FLEXmax Charge Controllers

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String Sizing Tool for MX and FM Charge Controllers

Last post by raysun « Wed Oct 25, 2023 12:05 am
Replies: 102
by administrator » Fri Jul 18, 2008 10:36 am
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102 Replies

1583264 Views

Last post by raysun
Wed Oct 25, 2023 12:05 am

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6,825 Watts of 2 arrays only using 1,800 Watts to charge?

Last post by raysun « Fri Dec 01, 2023 3:10 pm
Replies: 26
by HawaiianDrummer » Thu Nov 02, 2023 8:54 pm
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26 Replies

303 Views

Last post by raysun
Fri Dec 01, 2023 3:10 pm
12V LiFePO4 settings using outback Flexmax60

Last post by richgood « Fri Nov 24, 2023 11:02 am
Replies: 4
by Affordable » Tue Mar 29, 2022 8:04 am

4 Replies

619 Views

Last post by richgood
Fri Nov 24, 2023 11:02 am
2 FM80 but only one will do an absorb charge

Last post by raysun « Sun Nov 19, 2023 2:04 pm
Replies: 3
by TBsolar » Wed Nov 15, 2023 11:06 am

3 Replies

53 Views

Last post by raysun
Sun Nov 19, 2023 2:04 pm
No input detected

Last post by raysun « Sat Nov 18, 2023 11:43 pm
Replies: 1
by vincjwan » Sat Nov 18, 2023 11:11 pm

1 Replies

19 Views

Last post by raysun
Sat Nov 18, 2023 11:43 pm
Flexmax 80 cycling on and off

Last post by raysun « Sat Nov 18, 2023 8:03 am
Replies: 7
by forzadesign » Sat Jun 03, 2023 5:13 pm

7 Replies

249 Views

Last post by raysun
Sat Nov 18, 2023 8:03 am
Multiple FlexMax’s

Last post by Jimdimitri « Fri Nov 17, 2023 8:35 am
Replies: 3
by Jimdimitri » Thu Nov 16, 2023 12:32 pm

3 Replies

44 Views

Last post by Jimdimitri
Fri Nov 17, 2023 8:35 am
FM80 LiFePO4 settings

Last post by raysun « Tue Nov 14, 2023 8:39 am
Replies: 9
by Echo5 » Tue Aug 08, 2023 2:53 am

9 Replies

354 Views

Last post by raysun
Tue Nov 14, 2023 8:39 am
FM80 shows charging at night

Last post by nielsboere « Sat Nov 11, 2023 12:00 pm
Replies: 1
by Discipher » Fri Dec 20, 2019 5:44 am

1 Replies

2264 Views

Last post by nielsboere
Sat Nov 11, 2023 12:00 pm
Flexmax 60 ovrcurrent

Last post by SandyP « Mon Nov 06, 2023 11:08 pm
Replies: 17
by Andy Brooks » Sat Sep 02, 2023 2:23 am

17 Replies

447 Views

Last post by SandyP
Mon Nov 06, 2023 11:08 pm
problem

Last post by pss « Mon Nov 06, 2023 5:29 pm
Replies: 2
by stelios » Sun Jan 30, 2022 5:43 am

2 Replies

322 Views

Last post by pss
Mon Nov 06, 2023 5:29 pm
Input battery A/H's

Last post by 706jim « Sat Oct 28, 2023 7:42 am
Replies: 5
by buck_canuck » Thu Oct 26, 2023 10:00 am

5 Replies

143 Views

Last post by 706jim
Sat Oct 28, 2023 7:42 am
Four batteries or eight

Last post by fcwlp « Wed Oct 25, 2023 10:04 am
Replies: 8
by 706jim » Mon Oct 23, 2023 8:07 pm

8 Replies

172 Views

Last post by fcwlp
Wed Oct 25, 2023 10:04 am
Download Data from 2 FM80

Last post by gpearce52 « Wed Sep 27, 2023 5:43 am
Replies: 4
by gpearce52 » Sat Sep 16, 2023 8:45 am

4 Replies

180 Views

Last post by gpearce52
Wed Sep 27, 2023 5:43 am
Flexmax 80 maximum battery bank size

Last post by wadethomastt « Mon Sep 25, 2023 5:48 pm
Replies: 2
by wadethomastt » Sat Sep 23, 2023 7:07 pm

2 Replies

136 Views

Last post by wadethomastt
Mon Sep 25, 2023 5:48 pm
Equalization Charge Questions

Last post by aaarneson « Tue Sep 12, 2023 6:05 am
Replies: 17
by aaarneson » Sun Sep 10, 2023 11:38 am

17 Replies

276 Views

Last post by aaarneson
Tue Sep 12, 2023 6:05 am
FM80 Won't come out of snooze

Last post by Mike Curran « Tue Aug 29, 2023 6:57 pm
Replies: 2
by acnomad » Sat Aug 26, 2023 5:16 pm

2 Replies

142 Views

Last post by Mike Curran
Tue Aug 29, 2023 6:57 pm
LiFePO4: Why Float?

