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Search took 0.03 seconds. Search: Posts Made By: chris_g19
Forum: Electrical | Charging, Systems, Solar and Generators 04-09-2019, 08:48 PM
Replies: 153
Views: 40,815
Posted By chris_g19
It was $326 USD shipped from Germany. Google...

It was $326 USD shipped from Germany. Google "123 smart BMS"

If you're up for it, get rid of those relays and go with FETs. 100mA for a relay, ~1mA for a FET, plus they will last a lot longer...
Forum: Electrical | Charging, Systems, Solar and Generators 04-09-2019, 06:36 PM
Replies: 153
Views: 40,815
Posted By chris_g19
Ecotrek rebuild, drop in replacement

Ok, here I go.

Replacing my EcoTrek with a custom build. Reusing the same cells and battery box for a drop in replacement.

Attached is my super simple schematic. No relays, no battery...
Forum: Electrical | Charging, Systems, Solar and Generators 04-09-2019, 06:31 PM
Replies: 29
Views: 6,898
Posted By chris_g19
Stick with the popular and standard lifepo4,...

Stick with the popular and standard lifepo4, unless you have full warranty support. Lifepo4 is your only logical option if you want DIY options. It's also safest and most stable.

Sure you can...
Forum: Electrical | Charging, Systems, Solar and Generators 04-09-2019, 06:28 PM
Replies: 42
Views: 9,117
Posted By chris_g19
FYI, I like the tracer, it's good. Get the MT-50...

FYI, I like the tracer, it's good. Get the MT-50 so you can monitor and program it.

I reprogrammed my 3215 with no issues.

Any MPPT controller will be fine, they're all 12V compliant.
...
Forum: Electrical | Charging, Systems, Solar and Generators 04-09-2019, 06:23 PM
Replies: 21
Views: 10,411
Posted By chris_g19
I don't, but the parasitics I saw in Rev H we're...

I don't, but the parasitics I saw in Rev H we're from three sources
1) BMS, including cell balancing costs
2) lots of relays, why so many KS2!
3) battery heaters (only when it's cold!)
Forum: Electrical | Charging, Systems, Solar and Generators 04-09-2019, 06:18 PM
Replies: 21
Views: 10,411
Posted By chris_g19
Turn them all on while charging from the engine. ...

Turn them all on while charging from the engine. Then leave on only what you need during discharge. This is all back to the math based on the chemistry, has nothing to do with KS2's design. Not...
Forum: Electrical | Charging, Systems, Solar and Generators 04-09-2019, 06:15 PM
Replies: 21
Views: 10,411
Posted By chris_g19
Whoaaaww!!! Don't remove the AGM (might be a...

Whoaaaww!!! Don't remove the AGM (might be a basic lead acid) on the charging branch!!!! You'll blow up the alternator generator.

Once the lithiums are full they disconnect, if you don't have a...
Forum: Electrical | Charging, Systems, Solar and Generators 04-09-2019, 06:11 PM
Replies: 39
Views: 7,061
Posted By chris_g19
Self discharge will be about 5% as you say. The...

Self discharge will be about 5% as you say. The self discharge of concern is at cold temp because the battery heaters are 40W total. Those are wired internally, so hard to say if they only run when...
Forum: Electrical | Charging, Systems, Solar and Generators 04-05-2019, 02:53 AM
Replies: 21
Views: 9,272
Posted By chris_g19
Yeah, so I always get into these deep discussion...

Yeah, so I always get into these deep discussion with people on what is better/worse, however fact of the matter everyone is probably right for their situation if they have put enough thought into...
Forum: Electrical | Charging, Systems, Solar and Generators 04-04-2019, 11:42 PM
Replies: 21
Views: 9,272
Posted By chris_g19
Huh. Never heard of those before. Just googled...

Huh. Never heard of those before. Just googled it. Looks like the chemistry is same as AGM, but has the higher C rate as you mentioned. However, doesn't seem like a really great choice for a...
Forum: Electrical | Charging, Systems, Solar and Generators 04-04-2019, 09:53 PM
Replies: 21
Views: 9,272
Posted By chris_g19
Yeah the Balmar is awesome, I love that thing,...

Yeah the Balmar is awesome, I love that thing, but still need a smaller alternator because the balmar only reduces field down to 65%



Hey, my EcoTreks are underneath the chassis, near the...
Forum: Electrical | Charging, Systems, Solar and Generators 04-04-2019, 06:54 PM
Replies: 21
Views: 9,272
Posted By chris_g19
Good to know. I haven't seen the AGM ones, but...

