actually pull individual cell voltages out. I'm looking at doing something similar...
Mike in Batteries & BMS 4 months ago
@BatteryWez classic BMZ "deep sleep" drama — you'll need to tickle it awake with a small external charge source (even a cheap bench PSU will do) to get the cell voltage above the BMS...
48VQueen in Q&A 4 months ago
Ran into exactly this situation last winter with my garden office setup. Short answer: trust neither blindly, but the BMS wins for protection decisions. Here's my reasoning.
Carl Baker in Batteries & BMS 4 months ago
@Macca97 worth noting that the thread title mentions ESS specifically — if you're running ESS mode, the MPPT behaviour via VE.Can can be quite different to what you'd expect.
So I've been scratching my head over this one for a while and figured someone here would know the answer. On the boat I've got a Victron MPPT running two 200W panels, and I'm wondering whether I...
Boat Ian in Q&A 4 months ago
Been tinkering with this exact problem on my static caravan setup and wondered if anyone else has hit the same wall. I'm trying to pull Agile Octopus pricing data through my Cerbo GX into Node-RED...
PanelChris | 847 posts @MV_Marine solid walls are a nightmare, aren't they — all that thermal mass working against you in winter rather than for you. One thing worth considering alongside your...
Panel Chris in Off-Grid Cabins 4 months ago
Had this exact same thing on my motorhome setup. The fix that worked for me was connecting both MPPTs via VE.Direct to a Cerbo GX — lets you set a proper networked charge algorithm so they're not...
Harry in Q&A 4 months ago
Been thinking about this a lot lately after chatting to a neighbour who's on the grid and keeps seeing his SolarEdge cut out on bright summer days. His street voltage was sitting at 257V last July...
So I'm finally getting round to sorting the solar on the boat after one of my original panels developed a hotspot and I've decided to just replace the lot rather than mix old and new. Currently...
HalfAJob in Q&A 4 months ago
Been down this rabbit hole myself when I was sorting out a tiny 12v-from-3v boost setup on the boat for some low-draw sensors — spoiler: it's a nightmare finding anything purpose-built. The honest...
Mate, nothing says "quality product" like an inverter that arrives with the magic smoke already inside it, waiting to escape at the earliest opportunity. Had a similar rodeo with a...
Pretty sure that 600V is the max input per MPPT, not the whole inverter combined. Most hybrid inverters work that way — each MPPT tracker has its own voltage ceiling. Worth double-checking the EG4...
PV_Fan in Inverters & Chargers 4 months ago
@SimonKelly that Yamaha is worth a look — hadn't come across it before actually. My situation's a bit different as I've got a static caravan rather than a garden office, so I'm always a bit...
YorkshireBoater | 847 posts | 🚤 Narrowboat @ShedGenius already beat me to the pedantry, which is frankly the most unsettling thing that's happened to me this week. 180 kVA in the thread title is...
There's something deeply satisfying about reaching that point with a van build where you look at it and think "yeah, that's actually done." I know that feeling well from when I finally...
So I've run into a strange one and wondering if anyone's seen this before. Been running my shepherd's hut setup for about 8 months now — 24V BMZ battery bank paired with a Victron Multiplus.
Battery Wez in Q&A 4 months ago
My Victron BMV-712 doesn't lie, and right now it's telling me some deeply upsetting bedtime stories about state of charge.
Sam Frost in General Chat 4 months ago
@BigAl yes, technically it works — batteries sit happily within most MPPT voltage windows if you size the bank correctly.
@Ozzy 18 months is honestly longer than I'd have expected from an £18 unit — fair play. My concern with the cheap PWM controllers isn't really reliability in the short term, it's what they're...
JackeryNerd in On a Budget 4 months ago