Brushless

I've tested it now and it still switches off randomly, on battery or on mains. I've gone over it with a soldering iron for dry joints and have tried warming the entire unit up with a heatgun but it still trips randomly. Once during last night after running on mains for ~8 hrs and once again this morning after ~30 mins on battery, but there has been no pattern to when it turns off. Anything else I can try or look for?

Thanks, it gives an error and switches off immediately without fence load. Haven't tried just on battery, will do so and will check heatsink temp too after a while.

@BritishRacingGreen I've got a Nemtek Druid 114 that just switches off by itself (blue screen) after about 30 mins, no errors, new battery and fence = 9 - Good. Any ideas why this would happen? BTW, "Float" on these batteries can be 13.6V-14.4V with "bulk" charge sometimes going to 14.8V which is a little high. Nowadays though, all these batteries seem to last just into their 13th month.

I have an old Mecer Sol-i-ax-5m inverter, what setting controls the recovery voltage i.e. the voltage at which point the inverter turns back on after a low battery voltage condition? Mine turns off at 48V but only comes back on at 52V even with full sun on the panels. I'd like it to come on at 50 or 51V especially if there's good sun input.

All SOLD

Hi all, I've upgraded another battery so have these LiFePO4 cells for sale again. They are used cells but are well balanced and producing 98% of their rated capacity. 16 x 3.2v, 105Ah, 51.2v, 5.3kWh - R12000 (or 2 x 24v - R6000 each) 16 x 3.2v, 100Ah, 51.2v, 5.1kWh - R12000 (or 2 x 24v - R6000 each) Can split into 4 x 12v 100Ah packs for camping or 4x4 Contact Graham on 0 8 3 4 0 0 6 1 2 3.

I had busbars cut from 2mm aluminum and 3D printed the holders. After some effort getting the cells all balanced it's all been working perfectly ever since.

Yes, way too long I thought, was sitting reading the manual to try see why when suddenly it turned on by itself (I had of course turned the switch on after powering up). When the AC eventually turned on the battery had reached 52V (battery is a 16 cell LFP, with charge cut-off set to 56V.) so I wondered if it wasn't the recovery voltage set to that. If I may here's the photo of the caps from the Axpert Repair thread hopefully saving anyone else in the same boat having to look for it in that (long) thread. As a minimum replace C79 and C78 (1000uF 16V electrolytic) - (ref Coulomb & BritishRacingGreen).

It has started up, thankfully! Not sure why it took so long to start up, about 30 mins before AC came on. It was at around 52V but that seems a bit high for recovery?

Thanks @Coulomb I found them and have replaced the 1000uF's and the 47uF. My 5Kw inverter now powers on and charges with no errors but AC is not starting. Any ideas why?

Same issue suddenly with my inverter. I can't see any 1000uF 16V caps on the board, is it perhaps the 470uF 500V caps that need to be replaced?

That is a good variance for the cells but rather check the cell imbalance at higher voltages, ie over 3.5v per cell. Any imbalance will show more clearly at either high or low voltages.

All sold.

Only 1 x 8 cell, 24V pack left - R6400

I'm not exactly sure, they are exactly the same type of cell but the colour of the shrinkwrap differs so maybe different batches.

Hi All, I have upgraded my battery so am selling some of my carefully looked-after pre-owned lithium cells. They're LiFePO4, 3.2V, 100Ah, 320Wh prismatic cells manufactured in 2021 and have done less than 300 cycles, always protected by a BMS. Note: Typical life cycles on these cells exceed 4000 so there's plenty good life in them yet. See screenshot of them perfectly top-balanced at 3.624V, with a 4mV cell voltage difference. Note also that they deliver 98% of stated capacity. Come with busbars and cell holders. Prices: 1.28kWh, 4 cells, 12.8v, 100Ah - R3200 2.56kWh, 8 cells, 25.6V, 100Ah - R6400 5.12kWh, 16 cells, 51.2V, 100Ah, - R12800 Accept Cash, GeoPay, Yoko or instant cleared EFT only. Collect in Randburg, no deliveries. Courier at own cost. Call or WhatsApp: Graham on 0834006123 or PM here. Grab some power before they're all gone and loadshedding comes back!

Just phone them, speak to Andre. When I was there on Friday they still had a container full left.

Here's my simplified STL for the clips, allows it to be printed upright with minimal support. SVoltBatteryClip.stl

Bought some of these cells new yesterday from Telenetix in Centurion (0861887847) for R1140 each (incl. VAT). Pity the busbars and clips aren't available here yet but I'm having some busbars CNC cut from aluminium. Will try 3D print some clips after modifying the STP file (*thanks NoordSolar for the link). Top balancing large capacity cells like these is going to be a challenge though as my biggest charger only does 15A. Anyone in JHB have a high amp LFP charger?

Changing those settings seems to make no difference on mine. Whether set to 20% or 100% or the "slope" enabled or disabled changes nothing that I can detect.

The website is still operational along with many happy reviews. Nothing on www.hellopeter.com for "sasolarsuppliers" or "sa solar suppliers" which is the first place I look if something seems suspicious (actually even if it doesn't). @KimO why not put something there?

Hi all, I'm looking for a 395W Canadian Solar panel (specifically a CS3W-395P). It's to replace a damaged panel so need the same type and size. Anyone have or know where I can get?

No luck so far, none of these companies have responded. Will keep looking.

Seems this is/was not an uncommon problem, the USB/COM board failing with this error. Does anyone know where I can get a replacement board (pictured)? Probably the same on most of the Axpert/Mecer type 3-5KVA inverters.