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Search took 0.00 seconds. Search: Posts Made By: ptourin
Forum: Tweaks, Mods & Projects 05-24-2016, 03:48 PM
Replies: 167
Views: 32,564
Posted By ptourin
Interesting vid. What about his claim that lith...

Interesting vid. What about his claim that lith phosphate batteries are happiest around midrange with a limited range of charge/discharge - so they'd be happiest if they were around 40-60% most of...
Forum: Tweaks, Mods & Projects 05-23-2016, 08:22 PM
Replies: 167
Views: 32,564
Posted By ptourin
I'm back from a week's trip so I've finally had...

I'm back from a week's trip so I've finally had more time to watch and graph my charging. I'm still switching both the charger and alternator off manually - I've tested hooking both up to my Victron...
Forum: Tweaks, Mods & Projects 05-11-2016, 03:56 PM
Replies: 167
Views: 32,564
Posted By ptourin
I hope I'm remembering this right - I've changed...

I hope I'm remembering this right - I've changed things around so many times <g>...
You're right, I'm working now just on SOC. I define 100% as up to 13.4 and down to C/10. I cut charging off at 99%...
Forum: Tweaks, Mods & Projects 05-11-2016, 11:43 AM
Replies: 167
Views: 32,564
Posted By ptourin
No time to post a graph now, but I wired up my...

No time to post a graph now, but I wired up my charging circuit using the Victron monitor to control the charger. I started at 70% and 13.3 volts. I immediately discovered that the highest I can set...
Forum: Tweaks, Mods & Projects 05-09-2016, 01:59 PM
Replies: 167
Views: 32,564
Posted By ptourin
Yeah, I agree about the voltage setpoint. I...

Yeah, I agree about the voltage setpoint. I define my 100% SOC as reaching 13.4v and dropping current to C/10, or 20A in my case - I do that because I want the system to think that under non-charging...
Forum: Tweaks, Mods & Projects 05-09-2016, 01:54 AM
Replies: 167
Views: 32,564
Posted By ptourin
What's not clear about that last paragraph of...

What's not clear about that last paragraph of yours is whether you push more charge in by using a higher charge voltage and cutting off at a low current setpoint. I should be able to do a simple test...
Forum: Tweaks, Mods & Projects 05-08-2016, 10:45 PM
Replies: 167
Views: 32,564
Posted By ptourin
I figured out how to open the isolator and turn...

I figured out how to open the isolator and turn off alternator charging, and this morning we had a 2-hour drive, so I took the RV and watched. Started at about 90% SOC. Alternator charging looked...
Forum: Tweaks, Mods & Projects 04-29-2016, 10:15 PM
Replies: 167
Views: 32,564
Posted By ptourin
Well back to the drawing board with the MB...

Well back to the drawing board with the MB wiring. I lifted the single wire on the D+ terminal - my understanding was that this wire went to the isolator relay and closed it when the engine was...
Forum: Tweaks, Mods & Projects 04-22-2016, 01:02 AM
Replies: 167
Views: 32,564
Posted By ptourin
SB may have lowered the full charge voltage, but...

SB may have lowered the full charge voltage, but they still recommend high charging voltages - "alternators charge[ing] around 14.4 - 14.8V ... will sufficiently charge a Smart Battery under normal...
Forum: Tweaks, Mods & Projects 04-21-2016, 10:55 PM
Replies: 167
Views: 32,564
Posted By ptourin
Update - the batteries were still at 13.56 at...

Update - the batteries were still at 13.56 at 5:30 this evening. So apparently that's the steady no-load voltage they dropped down to.
Forum: Tweaks, Mods & Projects 04-21-2016, 07:27 PM
Replies: 167
Views: 32,564
Posted By ptourin
They still say it - I think that's because they...

They still say it - I think that's because they assume their BPS will open the internal relay when the voltage goes down to 8V.

BTW - Dave Dykehouse, the Progressive Dynamics lithium charger rep,...
Forum: Tweaks, Mods & Projects 04-21-2016, 05:47 PM
Replies: 167
Views: 32,564
Posted By ptourin
I just looked at the SmartBattery site, which...

I just looked at the SmartBattery site, which adds to the confusion <g>...
They now say that cell voltage is 3.2 and nominal voltage is 12.8 - that's a change.
They say that their BPS high voltage...
Forum: Tweaks, Mods & Projects 04-21-2016, 02:10 PM
Replies: 167
Views: 32,564
Posted By ptourin
I also wondered about the 80 minute data - my...

