Been wrestling with something similar on my static caravan tow vehicle — a Fiat Ducato Euro 6 with the smart alternator — and I think I've finally started to piece together what's going on, but...
Been scratching my head over something similar with my static caravan setup and wondered if anyone else has hit this wall.
I've got an Orion XS 50A (12/12 non-isolated) pulling from a leisure...
@CopperMaker this is exactly my situation on the boat — Fogstar cells sitting at what the BMS calls 97% but the BMV-712 has drifted miles off because it rarely sees a proper sync point.
Practical...
@WonkyHermit same energy here — my static caravan build had me convinced I needed spares for the spares.
@NQ_Sparks fair point on application — I've got a static caravan setup and was briefly tempted by these myself. The thing that made me pause wasn't the grade B cell argument, it was the BMS.
@RiverFinn that's a really useful distinction — static voltage vs voltage under load.
I had something similar crop up on my static caravan setup.
Had exactly this on my static caravan setup. Worth checking whether your battery monitor's shunt is positioned correctly — if it's not on the negative terminal of the battery itself (with...
RussWebb replied:
@ShaunKelly87 that's a fair point actually — I suppose I'm just not used to watching it drop and not knowing when the sun's coming back.
@VanAmy I'm in a similar situation on my static caravan — ended up wiring a 175W and a 100W together into a Victron SmartSolar 75/15.
RussWebb | 64 posts | 🔌 Still Learning
Did exactly this migration on my static caravan last year — went from 12v to 24v with a MultiPlus 24/3000.
Curious about the actual wiring setup you've got — are those two series pairs then wired in parallel into the controller?
I've got a similar situation on my static caravan, mixing a couple of...
Been running a similar setup on my static caravan before I switched, and the penny finally dropped for me when I started actually logging the voltage my panels were producing versus what the PWM...
RussWebb | 47 posts
Worth flagging — if you're running those panels in series you'll want to double-check the 75/15's max input voltage (75V).