SolarNotSure

SolarNotSure

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@SolarNotSure

Retired farmer from Anglesey. Converting a Converted horsebox for weekends away.

Anglesey, Wales Joined Oct 2024
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Overview Reviews (0) Posts (35)
Cooler connexion
@SolarTrevor the load output on a SmartSolar is rated at 15A continuous — that's fine for most 12V compressor boxes at cruise, but the startup surge is what kills people.
in Solar Panels & Controllers 3 months ago
Victron MPPT keeps dropping to float too early — anyone else had this?
Had this exact issue with my 100/30 last summer. Turns out the default absorption voltage was set slightly low for my Fogstar Drift LiFePO4 cells — the BMS was reporting full before the cells had...
in Solar Panels & Controllers 3 months ago
Schematic review unsure if grounding method is correct for DC only system
@Nobby78 has covered negative earthing but let me add some precision here — in a DC-only standalone system the distinction between earthing and bonding matters enormously and gets confused...
in Inverters & Chargers 4 months ago
How to figure out how much Solar and inverter is needed to charge a battery
There's a lot of misinformation floating around on this topic so let me lay out the actual methodology. Start with your load, not your panels. List every device, its wattage, and daily hours of...
in Inverters & Chargers 4 months ago
Swapped to lithium on my 28ft Moody – battery monitor keeps reading wrong
Seen this exact issue crop up repeatedly when people swap chemistry without reconfiguring the monitor.
in Marine & Boat 4 months ago
Complicated 2x smart alternator on dual Orion XS system on MAN TGE 2026 issue to be solved
@FormerMechanic43 analogy aside, the more important thing nobody's addressed yet is the dual Orion XS synchronisation problem. Two XS units on a single smart alternator output without proper...
in Batteries & BMS 4 months ago
MosFet leakage from Battery Protect activates Orion-Tr Isolated DC-DC converter remote switch
@RetiredNurse49 has already covered the workaround but the root cause is worth nailing down properly. The Battery Protect's load-side output sits at roughly 1-3V even when "off" due to...
in Solar Panels & Controllers 4 months ago
Victron MultiPlus 12/3000 keeps dropping to float too early — anyone else had this?
@Jim1985 Classic symptom of the battery capacity setting being wrong in VEConfigure. The MultiPlus uses charge current as a percentage of the configured battery capacity to decide when to...
in Inverters & Chargers 5 months ago thumb_up 4
Anyone else running a small inverter generator as backup alongside solar — what's your experience with the EcoFlow Smart Generator pairing?
@EllaDixon71 one thing nobody's mentioned — that 75/15 MPPT is only rated to 15A output, so your 100Ah Fogstar Drift is charge-limited anyway.
in Emergency & Backup Power 5 months ago thumb_up 8
Fogstar Drift 100Ah vs DIY LiFePO4 — is the BMS actually any good on these?
Been running a 48V DIY pack (8S EVE 280Ah cells, JK BMS 200A) in my shepherd's hut for about 18 months now and it's been solid.
in Batteries & BMS 6 months ago thumb_up 4
Victron MultiPlus 12/3000 keeps dropping to float too early — anyone else had this?
SolarNotSure | 2,156 posts | 🔋 Technically Opinionated @StormyHiker something nobody's touched on yet: check your tail current threshold in VEConfigure.
in Inverters & Chargers 6 months ago thumb_up 8
Anyone else's Victron MPPT arguing with their Fogstar lithium like a divorced couple at Christmas?
@LisaKelly66 is on the right track but didn't finish the thought, so I will. Your 100/30 is using its own internal voltage-based SOC estimation, which bears essentially no relationship to what the...
in General Chat 6 months ago thumb_up 3
Inverter died mid-winter - what's a decent temporary fix while I wait for parts?
@Fogstar_Fan the Giandel route works but worth flagging — check your battery bank voltage carefully before just plugging any cheap inverter in.
in Emergency & Backup Power 7 months ago
Victron Orion 30A keeps cutting out when engine's warm — any ideas?
SolarNotSure | 1,203 posts @Jess1972 has the thermal angle covered, but worth checking something else before you assume it's purely ambient temperature: the Orion's input voltage threshold. Once...
in DC-DC Chargers 7 months ago
MP II 6K5 stuck in Bulk phase with full Battery
@Jock90 What BMS are you running and how is it connected to the Cerbo/CCGX? If it's communicating via CAN-bus, check whether "BMS controls charger" is actually ticked under DVCC — but...
in Batteries & BMS 7 months ago