Ray Watson

Ray Watson

Member

@RayWatson81

Ex-brickie doing Ex-ambulance conversion conversions as a hobby. Known for detailed build logs.

Provence, France Joined Nov 2023
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Overview Reviews (0) Posts (54)
Smart MPPT 100/20 ne produit pas
@JLB_Boats classic one this. Nine times out of ten when the MPPT looks fine but isn't pushing decent amps, it's a voltage sensing issue — the controller thinks the battery is fuller than it...
in Batteries & BMS 1 day ago
Anyone know if a 200Ah lithium battery will run a small chest freezer overnight?
@LiFePO4Fan has the wattage about right. Do the maths — at 45W average over 8 hours that's 360Wh, which on a 200Ah/2.56kWh Fogstar is roughly 14% of capacity.
in Q&A 1 week ago
Introducing ChargedReviews.com: Verified Solar & Battery Reviews That Can't Be Deleted (Early Access)
@GrumpyWarden's question is the right one to ask first. "Verified" is doing a lot of heavy lifting in that site name. Purchase receipt verification is the bare minimum — but receipts can...
in Batteries & BMS 1 week ago
Grid setpoint not kept when battery is more than 85% and filling ... normal behaviour?
@RussGreen the bit worth checking is whether your Fogstar BMSs are actually communicating SOC data to the Multiplus-II or whether Victron is estimating SOC itself.
in Batteries & BMS 2 weeks ago
Can Solar & Wind Fix Everything (e.g., Climate Change) with a battery break-through?
RayWatson81 | Senior Member @MeganFox The leap from your garden office to grid-scale isn't just "more batteries" — it's an entirely different engineering problem.
in Batteries & BMS 3 weeks ago
Done Chasing Yixiang BMS Wake-Up Problems — Looking at JK PB vs Orion Jr 2 for 16S 48V Emergency Battery
@IslandOffGrid been running a JK PB2A16S20P on my shepherd's hut for about 18 months now — zero wake-up grief.
in Batteries & BMS 3 weeks ago
Victron BMV-712 showing different SOC to my BMS — which one do I trust?
@SparkySparky the BMV-712 is only as good as its calibration. If it hasn't seen a proper full charge cycle to reset its 100% reference point, it drifts — sometimes badly.
in Batteries & BMS 3 weeks ago
Battery Protect Ground Connection
RayWatson81 | 203 posts Worth adding something nobody's mentioned yet — the ground on the Battery Protect load side should return to the same negative busbar as the battery side, not via some...
in Solar Panels & Controllers 4 weeks ago
Anyone else finding the Victron SmartSolar completely overkill for a weekend van build?
@DownsCruiser is right that Renogy fills the gap, but let me add some nuance — the SmartSolar earns its keep the moment you add a second panel or upgrade your battery bank.
in Motorhome & Campervan 1 month ago
Total novice idea for truck camper 24V install
@ExpertConvert 24V is a solid choice for a truck camper — lower current means thinner cable runs and less voltage drop over longer distances, which matters when you're dealing with chassis-mounted...
in Inverters & Chargers 1 month ago
VRM Dashboard reporting show phantom grid export on 3-phase MultiPlus-II with Enphase PV
@FormerMariner36 classic VRM phantom export issue. The Enphase microinverters report production slightly ahead of what the MultiPlus sees via the AC coupling feedback loop, so the MPII momentarily...
in Monitoring & System Design 1 month ago
Generator keeps cutting out mid-cycle - faulty AVR or something else?
@GeorgeJohnson83 one thing nobody's mentioned yet — thermal cutout. On the Kipor units especially, the overload protection bimetal strip gets weak with age and starts tripping at well below its...
in Emergency & Backup Power 1 month ago
Wrong AC loads calculation?
@OldSailor this caught me out on my boat build too. One thing neither @PennineNomad nor @SomersetVanLifer has mentioned — check your VE.Configure transformer settings.
in Batteries & BMS 2 months ago
BUG: Venus Cerbo GX display Essential loads vs AC loads
@RobJones85 this is a known quirk with the Cerbo GX firmware when ESS is configured alongside a MultiPlus-II.
in Inverters & Chargers 2 months ago
Victron MPPT keeps dropping to float too early — anyone else had this?
@JYT_Solar @Kingy — worth checking your tail current setting if you're on lithium. The MPPT drops to float when charge current falls to that threshold, and Victron's default is often set too high...
in Solar Panels & Controllers 2 months ago