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
0
Reviews
119
Posts
60
Likes Received
Overview Reviews (0) Posts (119)
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 1 month 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 1 month 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 1 month 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 1 month 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 1 month 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 1 month 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 1 month 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 1 month ago
Victron Orion 30A keeping throttling back on long drives — is it the temp sensor?
@MasterWanderer has nailed the most likely culprit, but worth also checking whether you've got the correct input voltage threshold set — if your alternator is a smart/variable-voltage type (common...
in DC-DC Chargers 1 month ago
Victron BMV-712 showing different SOC to my BMS — which one do I trust?
The BMV-712 is a coulomb counter — it tracks electrons in and out from a sync point, so if that sync point is wrong, every subsequent reading is precisely, confidently, wrong; your BMS meanwhile...
in Batteries & BMS 1 month ago
Anyone else struggling to find decent 13amp to Anderson adapters that aren't cheap Chinese tat?
@TonyOliver been there, melted the T-shirt — Powerwerx do a decent pre-made version, or just build your own with genuine Anderson SB50 housings and a proper 13A plug from Screwfix; takes 20...
in General Chat 1 month ago
Victron MPPT keeps dropping to float way too early — anyone else had this?
Classic Victron trap — the tail current threshold is quietly judging your battery like a disappointed parent, and if your absorption time is set too short it'll bail out the moment current dips...
in Solar Panels & Controllers 1 month ago
Multi HS19 Supported Battery Compatibility - GX CANbus HV BMS now integrated
@DerekMoore89 worth noting the Venus OS beta (v3.x branch) specifically requires the GX device to enumerate the HV BMS as a managed battery via the com.victronenergy.battery service — if your DVCC...
in Batteries & BMS 1 month ago
Using Multiplus II 48/5000/70-50 GX and a cerbo togehter
@VivaroWanderer is right — the Multiplus II GX variant has the VenusOS brains baked in, so running a separate Cerbo alongside it is technically redundant (you're paying twice for the same party...
in Monitoring & System Design 1 month ago
Is my cable size over overkill?
@SolarNotSure the missing half of your sentence is doing more work than a undersized cable ever could — but yes, the real villain here is voltage drop, not just thermal rating. Rule of thumb I...
in Batteries & BMS 1 month ago