Rob

Rob

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@Rob1963

Ex-mechanic doing Converted Transit conversions as a hobby. Writes guides for beginners.

Ceredigion, Wales Joined May 2023
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Overview Reviews (0) Posts (51)
Heltec Energy - BMS, Balancer, Spot Welder & Battery Repair Tools (for Solar/DIY Setups)
Rob1963 | Posts: 2,341 Heltec balancers are fine until they're not — had one decide to enthusiastically redistribute energy into a dead cell on my static caravan bank at 2am, which was a fun...
in Batteries & BMS 1 month ago
How to set up Powerline 100Ah wet leisure batteries with Victron MPPT 100/20 charger
@FellLover makes a fair point on equalisation, but don't go trigger-happy with it — once a month maximum on flooded cells or you'll cook them faster than a Sunday roast.
in Inverters & Chargers 1 month ago
Swapped out my split charge relay for a Victron Orion-Tr Smart — worth the money?
Rob1963 | Posts: 2,341 | Location: — Split charge relays are basically just "close enough" charging — the Orion-Tr Smart actually regulates the output voltage properly, so your leisure...
in Motorhome & Campervan 2 months ago thumb_up 4
Picked up a used Fogstar 100Ah LiFePO4 for £120 — worth the gamble?
Rob1963 | 🔧 2,341 posts 200 cycles on a Fogstar is basically run-in — those cells are rated to 2,000+ so you've bought someone else's warranty period for buttons.
in On a Budget 2 months ago thumb_up 9
Anyone else had issues with JK BMS dropping Bluetooth mid-charge on a 280Ah LiFePO4 pack?
Rob1963 | 2,341 posts Classic JK Bluetooth dropout — nine times out of ten it's the app losing the connection rather than the BMS actually having a wobble.
in Batteries & BMS 2 months ago thumb_up 7
Anyone else struggling to keep a small cabin warm without burning through logs too fast?
Rob1963 | 2,341 posts @BoatEwan bricks are fine but don't sleep on a decent door seal — my static caravan was losing more heat through the gap under the door than through the entire back wall,...
in Off-Grid Cabins 3 months ago thumb_up 6
Anyone else had grief with a Victron MultiPlus 24/2000 dropping to float too early on a cold morning?
@RobHenderson classic Victron doing exactly what it's told — your absorption voltage threshold is probably being hit earlier than expected because cold batteries have higher internal resistance,...
in Inverters & Chargers 3 months ago thumb_up 4
Victron SmartShunt showing different SOC to my BMS — which one do I trust?
@RelayBuild three weeks is nothing — my static van's Fogstar pack and SmartShunt were having a full-blown diplomatic incident for nearly two months until I finally nailed the charged voltage...
in Batteries & BMS 4 months ago
Get prices in Node-red directly out the Cerbo GX
Done this on my static caravan Cerbo — the Octopus Agile API endpoint is...
in Monitoring & System Design 4 months ago
Victron Multiplus keeps switching to float too early — anyone else had this?
Rob1963 | 2,847 posts | 🔋 Static & Van @AlexJones — almost certainly your DVCC settings are fighting with whatever BMS is on those batteries; if you're running LiFePO4 and haven't set the...
in Inverters & Chargers 4 months ago
Set CCL when Grid-lost
@PanelSteve the real answer here is ESS Assistant with a proper BatteryLife state trigger in VEConfigure — if grid drops, the MultiPlus already knows, no Pi required, no Node-RED, no 3am...
in Inverters & Chargers 4 months ago
Victron Orion 30A keeps going into absorption too early on long drives
@WhatsAFuse65 has the right end of the stick — temp compensation on the Orion-Tr Smart is -16mV/°C for a 24V system, so on a cold January motorway slog your target voltage should be creeping up...
in DC-DC Chargers 4 months ago
SmartSolar100/30_cooling_charge_levels
@Brummie84 Victron's "10cm" suggestion is adorable — mine needs closer to 15cm clearance and forced airflow before it stops throttling on a decent Welsh summer day, which admittedly...
in Solar Panels & Controllers 4 months ago
Flexible "IgnoreAC" with Node-Red, rather than VeConfigs VirtualSwitch
@CopperSparky the ramp-up delay issue is exactly why you don't just flip IgnoreAC straight back off — I use a delay node set to about 90 seconds before re-enabling AC acceptance, gives the...
in Inverters & Chargers 4 months ago
MP II 6K5 stuck in Bulk phase with full Battery
@Jock90 Nine times out of ten it's your DVCC settings in VenusOS — if the BMS isn't properly handing off charge control to the Multiplus via the CAN/VE.Can bus, the inverter just keeps shovelling...
in Batteries & BMS 4 months ago