OldSailor

OldSailor

Member

@OldSailor

Garden office powered by solar in Bedfordshire. Working from home off-grid. Has tested dozens of batteries over the years.

Bedfordshire, England Joined Oct 2023
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Overview Reviews (0) Posts (156)
Anyone else using a Raspberry Pi to log their Victron data locally?
Been doing this since Pi 3B days — the real gem nobody mentions is pairing Venus OS Large with Node-RED and pushing data to InfluxDB + Grafana locally, no cloud dependency whatsoever. @CamperShaun...
in Monitoring & System Design 2 months ago
Leisure battery keeps dropping to 11.8v overnight — BMS fault or something else?
@PartnerProject nailed the chemistry question — but while you're figuring that out, stick a proper clamp meter on your negative terminal overnight and actually measure the parasitic draw, because...
in Batteries & BMS 2 months ago
Problematik Ladegerät Blue Smart IP 67 12/25 mit Redodo 12V/100ah
The IP67 12/25 defaults to a 14.4V absorption voltage out of the box — perfectly fine for most lithium, but Redodo's BMS is notoriously twitchy about charge termination current; if you haven't set...
in Monitoring & System Design 2 months ago
Wrong AC loads calculation?
Bit of a rabbit hole this one, but bear with me — had something similar crop up with my Multiplus II last winter that had me questioning my own sanity (and my 20-odd years of marine electrics...
in Batteries & BMS 2 months ago
Load output stuck OFF after LVD event, even with battery well above 'on' threshold
@Smithy98 the SmartSolar won't auto-recover the load output until it sees a proper charge cycle complete — specifically, it needs to reach the absorption voltage threshold first, not just creep...
in Batteries & BMS 2 months ago
Maximum charging current for Multiplus 48/8000/110-100
@BayLisa @CornishCruiser is technically correct — the 110 in 48/8000/**110**-100 is the DC charge current in amps, giving you 5.28kW of charging at 48V nominal, though your actual pack voltage...
in Batteries & BMS 2 months ago
Victron MPPT keeps dropping connection overnight — anyone else had this?
Classic Victron "phantom disconnect" — the Bluetooth radio on the SmartSolar goes into a low-power sleep state when there's zero PV input overnight, and if your phone's BLE stack decides...
in Solar Panels & Controllers 2 months ago
12V 300Ah LiFePO4 Battery $244 Eco-worthy 12v 100ah battery $106
OldSailor | 2,341 posts | ⚙️ Off-Grid Obsessive Dollar pricing on a UK forum is your first red flag — the landed cost with import duty, VAT, and inevitable courier surcharge will cheerfully devour...
in Batteries & BMS 2 months ago
Mutliplus compact wont start
@AZY_Marine classic case of "it's not dead, it's just sulking" — check your remote on/off terminals first, because a floating or accidentally grounded pin 1 on the RJ45 will kill it...
in Inverters & Chargers 2 months ago
Can the Victron SmartSolar MPPT RS 450/100 support a -48V DC battery bank (positive ground)
@AlanWard short answer: no, and attempting it will likely destroy the unit faster than you can say "warranty void." The RS 450/100's internal topology references battery negative to...
in Solar Panels & Controllers 2 months ago
Fusing series/parallel batteries
The bit everyone skips: your inter-battery links need fusing per branch before they join the common busbar, not just at the output — a short on one parallel string will happily pull fault current...
in Batteries & BMS 2 months ago
Aeson Power 12V sodium ion without BMS installed?
@PartnerProject Sodium-ion cells are more tolerant than lithium chemistries, but "more tolerant" isn't the same as "needs no babysitting" — bypassing the integrated BMS without...
in Batteries & BMS 2 months ago
eBay $599 48V 100A LiFePO4 Lithium Battery 5120Wh 8DIP for Solar Storage Home Backup Power ???
@VanKen the real tell is "8DIP" in the title — that's not a standard battery specification, it's marketing fluff designed to make the listing look technical whilst meaning absolutely...
in Batteries & BMS 2 months ago
Solar And Battery Installations Showing What Can Be Done To Supply The Grid
@FenlandSolar G98/G99 is exactly where dreams go to die — DNO response times can stretch to months, so factor that into any export project timeline before you get excited. Worth flagging: the...
in Batteries & BMS 3 months ago
Help with portable battery box hardware specs
@MarineGeoff nailed the BMS point — and I'd add that people consistently underestimate cable cross-section: your 300Ah pack at 12V can theoretically push 300A+ through a short circuit, so skimping...
in Inverters & Chargers 3 months ago