carmudgeons.com  

Go Back   carmudgeons.com > Automotive Forums > Car Talk

Reply
 
Thread Tools Display Modes
Old 11-29-2018, 04:26 PM   #1
rumatt
Mugwump
 
rumatt's Avatar
 
Join Date: Oct 2003
Carmudgeonly Ride: E46 330i, Chevy Colorado, Tesla Model 3
Location: NY
Posts: 17,475
Solar powered battery tenders

No, not for the tesla.

Do these work? They have a long tail of 1's in amazon reviews saying they are total shit.

Another concern is whether they can overcharge the battery. I'm thinking of this one because

a) It has a micro controller to avoid overcharging
b) Battery Tender should know WTF they're doing?

https://www.amazon.com/Battery-Tende.../dp/B004Q86JJ8

No idea whether 5W vs 10W...
rumatt is offline   Reply With Quote
Old 11-29-2018, 04:52 PM   #2
JST
195
 
JST's Avatar
 
Join Date: Oct 2003
Posts: 24,593
Quote:
Originally Posted by rumatt View Post
No, not for the tesla.

Do these work? They have a long tail of 1's in amazon reviews saying they are total shit.

Another concern is whether they can overcharge the battery. I'm thinking of this one because

a) It has a micro controller to avoid overcharging
b) Battery Tender should know WTF they're doing?

https://www.amazon.com/Battery-Tende.../dp/B004Q86JJ8

No idea whether 5W vs 10W...

I have one for the Porsche, but I'm not convinced it works. I don't know whether the cigarette lighter shuts off after X minutes.

I need to get a tender that actually hardwires into the battery. Just haven't gotten around to it yet.
JST is offline   Reply With Quote
Old 11-29-2018, 05:42 PM   #3
clyde
Chief title editor
 
clyde's Avatar
 
Join Date: Oct 2003
Posts: 26,599
Quote:
Originally Posted by rumatt View Post
They have a long tail of 1's in amazon reviews saying they are total shit.
Kinda wonder if their quality control is total shit. Some units work great and some don't? Also wonder what might potentially be bad and if that's a checkable and fixable thing.
__________________
OH NOES!!!!!1 MY CAR HAS T3H UND3R5T33R5555!!!!!!1oneone!!!!11

Team WTF?!
What are you gonna do?
clyde is offline   Reply With Quote
Old 11-29-2018, 06:47 PM   #4
Josh (PA)
Hello.
 
Josh (PA)'s Avatar
 
Join Date: Mar 2004
Carmudgeonly Ride: '09 X3, '11 328xiT, '11 135i C, '17 c2, '19 X5
Location: Downingtown, PA
Posts: 5,514
Quote:
Originally Posted by clyde View Post
Kinda wonder if their quality control is total shit. Some units work great and some don't? Also wonder what might potentially be bad and if that's a checkable and fixable thing.
Or just the 1s are in Seattle and the 5s are in San Diego
__________________
Josh (PA) -
'19 X5
'17 991.2 C2 Cab
'11 135i Convertible
'11 328xiT
'09 X3
Josh (PA) is online now   Reply With Quote
Old 11-29-2018, 07:24 PM   #5
clyde
Chief title editor
 
clyde's Avatar
 
Join Date: Oct 2003
Posts: 26,599
Quote:
Originally Posted by Josh (PA) View Post
Or just the 1s are in Seattle and the 5s are in San Diego
Really? Weird.
__________________
OH NOES!!!!!1 MY CAR HAS T3H UND3R5T33R5555!!!!!!1oneone!!!!11

Team WTF?!
What are you gonna do?
clyde is offline   Reply With Quote
Old 11-30-2018, 08:32 AM   #6
equ
Alphanumeric
 
equ's Avatar
 
Join Date: Aug 2005
Carmudgeonly Ride: 981S, 340i
Posts: 9,580
Quote:
Originally Posted by Josh (PA) View Post
Or just the 1s are in Seattle and the 5s are in San Diego
Sample bias.
equ is offline   Reply With Quote
Old 11-30-2018, 08:52 AM   #7
kognito
older fart than ZBB
 
kognito's Avatar
 
Join Date: Oct 2003
Location: On the road again
Posts: 8,887
Quote:
Originally Posted by JST View Post
I have one for the Porsche, but I'm not convinced it works. I don't know whether the cigarette lighter shuts off after X minutes.

I need to get a tender that actually hardwires into the battery. Just haven't gotten around to it yet.
THIS

I bet many of the bad reviews are from folks who don't know their car's control module shuts down just about everything after 10 minutes
__________________
2017 GMC Sierra 1500 SLE
2020 Fusion Titanium
kognito is offline   Reply With Quote
Old 12-15-2022, 10:53 AM   #8
Nick M3
Relic
 
Nick M3's Avatar
 
Join Date: Oct 2003
Location: Bethesda, MD
Posts: 12,438
I've decided to give a couple of these a shot. One in the truck and one in the 325is.

I ordered these:
https://www.amazon.com/dp/B08LG8J8NJ...t_details&th=1

Conveniently, it comes with every connector type you might want. (Note that they sell them with and without tender circuitry.)
__________________
2011 M3
2006 Sierra 2500HD 4WD LBZ/Allison
2004 X5 3.0i 6MT
1995 M3 S50B32
1990 325is
1989 M3 S54B32

Hers:
1989 325iX
1996 911 Turbo


Nick M3 is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Solar battery maintainer JST Car Talk 8 01-29-2017 11:29 AM


All times are GMT -4. The time now is 03:05 PM.


Powered by vBulletin® Version 3.7.1
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Forums © 2003-2008, 'Mudgeon Enterprises - Site hosting by AYN & Associates, LLC