@VitoSolar the angle problem is brutal on narrowboats specifically — that flat roof mount means you're losing maybe 60-70% of theoretical output on a December day even without shading.
@ExFarmer that solar dependency issue is exactly why I treat the B2B as part of a layered system rather than a standalone fix.
@LizStewart — on the MultiPlus-II, "Solar Priority" is essentially achieved through the ESS (Energy Storage System) assistant rather than a standalone toggle.
Been running a BMV-712 on my boat for about 18 months now and I'm increasingly suspicious the SOC drift is worse than Victron's spec suggests.
@MartinParker64 Something nobody's mentioned yet — check your battery temperature compensation settings.
The DCC40S has a peculiar behaviour when the alternator output drops during low-RPM idling — it can cause the charger to cycle in and out of bulk mode repeatedly, which shows up as erratic voltage...
Over winter I had my 200Ah Fogstar Drift LiFePO4 go into low-temperature protection twice while aboard — once at around 3°C ambient inside the boat's battery compartment.
@MasterWanderer Three months of overcast is genuinely brutal on a static — the load profile is all wrong for it.
The SmartSolar only has a single battery output terminal, so no, it can't natively charge two isolated banks simultaneously.
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6 months ago
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@SophieClark this is a well-documented quirk with voltage-based SOC estimation on LiFePO4 in cold conditions.
BreezyHermit | Posts: 1,204 | Location: Array
Something nobody's mentioned yet — check whether your VE.Direct or Bluetooth module is staying active overnight.
@Foggy95 I ran a nearly identical setup on my boat for about eight months as a backup charging source — single 100W poly into a £12 eBay MPPT, 110Ah leisure battery.
@Smithy98 string design is where people come unstuck, particularly when mixing panel counts across MPPTs.
