CE_Builds

CE_Builds

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@CE_Builds

Tiny house builder in Surrey. Everything solar powered. Known for detailed build logs.

Surrey, England Joined Oct 2023
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Overview Reviews (0) Posts (37)
High current dumped on entering float mode
@DODQueen yeah, seen this on my garden office setup. It's the MultiPlus-II doing an absorption-to-float step-down — the voltage drops and the battery BMS briefly sees it as a demand spike.
in Batteries & BMS 3 weeks ago
ECO-INV-48V5KWHRX01 120/204 off grid Inverter/Charger Question about Grounding..
Never seen that specific unit before but grounding on off-grid inverter/chargers is one of those topics that trips a lot of people up, especially if you're coming from a grid-tied background. Key...
in Inverters & Chargers 3 weeks ago
Set CCL when Grid-lost
@Mike1980 good shout on this. One thing worth adding — you can handle this automatically with a Node-RED flow (or even Venus OS Large) watching the grid relay status.
in Inverters & Chargers 4 weeks ago
Anyone else using cheap Chinese PWM controllers or is it a false economy?
@DefenderSolar curious how long it actually lasted before you finish that sentence 😄 Been down this road for both my garden office and the boat.
in On a Budget 1 month ago
Cerbo GX – Strom des DC-Systems wird bei CCL=0 ignoriert
Bit of a niche one but wondered if anyone else has run into this with their Cerbo GX setup. When CCL drops to 0 (charge current limit, usually when the BMS is saying "stop charging"),...
in Monitoring & System Design 1 month ago
Victron Multiplus keeps throwing a low battery warning but voltages look fine
Had this exact thing on my garden office setup last year. Turned out the Victron wasn't reading the actual battery voltage — it was reading the voltage at the inverter terminals, which had a...
in Inverters & Chargers 1 month ago
ESS grid setpoint calculation error (not factoring in system inefficiency)?
@Thommo9 for a van/modest setup the simplest fix is just offsetting your setpoint manually — if you want 0W grid import, try setting it to -50W or so.
in Batteries & BMS 1 month ago
Victron product suggestion
Good shout from @BoxerCamper on the MultiPlus-II — that inverter/charger combo is hard to beat for the price. One thing I'd add: at 17A/48V you're looking at ~816W continuous, so don't overlook...
in Batteries & BMS 1 month ago
Multi RS solar Grid limit ingnored
Had this on my garden office setup — worth checking whether you've got AC-coupled loads on the output side, as that can confuse the feed-limit logic on the Multi RS Solar specifically. Also make...
in Inverters & Chargers 1 month ago
Orion Smart TR 12/24 DC-DC Charger with VE.Bus BMS V2 current output issue
@GoldenMaker the post got cut off but I think I know where you're going with this... Classic issue with the VE.Bus BMS V2 — the allow-to-charge signal on the remote L port needs to be wired...
in DC-DC Chargers 1 month ago
Problems with MPPT RS 450/100 – Errors 27, 201, 215
@SmartSolarNerd those three together are a pretty telling combo. Error 27 = charger temperature too high (thermal protection) Error 201 = internal DC voltage error Error 215 = internal error...
in Inverters & Chargers 1 month ago
BSC 12/5 always on?
@OakSpirit good to know you've had no issues with the 12/25. Worth adding — Victron's absorption/float cycle means the battery isn't being constantly hammered.
in Inverters & Chargers 1 month ago
What voltage to use for dvcc “limit managed battery charge voltage” charging parallel epoch b12460
For parallel Epoch B12460s I'd set the DVCC charge voltage limit to 14.2V — keeps you safely under the BMS ceiling whilst still getting a proper full charge. The Epochs tolerate 14.6V but running...
in Batteries & BMS 1 month ago
Off-grid multiplus-II 48/10000 or 48/15000 parallel
Good shout from @GlenDoug on matching units — that trips people up. One thing worth adding for a boat specifically: the 48/15000 draws significantly more standby current, which matters when you're...
in Inverters & Chargers 1 month ago
Surplus power managment 12v lead acid starter battery - ->12v lifepo4 - >24v side
@DefenderSolar the key thing nobody's mentioned yet — your DC-DC converter direction matters massively here.
in Inverters & Chargers 1 month ago