What's New

Latest posts across all forums

Latest Threads Unanswered
Has anyone actually checked whether it's the thermal cutout specifically or just the unit detecting a voltage drop on the alternator side and shutting down to protect itself?
Bay Tim in DC-DC Chargers 2 weeks ago
@GlenWard three 15k Quattros AC coupled is basically where your spreadsheet grows its own spreadsheet — done a modest AC coupled setup in the garden office and even at that scale the frequency...
@VanKen 😂 been there — woke up to a BMS low voltage alarm at 2am because I'd manually overridden the Shelly and forgot about it.
ShortCircuit in Batteries & BMS 2 weeks ago
Seen this exact thing on a standard 230V MultiPlus II setup actually. AC Out 2 relay cycling is almost always the assistant logic fighting itself — usually when you've got the Generator or Grid...
ZFS_OffGrid in Batteries & BMS 2 weeks ago
Interesting one — does this affect the Shelly Plus 1PM as well, or just the original Shelly 1PM? I've got a couple of the Plus variants monitoring loads in my static caravan setup and I've not...
Tel Hall in Batteries & BMS 2 weeks ago
@GoldenMechanic is right about duty cycle being the real number to chase, but also worth factoring in ambient temp — freezer works harder in a hot motorhome than sitting in a cool garage. I run a...
ZFS_OffGrid in Q&A 2 weeks ago
My garden office runs a fraction of these numbers but the arbitration headaches scale surprisingly linearly — had my Fogstar battery bank arguing with a Renogy MPPT and a small inverter-generator...
MarineGeoff | 1,203 posts | ⭐ Trusted Member Got a shepherd's hut myself — 200Ah lithium is basically the Goldilocks zone, not overkill at all once you factor in the 80% usable capacity rule and a...
Marine Geoff in Q&A 2 weeks ago
Hey @BoxerDream! To add to what @ZFS_OffGrid is saying about the freezer choice — ambient temperature is a massive factor people overlook.
Kate in Q&A 2 weeks ago
Yeah this bit me hard with my shepherd's hut build. The shore current limit thing is basically the Multiplus trying to protect whatever supply you're feeding it from — if the ET112 isn't seeing...
Lefty in Inverters & Chargers 2 weeks ago
@SaltySocket the classic "which gauge do I trust" problem — it's basically the off-grid version of arguing with your satnav while also arguing with your mate in the passenger seat...
@ExpertConvert yes, thermal cutout was exactly my issue too on the boat — though I'd add that mounting orientation is often the overlooked culprit alongside airflow. Victron's own documentation...
Panel Ewan in DC-DC Chargers 2 weeks ago
@BerlingoLife the Orion-Tr Smart 12/12-18 (you'll see it listed as 17A in some firmware versions, same unit) has a known quirk where it'll throttle output current when the alternator voltage...
Rusty Roamer in Batteries & BMS 2 weeks ago
Hey @YorkshireCamper, the 2x120V unit does throw a few curveballs when it comes to assistants - worth mentioning which firmware you're running on the Multiplus II as there were some known relay...
Solar Tom in Batteries & BMS 2 weeks ago
@BoxerDream @WattAMess25 both make fair points but the engine hours thing is the real killer — on the K&A in winter you'll be moored up for days at a stretch.
ThingamyBob62 in Marine & Boat 2 weeks ago
Had this exact issue last summer on a run down to Cornwall 🙌 Check your alternator wire gauge too — a long run of undersized cable will cause voltage drop that trips the Orion even if the mounting...
Van Anne in DC-DC Chargers 2 weeks ago
@BoxerDream depends massively on the freezer. A halfway decent chest freezer (Alpicool, Brass Monkey etc) might only pull 30-45Ah overnight once it's at temp — totally doable on a 200Ah...
ZFS_OffGrid in Q&A 2 weeks ago
@ExFirefighter11 This is the fundamental problem with grid-tied shepherd's hut setups — you're essentially paying for insurance you barely use. Worth doing the maths properly: UK standing charges...
Watt Ed in General Chat 2 weeks ago
@TrevorRoberts75 not a motorhome setup but had similar grief keeping a Dometic cool in my cabin during last summer's heat.
@Gazza this is almost certainly a voltage spike fooling the controller into thinking absorption is complete.