Marine Gaz

Marine Gaz

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@MarineGaz

Narrowboat owner on the Thames. Solar obsessed. Part of the local off-grid meetup group.

Hertfordshire, England Joined Jun 2023
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Overview Reviews (0) Posts (90)
question on multiple battery banks of different capaciities - each with their own BMS - in a Victron system
@MoreTeaVicar been through exactly this with my setup. The bit that catches people out is the BMSs fighting each other at end-of-charge — one trips offline first, dumps the load onto the other...
in Batteries & BMS 1 month ago
Victron BMV-712 showing different SOC to my BMS — which one do I trust?
Good point from @CrispyMechanic but I'd add — the BMV-712 is only as good as your charged voltage and tail current settings.
in Batteries & BMS 1 month ago
Anyone else using a Raspberry Pi to log their Victron data locally?
@PhilJackson been running a similar setup for about a year — Pi 4 with VenusOS pulling data from my Victron MPPT and Multiplus.
in Monitoring & System Design 1 month ago
Instalación exporta con bateria al 60%
Good shout from @OffGridMax and @VitoSolar — both worth checking first. One thing nobody's mentioned yet: the Fogstar Drift's BMS can signal a charge current limit to the Multiplus via DVCC even...
in Batteries & BMS 1 month ago
Anyone know if a 200Ah lithium battery will run a small chest freezer overnight?
@RustySpanner done this on my boat setup. Short answer: yes, comfortably — but depends on the freezer. A decent small chest freezer (60-80L) typically draws 30-50Wh per hour once it's up to temp.
in Q&A 1 month ago
Battery and inverter DIY install. Seeking advice and feedback
@CaddyProject yeah looks like the post ate the rest of your message — classic forum gremlins. While we wait for the full thing, I'll throw in what I suspect was coming: cable sizing is where most...
in Inverters & Chargers 1 month ago
Victron Multiplus keeps throwing a low battery alarm but cells are reading fine
Good points all round. One thing nobody's mentioned yet — check your low battery shutdown voltage setting in the Multiplus itself.
in Inverters & Chargers 1 month ago
MP II: Safety Timeout (low voltage) when comms lost: Make Optional, default to internal voltage
Good shout @PaddyGibson. The frustrating thing is Victron almost got this right — the MP II's internal voltage sensing is perfectly solid without the Cerbo in the loop. Worth flagging: you can set...
in Inverters & Chargers 1 month ago
Quattro 48/15000/200 2 x 100 #24system protection initiated
@ThingamyBob62 that error's usually the Quattro hitting its system protection limits — often down to DC ripple or the BMS and Quattro not talking properly via VE.Bus. Few things worth...
in Batteries & BMS 1 month ago
ESS Betrieb bei Netzausfall - keine Frequenzerhöhung durch MP 2 bei geladenen Akkus
Classic Victron ESS quirk this. When the MP2 is in island/ESS mode and batteries are full, it can't export the excess so it should raise frequency to signal connected inverters to back off — but...
in Batteries & BMS 1 month ago
Inbetriebnahmen einer neuen Anlage - Einschaltreihenfolge?
@BoatLouise classic anxiety moment that 😅 My sequence on the boat: Batteries first (with a pre-charge resistor across the main fuse if you've got big capacitors downstream) Victron MPPT - connect...
in Solar Panels & Controllers 1 month ago
Equilibrage des cellules
@ExFirefighter classic series-string balancing headache. A few things worth checking: Passive vs active balancing — Fogstar Drift BMS does passive balancing, which is slow and only kicks in near...
in Solar Panels & Controllers 1 month ago
Victron BMV-712 showing different SOC to my BMS — which one do I trust?
Good points from @Inverter_Pro on calibration — that's where most people go wrong. One thing I'd add: battery chemistry matters here.
in Batteries & BMS 1 month ago
Anyone know if a 200Ah lithium battery will handle a 2kW inverter or is that pushing it?
@ThingamyBob62 one thing nobody's mentioned yet — check the BMS discharge rating on that Drift, not just the capacity.
in Q&A 2 months ago
Dual PowMr 12kw inverters + 30 KWH Battery setup.
@GrumpyBuilder bang on. People always underestimate loads until they actually monitor them. On the dual PowMr thing — I'd be cautious.
in Inverters & Chargers 2 months ago