FLEXmax Charge Controllers

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String Sizing Tool for MX and FM Charge Controllers

Last post by raysun « Thu Feb 16, 2023 9:00 am
Replies: 100
by administrator » Fri Jul 18, 2008 10:36 am
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100 Replies

1582915 Views

Last post by raysun
Thu Feb 16, 2023 9:00 am

Topics

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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

78 Views

Last post by gpearce52
Wed Sep 27, 2023 5:43 am
Flexmax 60 ovrcurrent

Last post by SandyP « Tue Sep 26, 2023 1:46 am
Replies: 9
by Andy Brooks » Sat Sep 02, 2023 2:23 am

9 Replies

153 Views

Last post by SandyP
Tue Sep 26, 2023 1:46 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

38 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

176 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

51 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

117 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

242 Views

Last post by raysun
Wed Aug 23, 2023 10:44 pm
FM80 LiFePO4 settings

Last post by Echo5 « Tue Aug 22, 2023 12:03 pm
Replies: 7
by Echo5 » Tue Aug 08, 2023 2:53 am

7 Replies

197 Views

Last post by Echo5
Tue Aug 22, 2023 12:03 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

224 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

388 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

131 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

54 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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2
27 Replies

409 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

95 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

105 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

307 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

130 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

106 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

390 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

105 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

108 Views

Last post by Booalou
Tue Jun 27, 2023 4:35 pm
Flexmax 80 cycling on and off

Last post by raysun « Fri Jun 09, 2023 10:36 pm
Replies: 1
by forzadesign » Sat Jun 03, 2023 5:13 pm

1 Replies

126 Views

Last post by raysun
Fri Jun 09, 2023 10:36 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

2932 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

130 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

122 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

297 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

161 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

155 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

165 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

378 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

161 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
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2
34 Replies

688 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

176 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

129 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

5711 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

135 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

349 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

300 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

253 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

290 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

201 Views

Last post by raysun
Wed Jan 25, 2023 7:50 am
3 X FM80 + RTS + HUB

Last post by raysun « Tue Jan 17, 2023 5:19 am
Replies: 3
by Pocasluces » Fri Jan 13, 2023 12:04 pm

3 Replies

272 Views

Last post by raysun
Tue Jan 17, 2023 5:19 am
Adding 2nd array with 2nd FM80

Last post by jtzako « Mon Jan 16, 2023 5:47 pm
Replies: 7
by jtzako » Sun Jan 15, 2023 9:19 am

7 Replies

295 Views

Last post by jtzako
Mon Jan 16, 2023 5:47 pm
snoozing issue

Last post by raysun « Thu Jan 12, 2023 8:59 am
Replies: 1
by tech.mgr » Thu Jan 12, 2023 12:42 am

1 Replies

229 Views

Last post by raysun
Thu Jan 12, 2023 8:59 am
fm80-150vdc

Last post by tech.mgr « Tue Jan 10, 2023 5:57 am

by tech.mgr » Tue Jan 10, 2023 5:57 am

0 Replies

178 Views

Last post by tech.mgr
Tue Jan 10, 2023 5:57 am
MP80 CC marginal output in afternoon

Last post by raysun « Thu Jan 05, 2023 10:17 am
Replies: 3
by jainsw » Thu Jan 05, 2023 9:11 am

3 Replies

220 Views

Last post by raysun
Thu Jan 05, 2023 10:17 am
Voltage Calibration Issue

Last post by jcheil « Tue Jan 03, 2023 7:48 am
Replies: 2
by jcheil » Tue Jan 03, 2023 7:11 am

2 Replies

209 Views

Last post by jcheil
Tue Jan 03, 2023 7:48 am
Combining the positive wires from 2 charge controllers

Last post by raysun « Sun Dec 25, 2022 8:17 pm
Replies: 5
by pioneerMan » Fri Nov 18, 2022 8:45 pm

5 Replies

1904 Views

Last post by raysun
Sun Dec 25, 2022 8:17 pm
Cloudy/ foggy day settings FM60

Last post by Solarman7122 « Mon Dec 19, 2022 11:09 am
Replies: 5
by Solarman7122 » Sun Dec 18, 2022 10:54 pm

5 Replies

236 Views

Last post by Solarman7122
Mon Dec 19, 2022 11:09 am
Adding a 3rd FM 80

Last post by hrosendahl « Fri Dec 16, 2022 4:17 pm
Replies: 6
by hrosendahl » Fri Dec 09, 2022 8:25 am

6 Replies

1857 Views

Last post by hrosendahl
Fri Dec 16, 2022 4:17 pm

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