Guru
Joined: 31/12/2016
Location: AustraliaPosts: 1214
| Posted: 08:17am 18 Dec 2024 |
Thanks Peter, At the moment its not a problem as it still gets the battery charged, will add a bit more info, this is a new 16.5Kwh battery and its very first charge since getting the terminals welded on, mostly these start at about 50% SOC or less, so it took a long time to reach 54v with the solar available, the charge controller was left set at 54v float and 56v absorb, I never reached 56v I intended to stop and pull the solar input Fuse before then as the batteries would be sitting, didn't need them full.
When charging the FLA batteries the scan (just after)would easily exceed the set BV voltage even go up to the 60v max for a moment then it would switch to absorb, I admit I haven't watched it close enough for perfect moment by moment description as it settles moments after this and runs perfectly so all ok, also the FLA batteries are small and have a lot of charge resistance.
The LFP battery has a very low resistance, and its not even close to hitting the absorb voltage when I started, I would need to hit it with lot more Amps to get that voltage up.
Seen as this is the LFP's first charge it might be a bit different with day to day running because normal use the SOC will likely be over 60% and start charging at 53v, will have to see later.
As yet I don't think the code needs changes, its probably some settings need tweaking for my particular setup, we all have different builds and batteries so there is bound to be a few differences and personal settings to play with.
I think it would be great to have a lot more of these controllers running in the Wilde with different battery types, and see how they go.
Will start a new thread for that later.
EDIT
SOLVED.
I think it might have hit the current limit that was set in the menu, did see a star * or ? mark show up while it was doing the MPPT sweep etc.
So the difference is that the while running the FLA batteries in the shed it never got to the current limit that was set it always hit the voltage limit first and switched to absorb mode.
When the same setup was used on the LFP batteries it hit the current limit first not the voltage, also take into account I connected it up when there was plenty of solar available instead of the steady sunrise that would have been normal practice.
so I expected to increase the current limit to 50Amp later anyway.
Hope this makes sense.
Edited 2024-12-19 07:12 by Revlac