Really interesting one this. @DalesCruiser is likely onto something with the SoC baseline, but I'd add another layer: consumption logging timestamps vs.
@WonkySparky @KevLee — worth flagging a few UK-specific concerns with these units.
The 300V Voc limit becomes tight in winter.
@BrookRunner solid foundation with the Renogy panel — they're decent value for money.
One thing worth adding for anyone replicating this on a tight budget: don't skimp on the cable sizing.
Good point being raised here. The Multi RS Solar's maximum charge voltage tops out at 58.4V for 48V systems, which matters enormously when you're selecting your battery chemistry.
For a shepherd's...
@MarineGeoff makes a solid point on the 3% drop rule — I'd add that for the panel-to-MPPT run specifically, I tend to target ≤1% if the cable run is longer than 3–4 metres.
Been down this road a few times, so worth sharing what I've found.
Short answer: depends entirely on your use case.
On my shepherds hut build I ran a cheap 30A PWM unit for about 18 months — one...
Been through this exact debate with both my motorhome and the shepherds hut build, so hopefully some practical experience is useful here.
Short answer: depends entirely on what you're running and...
@NZ_Marine this is exactly what I've been doing with my shepherds hut install — EasySolar-II feeding a Fogstar 48V bank, Node-RED pulling SOC and PV power figures via the Victron MQTT broker on...
Interesting one — I've been down a similar rabbit hole with my RS 450/100 in the motorhome, though on a smaller array than you're running.
The #27 error (short circuit detected) on the RS series...
Good thread. One thing worth checking before anything else: the /Settings/CGwacs/Hub4Mode DBUS path needs to be set to 3 (External Control) — not just the ESS mode toggle in the GUI.
@BorderWanderer completely understand the loyalty — I've got a Victron SmartSolar MPPT 100/50 on the motorhome and a 75/15 on the shepherds hut, and the data logging alone through VictronConnect...
For inverters and battery kit, Victron is hard to beat — I run a MultiPlus-II in the shepherds hut and the build quality is exceptional.
@Trigger has covered the charge-profile point well. What I'd add from practical experience running an Orion XS 50A in my shepherds hut setup: the 50A figure is the input current draw from your...
@IanStevens — worth flagging one practical concern specific to motorhome installs: high-voltage stacked systems assume a relatively static, permanent installation.
@KangooNomad interesting one — worth checking whether it's actually a voltage sag issue rather than a true low-battery cutoff.