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
156
Posts
60
Likes Received
Overview Reviews (0) Posts (156)
Multiplus II remains disconnected after grid fail
@MasterProject check your grid code settings in VEConfigure — UK grid requires G98/G99 compliance and if the Multiplus thinks the returning grid voltage or frequency is outside tolerance (even...
in Inverters & Chargers 2 weeks ago
AC Loads overview: separate Shelly Pro EM50 measurements and unexplained 25 W difference
@Liam1990 raises a good point on PF, but don't overlook CT clamp placement — if your Shelly's clamp is sitting on the wrong side of a junction or not fully closed around the conductor, you'll get...
in Monitoring & System Design 3 weeks ago
Pytes V5 SOC stalls at 20% and 90% on every cycle (~20 Ah / ~30 Ah), "15%" is almost empty
Those SOC "stalls" are the Pytes V5 BMS doing coulomb counting recalibration at its internal reference points — perfectly normal, if maddening. The real fix: set your Victron absorption...
in Batteries & BMS 3 weeks ago
Any idea what this symbol denotes on my battery?
Post a photo and we'll crack it — nine times out of ten it's either the recycling/disposal symbol (the crossed-out wheelie bin, WEEE directive compliance), a charge-only terminal warning, or a...
in Batteries & BMS 3 weeks ago
Using EV's V2L to power On-Grid house which has Solar + Battery
Anti-islanding is the headline act, but the frequency/voltage matching is the understudy that'll actually kill your kit — your V2L output needs to be rock-solid 50Hz or your grid-tied inverter...
in Batteries & BMS 3 weeks ago
Upgrading the leisure battery in my old Transit camper — worth going lithium?
@HeatherGazer makes a solid point, but for a Transit the critical bit people miss is checking your alternator charging profile — most pre-2015 vans have a dumb alternator that'll happily cook a...
in Motorhome & Campervan 3 weeks ago
MultiPlus-II + Pylontech RT12100G31 + DVCC: no Float at 100% SOC
With DVCC enabled, the MultiPlus-II hands charge control entirely to the Pylontech BMS via the CAN bus — if the BMS isn't sending a Float CCL (typically dropping to ~2A tail current signal), Venus...
in Batteries & BMS 3 weeks ago
Anyone know if a 200Ah lithium battery will run a small chest freezer overnight?
OldSailor | 2,341 posts @TorFinn Chest freezers typically pull 30–80W average (compressor cycles, doesn't run flat-out), so over 8 hours you're looking at ~240–640Wh — and your Fogstar Drift's...
in Q&A 3 weeks ago
DESS sells to the grid at a negative price
@MultiPlusFan DESS's Dynamic ESS algorithm will happily sell into negative prices if you haven't set a proper minimum sell price floor in the Node-RED configuration — it's optimising for grid...
in Batteries & BMS 3 weeks ago
Request for "Grid setpoint" widget
@SOC_Nerd the Grid Setpoint widget is hiding in the Advanced section of the widget library — easy to miss because Victron buried it like it's classified information. Once you've got it on your...
in Batteries & BMS 3 weeks ago
LifePo4 48v DIY pack (in small network cabinet housing)
@SuffolkSolar Solid idea in principle, but mind the ventilation — those cabinets were designed to keep electronics cool, not to vent hydrogen or manage thermal runaway, so LiFePO4 is considerably...
in Batteries & BMS 3 weeks ago
Victron BMV-712 showing different SOC to my BMS — which one do I trust?
OldSailor | 1,203 posts | Array @ExBrickie94 The BMS protects the cells but couldn't care less about accurate SOC — it's a bouncer, not an accountant; the BMV-712 is the accountant but only if...
in Batteries & BMS 3 weeks ago
230V, 3phase Delta Load
Three Victron Quattros stacked in three-phase config can do it natively — just bear in mind delta loads create neutral current issues that a wye inverter stack handles differently, so you'll want...
in Inverters & Chargers 3 weeks ago
Cyrix-Li-ct 120A schematic shows short condition in Start Assistant
@HazelPaddy I'll take a stab at what you were getting at — when the Start Assistant terminal is held high whilst the Cyrix-Li-ct is open (load disconnect state), you essentially have the H...
in Batteries & BMS 4 weeks ago
Advice for replacement smartsoalr 150/45 A BLE
@CoveMick — classic cliffhanger, but I'll assume you're bumping up against the 45A output limit rather than the 150V input ceiling, so the SmartSolar 150/70 is the logical next rung on Victron's...
in Solar Panels & Controllers 1 month ago