Good to know. I haven't seen the AGM ones, but it must be different than mine which does 260A rated, which would destory an AGM pretty quick.
Forum: Electrical | Charging, Systems, Solar and Generators 04-04-2019, 06:41 PM
Replies: 21
Views: 9,272
Posted By chris_g19
Sounds like the seller is having trouble telling...

Sounds like the seller is having trouble telling you the details still.

If it has the Underhood generator, it must have the lithiums. AGMs can't really handle the high C-rate charge current...
Forum: Electrical | Charging, Systems, Solar and Generators 04-02-2019, 04:24 PM
Replies: 153
Views: 40,815
Posted By chris_g19
Whoaa that's expensive and also the old way of...

Whoaa that's expensive and also the old way of doing things. Go with the Victron battery protect which uses a FETs for the same price! They're parasitics are 1.5mA, where a relay will eat up...
Forum: Electrical | Charging, Systems, Solar and Generators 04-02-2019, 01:57 PM
Replies: 153
Views: 40,815
Posted By chris_g19
Yeah I totally agree. I try to get as much...

Yeah I totally agree. I try to get as much surface area in contact with my connections.

In general it's such a rats nest in there, and you're right getting in there for debugging is a 2 hours+...
Forum: Electrical | Charging, Systems, Solar and Generators 04-02-2019, 04:16 AM
Replies: 153
Views: 40,815
Posted By chris_g19
Here's the realest of it, fuse, contactors,...

Here's the realest of it, fuse, contactors, current clamp, tons of relays.

I admire their design, but it's a little elaborate and complex, tons of parasitics. KISS. Keep it simple ......
Forum: Electrical | Charging, Systems, Solar and Generators 04-01-2019, 07:04 PM
Replies: 153
Views: 40,815
Posted By chris_g19
Found the BMS, they using some weird thing I've...

Found the BMS, they using some weird thing I've never seen. Probably low cost and cheap.

I bet this is the failing component.
Forum: Electrical | Charging, Systems, Solar and Generators 04-01-2019, 06:59 PM
Replies: 153
Views: 40,815
Posted By chris_g19
Yeah. There are a few aftermarket BMS that will...

Yeah. There are a few aftermarket BMS that will work well. I like the Smart 123 BMS made by some guys in the Netherlands.

Pulled a cell. Doesn't really have much for identify marks on it, but...
Forum: Electrical | Charging, Systems, Solar and Generators 04-01-2019, 04:21 PM
Replies: 153
Views: 40,815
Posted By chris_g19
I'll check soon, but I'm pretty sure the BMS...

I'll check soon, but I'm pretty sure the BMS doesn't really turn off. It just allows charging/discharge or not. You never want to battery watchdog to stop protecting the battery. So could be...
Forum: Electrical | Charging, Systems, Solar and Generators 04-01-2019, 04:06 PM
Replies: 153
Views: 40,815
Posted By chris_g19
Yeah. I think the majority of us are not going...

Yeah. I think the majority of us are not going to need to replace the cells though. These things should last many years. I think it's something else that failed, probably the BMS. I tested my...
Forum: Electrical | Charging, Systems, Solar and Generators 04-01-2019, 03:49 PM
Replies: 153
Views: 40,815
Posted By chris_g19
Yes for sure. That's easy. I'll play more after...

Yes for sure. That's easy. I'll play more after work.
Forum: Electrical | Charging, Systems, Solar and Generators 04-01-2019, 02:58 PM
Replies: 153
Views: 40,815
Posted By chris_g19
Yeah, that's about right. I'll get into lots of...

Yeah, that's about right. I'll get into lots of detail with the components this week.

Yeah, that's the battery heaters there. I think I might hold up a manual control switch for them since I...
Forum: Electrical | Charging, Systems, Solar and Generators 04-01-2019, 03:47 AM
Replies: 153
Views: 40,815
Posted By chris_g19
This is Rev H Just cracked it open. Going...

This is Rev H

Just cracked it open. Going to make a schematic.

Build quality is much better than I expected honestly, real organized, nice battery heaters. Can't wait to test the cells. ...
Forum: General Discussion Forum 03-28-2019, 05:41 PM
Replies: 106
Views: 17,851
Posted By chris_g19
Yeah, these macerators don't like to be in...

Yeah, these macerators don't like to be in storage and not used. I'm a fultimer and have had no issues. Love my macerator. Just use it once a month and do a fresh water flush through it every once...
Forum: General Discussion Forum 03-28-2019, 05:37 PM
Replies: 35
Views: 13,087
Posted By chris_g19
DC will never be as good as AC for air...

DC will never be as good as AC for air conditioning. The efficiency of an inverter is better than the reduced efficiency of a DC compressor. AC compressor motors are great, why change it?

They...
Showing results 1 to 25 of 39
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