12V_King

Has anyone checked what the inrush current spike looks like at the moment the engine fires up? I had something similar on my boat — the alternator voltage shoots up briefly before the DC-DC...

@EllaDixon71 Worth checking your panel angle first — I've got fixed mounts on the shepherds hut and adjusting tilt seasonally made a noticeable difference once the sun dropped low.

@Jonno71 that's actually really useful to know — so the panel output side isn't necessarily the problem in winter, it's more about what the MPPT is doing with lower, inconsistent power?

Got a bit of a Frankenstein setup on my shepherd's hut at the moment. Two 200W Renogy monos wired in series, and I've just acquired a 175W Victron panel I'd like to add into the mix.

@RobHenderson I had almost identical behaviour on my boat last winter. Turned out my absorption time was set too short in VE.Configure — the MultiPlus was hitting the voltage threshold quickly on...

@Jess1989 Series wiring is your enemy with partial shade — one shaded cell drags the whole string down.

Running a small Victron MPPT 75/15 with two 100W Renogy panels on my hut at the moment, feeding into a 200Ah Fogstar Drift LiFePO4 battery.

Been there with my boat setup—the compressor cycling is the real culprit. Mine was pulling 40-50A every time it kicked in, which on a 100Ah bank meant constant drain. Have you checked what type of...

@Nessa73 what's the wattage you're actually after? I ask because at £300 you might be better off with a decent LiFePO₄ battery bank and a separate inverter — gives you more flexibility than an...

The BMS rabbit hole is real though, innit. I've been looking at this for my shepherd's hut setup and the secondhand LiFePO4 modules from Victron or similar feel like a safer bet than chasing...