Last post by Echo5 « Tue Aug 29, 2023 2:49 am
Replies: 6
by Echo5 » Sun Aug 27, 2023 9:15 am

6 Replies

223 Views

Last post by Echo5
Tue Aug 29, 2023 2:49 am
Over voltage with Solar Charge Controller FM80

Last post by raysun « Wed Aug 23, 2023 10:44 pm
Replies: 7
by Pascal FR » Wed Jul 26, 2023 6:39 am

7 Replies

333 Views

Last post by raysun
Wed Aug 23, 2023 10:44 pm
Rolls formulae not making sense to me: absorb hours = 0.42 * C20 / amps

Last post by raysun « Tue Aug 15, 2023 10:00 am
Replies: 13
by culmore » Sun Aug 13, 2023 3:27 am

13 Replies

318 Views

Last post by raysun
Tue Aug 15, 2023 10:00 am
Sunshine and Clouds and Temps. Oh my!

Last post by desertsun « Thu Aug 10, 2023 6:44 pm
Replies: 4
by raysun » Mon Dec 20, 2021 3:20 pm

4 Replies

454 Views

Last post by desertsun
Thu Aug 10, 2023 6:44 pm
Two strings of panels and 1 FM 80

Last post by raysun « Thu Aug 10, 2023 4:07 pm
Replies: 9
by dwierman » Fri Aug 04, 2023 1:56 am

9 Replies

227 Views

Last post by raysun
Thu Aug 10, 2023 4:07 pm
Gfci fault on second fm-100

Last post by Jesse Lankhaar « Mon Aug 07, 2023 2:04 pm
Replies: 1
by Fswank » Sun Aug 06, 2023 2:44 pm

1 Replies

130 Views

Last post by Jesse Lankhaar
Mon Aug 07, 2023 2:04 pm
FM80 and array sizing. Did I error?

Last post by EA6LE-ONE « Sun Aug 06, 2023 6:56 am
Replies: 27
by desertsun » Mon Jun 05, 2023 2:30 pm
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27 Replies

513 Views

Last post by EA6LE-ONE
Sun Aug 06, 2023 6:56 am
Flexmax 100 shutdowns

Last post by Mkuhnet « Thu Jul 27, 2023 4:45 pm
Replies: 2
by Mkuhnet » Wed Jul 26, 2023 12:35 pm

2 Replies

172 Views

Last post by Mkuhnet
Thu Jul 27, 2023 4:45 pm
Uh oh - Flexmax 80 stuck in FLOAT?

Last post by EA6LE-ONE « Sat Jul 22, 2023 8:23 am
Replies: 3
by lebugman » Thu Jul 20, 2023 4:08 pm

3 Replies

178 Views

Last post by EA6LE-ONE
Sat Jul 22, 2023 8:23 am
24v to 48v upgrade - PV array now outputting 50%

Last post by fcwlp « Wed Jul 19, 2023 6:59 am
Replies: 14
by mikedowdell » Wed Jul 12, 2023 11:59 am

14 Replies

427 Views

Last post by fcwlp
Wed Jul 19, 2023 6:59 am
Charge controllers cylcing bulk / absorb

Last post by pss « Sat Jul 15, 2023 7:44 am
Replies: 4
by mikedowdell » Tue Jul 11, 2023 11:37 am

4 Replies

212 Views

Last post by pss
Sat Jul 15, 2023 7:44 am
FlexMAX Charge controller drawing power?

Last post by raysun « Wed Jul 12, 2023 8:54 am
Replies: 3
by zaSmithTM » Fri Jul 07, 2023 6:36 am

3 Replies

180 Views

Last post by raysun
Wed Jul 12, 2023 8:54 am
Flexmax 80 wiring

Last post by raysun « Fri Jul 07, 2023 7:55 pm
Replies: 3
by paulshea57 » Fri Jul 07, 2023 4:17 pm

3 Replies

469 Views

Last post by raysun
Fri Jul 07, 2023 7:55 pm
2 new FM80s won't power up

Last post by pss « Fri Jul 07, 2023 1:27 pm
Replies: 2
by shannonsnow42 » Fri Jun 30, 2023 5:27 pm

2 Replies

177 Views

Last post by pss
Fri Jul 07, 2023 1:27 pm
Replaced my batteries with same but the MATE won’t power up

Last post by Booalou « Tue Jun 27, 2023 4:35 pm
Replies: 2
by Booalou » Mon Jun 26, 2023 6:37 pm

2 Replies

188 Views

Last post by Booalou
Tue Jun 27, 2023 4:35 pm
Quieting a noisy Flexmax-80

Last post by Mike Curran « Wed Jun 07, 2023 2:17 pm
Replies: 2
by jnh » Wed Oct 09, 2019 10:27 pm

2 Replies

3009 Views

Last post by Mike Curran
Wed Jun 07, 2023 2:17 pm
Max input voltage

Last post by jnh « Tue Jun 06, 2023 11:10 pm
Replies: 2
by unfortunate » Tue Jun 06, 2023 9:35 pm

