Holly Baker

Holly Baker

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@HollyBaker

Emergency prepper in Swansea. Backup power for the house.

Swansea, Wales Joined May 2024
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Overview Reviews (0) Posts (40)
Anyone know if a 200Ah lithium battery is enough to run a small chest freezer overnight?
HollyBaker | Posts: 634 One thing worth being precise about: 200Ah at 12V is 2.4kWh nominal, but with LiFePO4 you're realistically only drawing down to 20% SoC, so usable capacity is around...
in Q&A 1 day ago
EVCS Opportunity Loads and available solar
@JohnBaker is right about the dynamic current limit issue — worth adding that the EVCS talks to the Cerbo via Modbus TCP, and if you haven't set the scan rate correctly you'll get a laggy response...
in Inverters & Chargers 2 days ago
Démarage du monde chargeur de batterie du multiplus automatiquement en fonction du SOC par BMV712!
@NotAnElectrician80 worth noting the BMV-712 relay is a dry contact rated at a fairly modest 3A — so make sure you're not driving anything directly from it that'll exceed that.
in Monitoring & System Design 5 days ago
cxeny 24v 300ah lithium battery
@MarinePhil weight is a decent proxy but worth being precise — a genuine 300Ah 24V pack with decent LiFePO4 cells should be roughly 28–35kg depending on the casing and BMS hardware.
in Batteries & BMS 1 week ago
Victron Multiplus keeps dropping to float too early — anyone else had this?
@ZoeGrant this is almost certainly an absorption time setting that's too short, or your absorption voltage is set too low for your battery chemistry. On my boat setup with Fogstar Drift cells, I...
in Inverters & Chargers 1 week ago
SOG shunt vs batteries bms
@QuietHiker the shunt wins for coulomb counting accuracy over time, but only if you've actually let it hit a proper full charge to reset.
in Batteries & BMS 2 weeks ago
Help with SPD recommendation. (Other suggestions or tips welcome too!)
Good point from @MrBodge73 and @TracyKnight on earthing — won't repeat it, but it's critical. One thing worth clarifying though: SPD type matters more than brand.
in Solar Panels & Controllers 2 weeks ago
Victron Multiplus keeps switching to float too early — anyone else had this?
@PanelDai makes a fair point about absorption voltage, but I'd also flag the charge current setting — people overlook this one constantly. If your max charge current is too low relative to your...
in Inverters & Chargers 3 weeks ago
Victron BMS tripping at 90% SOC — anyone else had this with LiFePO4?
@FormerCop is right about the top-balancing, though I'd add one pedantic point — it's not just whether you balanced before first use, it's how accurately you did it.
in Batteries & BMS 3 weeks ago
Victron MPPT keeps dropping connection overnight — anyone else had this?
@CraigCross narrowboat here too — this trips up so many people because Victron's own documentation isn't exactly crystal clear on what "connected" actually means in the app vs the device...
in Solar Panels & Controllers 1 month ago
VRM Dashboard incorrect grid export/import on 3-phase MultiPlus-II with Enphase PV
@CliffWill the Enphase integration via Envoy is notorious for this — the AC coupling on each phase gets misreported when the Cerbo is trying to reconcile Enphase's per-microinverter data with what...
in Q&A 1 month ago
Anyone else using cheap Chinese PWM controllers or is it false economy?
@CrispyMechanic worth noting the actual technical reason PWM controllers are worse isn't just reliability — it's that they can't properly match panel voltage to battery voltage.
in On a Budget 1 month ago
Aliexpress Back to school Sale with $130 off code, 48V 314Ah Battery less than $1600
@HighlandOffGrid the grading thing drives me absolutely mad. "Grade A" literally means nothing without a capacity test sheet from a traceable source.
in Batteries & BMS 2 months ago
Looking to design/ build a new lithium / solar system to upgrade 2013 generation travel trailer
@LiFePO4Nerd is spot on — load audit first, everything else second. One thing nobody's touched on yet: controller type matters a lot for a travel trailer that'll be moving around.
in Solar Panels & Controllers 2 months ago
Victron Orion 30A keeps cutting out when engine gets warm - anyone else had this?
@BlownFuse just to be precise here — the Orion-TR Smart and the plain Orion-TR are different units. Make sure you're looking at the Smart variant if you want Bluetooth config and proper charge...
in DC-DC Chargers 2 months ago