Sethm

Hi Guys Recently if started getting this error: F18HW_Ac_OverCurr_Fault when Eskom load shedding ends. Not every time, but a few times over the last 3 weeks. Happened at 4.30 this morning, no large loads and system has been installed since January this year. Any idea what could be causing it or what needs to be checked? Thanks

And don't forget the grid tied wont assist if the Grid is down.

https://www.hubblelithium.co.za/sunsynk-hubble-setup.html 5KW Sunsynk support coming soon.

Updated my system: Still running my 3KVA Axpert Using 2 X EPSolar Tracer AN's (New) Upgraded panels from having 4 in parallel (Axpert charger went wonky and wouldnt go out of boost mode) to now having 2S2P for each controller (8 panels total) . Already seeing nice increases in power from old 4 panels to having the series connection and benefiting from the higher PV. Still have my first bank of 4 T105's leaking acid (Almost seems like its coming form the terminals) and the other 4 showing no issues of leakage. Put a large load on today, Axpert measured 23.8V and MPPT's were showing 25.2V with a 70amp load coming from an induction cooker. Considering adding a small Solis on grid system in the near future to help with those items that my system cant connect to.

If my controller is only set to 30 amps would the 32amp not be sufficient? These fuses above only go to 25amps, so would that not blow if i add an additional panel? Or should i just look at going to 48v system a bit earlier than planned?

All in parallel (24V Axpert inverter wont allow my voltage to go anything in series)

4X 300W panels with a 8-10m run of cable. Controller has never shown more than 21 amps as its max.

Ill take a look when i get home this afternoon.

No lighting in JHb this afternoon. Discovered and in the progress of rewiring from the panels as i have added a panel and want to add another and realised the cable is too thin (4 o r6 mm currently and going to 16mm as its coming from the roof of a double story to the ground floor). My domestic called me to say she could smell burning so i got home as quick as i could. Electrician came by and suspects either there was a fault in the fuse holder or the cable got to hot at the connection and started melting the plastic. Anyone know if those fuse holders are DC rated? Cant find much online. But will be replacing both with 100% DC rated fuses next week.

Anyone seen something like this before? Burnt fuse holder and fuse on my income PV connection:

Plan will be to switch over to a 48v in the near future, but will keep it at 24v for the next few months and then replace the axpert with a 48v version and rewire panels in series, Maybe next year

Seem to have found the problem. Axpert not always switching over to float charge, thus keeping the battery voltage too high for too long. Will be running a new solar controller to charge the batteries independently of the Axpert.

Setting 2 - 20Amps Setting 11 irrelevant as i dont charge from the grid.

HA02 attached to each battery. So seems unlikely.

I did. He recommended a 28.4 bulk and a 27.4v float. Happy to drop the bulk, not so sure about raising the float though.