Descrepency in max charging amps

[MichaelK]

On page 9 of the "DIY Manual" (10-543-1 REV A) I spotted the Current Output Limits chart as indicating that the maximal current output for a 48V system was 78A.

When I bought my Midnight200 controller back in 2017, page 67 of the manual (10-001-1 REV: 1) indicated though that the Absolute Current Output for a 48V battery was 65A.  Since installation, I've had the max amperage set to 65A.

Since I have a 4500W array, I typically see clipping to 65A when running heavy loads, like my 240V well-pump, around noon.

So, the question is why the difference in the two amperage maximums?  Is it a firmware issue?  Currently I'm running firmware version 2193 on my 200s.

[FNG]

Hm I will have to look at this manual but a Classic 200 on a 48v battery is good for 78 Amps not 65. You should be able to turn it all the way up to 78 Amps. Please let me know if you cannot adjust it up to 78 Amps

[Wizbandit]

I know the Local App dashboard has this bug:

LOCAL APP BUG
If you have a CLASSIC 200 the OUT AMP LIMIT is locked to 65 amp MAX, on the MNGP it will be up to 80 amps.  Saving this from the Local App will set it to 65 amp MAX and will require you to go to the MNGP and set it back up.  The AMPS Dial on the Local App will be set to 65 MAX even if AMPS out can go over 65.

[MichaelK]

I don't use the local amp.  I use the menu buttons directly on the controller for all changes.

I have a second Midnight200 for my 24V workshop system.  I have that controller set at 70A because my manual documents 70A has the highest setting for 24V.

So, I know I can program the controller to >65A.

[ClassicCrazy]

I don't use the local amp.  I use the menu buttons directly on the controller for all changes.

I have a second Midnight200 for my 24V workshop system.  I have that controller set at 70A because my manual documents 70A has the highest setting for 24V.

So, I know I can program the controller to >65A.

Have you tried doing a factory  reset to see if that changes it ?
Release Notes:
A Factory Restore is Mandatory after this update (Please note you MUST update the Classic and MNGP first). This will erase all the custom settings so make sure you have them noted before hand. The New AUX functions can possibly change the settings in the existing AUX modes so if a factory restore is not done please verify all Aux settings.

To do a Factory Restore or a Quick Start first turn the battery and solar power to the Classic off. Next, turn the battery power back on while holding the Left and Right arrows. Hold the arrows until the Solar, Wind or Hydro screen pops up. Follow the on screen prompts and continue setup. Note: This will reset all settings to factory defaults. You will need to reset any custom settings such as Aux 1 and 2. You may want to write these settings down for reference prior to resetting the Classic.
https://www.midnitesolar.com/firmwareReport.php?firmware_ID=19&firmwareProduct_ID=1&act=edit

Larry

[MichaelK]

I don't use the local amp.  I use the menu buttons directly on the controller for all changes.

I have a second Midnight200 for my 24V workshop system.  I have that controller set at 70A because my manual documents 70A has the highest setting for 24V.

So, I know I can program the controller to >65A.

Have you tried doing a factory  reset to see if that changes it ?
Larry

You don't seem to understand my question?  My question is NOT why can't I increase the amps past 65.  My question, based on my manual instructions, is whether I should have the max amps set at 65 or 78?

[ClassicCrazy]

I don't use the local amp.  I use the menu buttons directly on the controller for all changes.

I have a second Midnight200 for my 24V workshop system.  I have that controller set at 70A because my manual documents 70A has the highest setting for 24V.

So, I know I can program the controller to >65A.

Have you tried doing a factory  reset to see if that changes it ?
Larry

You don't seem to understand my question?  My question is NOT why can't I increase the amps past 65.  My question, based on my manual instructions, is whether I should have the max amps set at 65 or 78?

Ryan above said you can raise it to 78 amps for 48v .
Larry

[Wizbandit]

Hmmm. My Firmware goes to 80 amps...  But usually if you run MAX AMPs on a hot day the Classic will protect itself by "sliding" the current back if it gets too hot...