I also wondered about the 80 minute data - my guess is that I wrote it down incorrectly. The monitor read 100% SOC at 102 minutes - voltage was 14.18 and current was 19.20A, still rather high. As...
Forum: Tweaks, Mods & Projects 04-21-2016, 02:54 AM
Replies: 167
Views: 32,564
Posted By ptourin
I did my most extensive charging run this...

I did my most extensive charging run this evening. I discharged with about a 50A load until I was down to 61% SOC - at which point I was reading 12.73 volts - the sag surprised me. I removed the load...
Forum: Tweaks, Mods & Projects 04-21-2016, 12:45 AM
Replies: 167
Views: 32,564
Posted By ptourin
I'm wondering if "fully charged" isn't a somewhat...

I'm wondering if "fully charged" isn't a somewhat narrow range between "I can stuff a bit more in there" and "whoops, I pushed too hard and damaged it". That is, I wonder if the manufacturers have...
Forum: Tweaks, Mods & Projects 04-20-2016, 11:41 PM
Replies: 167
Views: 32,564
Posted By ptourin
A bit more on my simpleminded battery cycling. As...

A bit more on my simpleminded battery cycling. As I said, yesterday I charged up to 14.53 volts and down to 2.2 amps before I shut the charger off. 30 minutes after I turned the charger off and...
Forum: Tweaks, Mods & Projects 04-20-2016, 11:31 PM
Replies: 167
Views: 32,564
Posted By ptourin
Booster, that chart is how I visualize charging -...

Booster, that chart is how I visualize charging - that you charge to a voltage higher than the full charge resting voltage, let the charge current drop, disconnect the charger, and (assuming no load,...
Forum: Tweaks, Mods & Projects 04-20-2016, 11:19 PM
Replies: 167
Views: 32,564
Posted By ptourin
Greg, I bought 2 100 Ah SmartBattery drop-ins -...

Greg, I bought 2 100 Ah SmartBattery drop-ins - that wouldn't be my choice now, but it's what I did back then. The company is very reticent about any technical info - their advertising is unclear and...
Forum: Tweaks, Mods & Projects 04-20-2016, 08:57 PM
Replies: 167
Views: 32,564
Posted By ptourin
Booster, the only thing you said that I want to...

Booster, the only thing you said that I want to understand better is:

"From all of this, I get the more and more believable (at least to me) idea that the charger voltage should be set at the...
Forum: Tweaks, Mods & Projects 04-20-2016, 04:33 PM
Replies: 167
Views: 32,564
Posted By ptourin
>Ptourin may be on the leading edge of actually...

>Ptourin may be on the leading edge of actually learning what is really going on with some of the lithium charging issues. Very interesting.<

Ptourin is on the leading edge of wandering around in...
Forum: Tweaks, Mods & Projects 04-20-2016, 12:18 PM
Replies: 167
Views: 32,564
Posted By ptourin
The charger is a Progressive Dynamics PD9160AL....

The charger is a Progressive Dynamics PD9160AL. Before winter, when I did my first tests, it did seem to stay up around 45-50 amps until the voltage climbed up in the 14's. Now the current starts to...
Forum: Tweaks, Mods & Projects 04-20-2016, 01:57 AM
Replies: 167
Views: 32,564
Posted By ptourin
Over the last few days I've been doing...

Over the last few days I've been doing charge/discharge tests, tracking voltage, amps and % SOC against time. I'm trying to get the monitor configured the way I want it, and seeing how the...
Forum: Tweaks, Mods & Projects 04-19-2016, 06:52 PM
Replies: 167
Views: 32,564
Posted By ptourin
I wonder if the 50% rule isn't just an...

I wonder if the 50% rule isn't just an over-simplification: "Keep your discharges to 50% or else you'll have to replace your battery frequently". The stuff we're talking over might be pretty daunting...
Forum: Tweaks, Mods & Projects 04-19-2016, 05:50 PM
Replies: 167
Views: 32,564
Posted By ptourin
That does make the lith batteries look good!...

That does make the lith batteries look good! Interesting that you don't gain all that much from light usage, when you figure it in lifetime Ah...
Forum: Tweaks, Mods & Projects 04-19-2016, 03:43 PM
Replies: 167
Views: 32,564
Posted By ptourin
Interesting chart! It looks right - anyone who's...

Interesting chart! It looks right - anyone who's looking at this should remember that the chart in #101 is logarithmic and this one is linear - don't get confused like I did <g>... So if this is...
Showing results 1 to 25 of 67
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