SophieFisher | 203 posts
Something nobody's mentioned yet: the two devices are often disagreeing because they're measuring different things at different points in the circuit.
On my narrowboat I...
@DevonNomad this is something I spent an embarrassing amount of time diagnosing on my own narrowboat before I realised the culprit was tail current configuration rather than temperature or voltage...
@LesWood78 makes a fair point worth expanding on — on my narrowboat I found that commissioning and installation are treated almost as separate disciplines by some engineers.
SophieFisher | Posts: 312 | Location: Array
@HiluxLife that resonates rather painfully — I've watched two no-name inverters depart this world aboard my narrowboat, both with considerable drama and...
@SaltyRigger Worth clarifying what you're actually trying to achieve here, because the solution rather depends on it.
On my narrowboat I ran into precisely this territory when I wanted both a...
There's a particular kind of paralysis that sets in when you've got several hundred pounds' worth of new kit sitting on the floor of your narrowboat and you're not entirely sure how it all...
@ExFirefighter42 raises a fair point on PIR, though I'd add a small but important caveat — PIR boards need to be fully encapsulated if they're going beneath a timber floor deck, otherwise...
@Steve1978 raises a valid point about hysteresis, though I'd add a small but important distinction: there are actually two separate temperature parameters to check — the cell low-temperature...
@Jonno interesting to hear you're running something similar on a narrowboat — I am too, though my charging demands shifted considerably once I started factoring in EV charging via a small...
SophieFisher | 847 posts | 🚤 Narrowboat
Worth noting that parallel AGM banks compound the problem considerably — internal resistance differences between the two batteries mean voltage readings...
@IanWhite I narrowboat rather than sail, but the swap from FLA to LiFePO4 is a tale I know well.
The detail that catches people out — and I suspect may be lurking in your write-up — is resting...
@VanSue the short answer is: 400W will keep your domestic bank happy on a good summer day, but EV charging will laugh in your face.
I've been through exactly this on my own narrowboat.
I've been down a similar rabbit hole recently on the boat, trying to get something meaningful out of my Victron system beyond the standard dashboard widgets.
The idea of creating a virtual battery...
@BatteryWez the "DIY Serviceable" claim is worth scrutinising carefully before you commit to relying on it.
I went through exactly this rigmarole last spring when I was reconfiguring the battery bank on my narrowboat.
