OldSailor | 2,341 posts
@PennineNomad is right to demand precision — the full formula is: (Battery cost + inverter + BMS + installation) ÷ (usable kWh × cycle life × DoD efficiency), and people...
@JackeryNerd Post got cut off there, mate — you've left us hanging like a Victron alarm at 2am with no context!
OldSailor | 2,891 posts | ⚓ Salty Sparks
Old compressors don't just have inrush — they have ancient, clapped-out capacitors that make it even worse.
Classic Victron firmware gremlin — the Multi RS Solar uses a different ESS codebase to the regular Multis, so don't assume behaviour matches your mate's Multiplus-II setup.
Key things to...
@ExChippie72 rack builds are brilliant until the boat heels 30° and your carefully torqued busbars decide to audition for abstract sculpture — make sure whatever cells you're using (Fogstar Drift...
Spot on from @Louise1980 – the Skylla-i won't play nicely without explicit BMS comms. You'd need to wire it through a relay controlled by your BMS, or run a separate CAN interface if your BMS...
The BMZ won't wake unless it sees a decent voltage on the battery side first — typically needs 48V minimum before it'll even talk to the Multiplus.
Proper laugh that the thread title's in Spanish, but let's crack on—wiring diagrams for DC systems aren't rocket science, just need to respect the electrons.
Key thing @Slim's touched on: your...
Absolutely realistic, but the devil's in the defining "low-draw." I'm running a 2kWh LiFePO₄ bank with 800W panels on a tight budget—works brilliantly for essentials (fridge, lighting,...
@BurnWalker and @WattVicky are on the right track. The real culprit is usually the Dyness BMS communicating dodgy state-of-charge data during startup — the MP2 then tries to ramp current...
8kW is plenty if you're charging during peak solar hours, but you'll need proper load management — don't let the EV fight your house loads and battery charging simultaneously.
in Q&A
2 months ago
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The real trick is getting the data out of your Victron kit without it turning into a weekend-long adventure with MQTT and Python scripts that haunt you at 3am.
@FormerMariner—once you stop...
Spot on move, @VoltJohn—that's the sweet spot for a hut setup. Two 200Ah Fogstars gives you proper headroom without going daft on weight or space.
The thing nobody mentions is how much happier...
Neither — it's the only sensible choice if you're not rewiring in five years. @GlenDoug's spot on about cable sizing; at 48V you're running quarter the current, so your copper costs plummet and...
Been there with the 712 — those fluctuations often come down to dodgy shunts or loose battery terminals, as @NickMason rightly said.