2 Replies

208 Views

Last post by jnh
Tue Jun 06, 2023 11:10 pm
Flexmax 80 over amps

Last post by raysun « Mon Jun 05, 2023 1:24 pm
Replies: 3
by staggley » Mon Jun 05, 2023 10:13 am

3 Replies

193 Views

Last post by raysun
Mon Jun 05, 2023 1:24 pm
How to size a PV array for the FLEXmax charge controller

Last post by raysun « Thu Jun 01, 2023 8:52 am
Replies: 5
by raysun » Sun Feb 19, 2023 5:18 pm

5 Replies

386 Views

Last post by raysun
Thu Jun 01, 2023 8:52 am
Flexmax 60 night light Question

Last post by Rake1 « Tue May 16, 2023 3:34 pm
Replies: 7
by Rake1 » Tue May 16, 2023 12:39 pm

7 Replies

242 Views

Last post by Rake1
Tue May 16, 2023 3:34 pm
FM100 AFCI Charging and communication problems

Last post by JRKsolar « Thu May 11, 2023 2:03 pm
Replies: 3
by cmbrodman » Sun May 07, 2023 2:40 pm

3 Replies

236 Views

Last post by JRKsolar
Thu May 11, 2023 2:03 pm
PV Trigger

Last post by Mike Curran « Mon Apr 24, 2023 8:33 am
Replies: 2
by raysun » Sat Apr 22, 2023 8:13 pm

2 Replies

247 Views

Last post by Mike Curran
Mon Apr 24, 2023 8:33 am
FM60 MPPT and PVM modes.

Last post by raysun « Fri Apr 07, 2023 9:23 am
Replies: 13
by Graham Horn » Thu Apr 06, 2023 5:44 am

13 Replies

465 Views

Last post by raysun
Fri Apr 07, 2023 9:23 am
Highest ever from my panels!

Last post by JRHill « Mon Apr 03, 2023 2:21 pm
Replies: 1
by provo » Mon Apr 03, 2023 1:18 pm

1 Replies

227 Views

Last post by JRHill
Mon Apr 03, 2023 2:21 pm
System seems not to be charging properly after windstorms

Last post by raysun « Mon Apr 03, 2023 9:15 am
Replies: 34
by benwin » Mon Mar 20, 2023 12:48 am
1

2
34 Replies

820 Views

Last post by raysun
Mon Apr 03, 2023 9:15 am
Dual FM 80's, one not going into absorb phase

Last post by raysun « Sat Mar 25, 2023 9:13 am
Replies: 2
by moija » Sat Mar 25, 2023 3:57 am

2 Replies

252 Views

Last post by raysun
Sat Mar 25, 2023 9:13 am
Weather and Charge Rate

Last post by raysun « Mon Mar 13, 2023 5:39 pm

by raysun » Mon Mar 13, 2023 5:39 pm

0 Replies

201 Views

Last post by raysun
Mon Mar 13, 2023 5:39 pm
FM80 goes to Charged and stops charging the batteries

Last post by fcwlp « Sat Mar 04, 2023 3:52 pm
Replies: 19
by jose » Fri Jul 22, 2016 9:05 am

19 Replies

5938 Views

Last post by fcwlp
Sat Mar 04, 2023 3:52 pm
FM80 fails to start up

Last post by raysun « Mon Feb 13, 2023 9:37 am
Replies: 1
by BruceCanaFox » Fri Feb 10, 2023 11:52 am

1 Replies

220 Views

Last post by raysun
Mon Feb 13, 2023 9:37 am
FM80 voltage no amps

Last post by raysun « Sun Feb 05, 2023 8:28 am
Replies: 8
by jtzako » Sun Jan 29, 2023 10:54 am

8 Replies

432 Views

Last post by raysun
Sun Feb 05, 2023 8:28 am
Input and Output Voltages for Charge Controllers

Last post by raysun « Fri Feb 03, 2023 8:43 am
Replies: 4
by provo » Thu Feb 02, 2023 6:23 pm

4 Replies

352 Views

Last post by raysun
Fri Feb 03, 2023 8:43 am
Low Voltage Error

Last post by ChairMtn « Wed Feb 01, 2023 7:24 pm
Replies: 2
by ChairMtn » Mon Jan 30, 2023 2:39 pm

2 Replies

338 Views

Last post by ChairMtn
Wed Feb 01, 2023 7:24 pm
Calculating short circuit current for array on FM80?

Last post by EA6LE-ONE « Thu Jan 26, 2023 4:11 am
Replies: 8
by jtzako » Wed Jan 25, 2023 10:49 am

8 Replies

336 Views

Last post by EA6LE-ONE
Thu Jan 26, 2023 4:11 am
Temperature compensation without RTS

Last post by raysun « Wed Jan 25, 2023 7:50 am
Replies: 1
by Jaromato » Sat Jan 21, 2023 12:44 pm

1 Replies

250 Views

Last post by raysun
Wed Jan 25, 2023 7:50 am

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