Differences

This shows you the differences between two versions of the page.

--- haas:projects:solarbattery [2022/04/23 13:10] – [20220421] wedge
+++ haas:projects:solarbattery [2022/05/12 12:45] (current) – [20220505] wedge
@@ Line 141: / Line 141: @@
 ====20220423====
-Sourced better leads, although even then, I'm only getting 3.75A. I guess that's what I'm destined to settle with.
+Sourced better leads, although even then, I'm only getting 3.75A. I guess that's what I'm destined to settle with, if only using one set of leads. I jury-rigged a second lead, and am now enjoying 18-20W (5-5.5A), which is more respectable.
 Cell voltages drifted back to 3.29V/3.30V.
+Ready to take full advantage of this extra day of charging.
+====20220425====
+Took advantage of favourable conditions and went roof-top to rewire my panels for 24V operation.
+I ended up replacing almost all of the female MC4 connectors, deteriorated through exposure to the elements. I might want to go back and replace the remaining connectors just as a matter of course, a good 5 year update.
+I also removed a battery and rewired the battery bank to 24V, just because I could. So, yesterday I experienced operations in 24V, at a peak pulling 9+A from the panels (~220W). I guess time will tell: at peak generation I should be getting 16.66A from the panels.
+Shade is likely impeding power generation. Those two trees posing a greater obstacle than before.
+====20220426====
+Resuming my battery charging efforts.
+Cell voltages had fallen back to 3.30V.
+Presently charging to 3.5V, pulling 6.67A (> 20W).
+Around 9:30am, cells are all at 3.32V (with one cell showing signs of advancing to 3.33V).
+Around 2:30pm, cells are solidly at 3.32V (with some signs of advancing to 3.33V). 6.2A, still over 20W.
+====20220427====
+Left it charging overnight.
+Cells are now 3.33V, nearing 3.34V. Amperage has dropped to about 5A (17-18W).
+Still a far cry from where I'd like things to be.
+====20220428====
+Second consecutive overnight. We've been charging solid since Tuesday morning.
+Cells have reached 3.35V. Amperage is down to 3.45A (12W).
+====20220429====
+First serious run at the cabin. With panels wired for 24V and existing battery bank likewise, on a sunny day as this, I've been beyond pleased with the performance of my system.
+Cells drifted back to 3.33V.
+Now 4:18pm, cells measure once again at 3.35V (15W).
+====20220430====
+Another day of charging at the cabin.
+====20220501====
+While the sun is out, getting some charging in.
+Each resuming seems to restart us at the 3.32V/3.33V range, and a higher initial amperage (6A, 20W), and then dwindles throughout the day. Cells measuring 3.36V at the end of the day in recent days.
+====20220503====
+Started charging the second group of batteries.
+====20220505====
+Second group of batteries, charging since Tuesday, are now up to 3.32V.
+====20220512====
+After paralleling all 8 on Monday afternoon (20220509), and had upped the voltage to about 3.55V, I arrived today to find them fully charged at 3.4V (0A, 0W!)
+So, I upped it to 3.65V and left them to charge. Had a nice 7A+ going. Not sure if I am keen on leaving them to charge through Saturday. We will see. Pleased though that we seem to be wonderfully close to complete with this endeavour.
 =====References=====

Lab46 Wiki

User Tools

Site Tools

Differences

Page Tools