Guru
Joined: 02/02/2017
Location: AustraliaPosts: 1421
| Posted: 07:25am 08 Jan 2023 |
Noneya:
for sure
I calibrate it when running using a DMM.
connect using the serial port, get the menu..
check Vin, cal Vin using DMM reading.
check Vout, cal Vout using DMM reading.
Now, to get a good calibration for the current sensors I use a cheapie
UNI-T device such as UT-203 which has a DC current feature, 0-40 Amps
using it's clamp thingie.
I always zero it when I hold it in the nearly identical position where I will
measure the current. Then I put the clamp over the positive lead and see what I see.
Tell the firmware the reading.
I think if we get +/- 5% accuracy then we are going well for current readings.
Oh, and you can repair this one, not that will blow up very often...
As you can see in the previous post, I have 2 of these and they've done nearly 8MW.hr of work. I like them a lot. I sold the 60 Amp Morningstar MPPT on ebay for cheap once I saw how well they work.
It's just a big-ass DC-DC converter with a bit of brains when it's all said and done.
The MS 60A mppt goes for what now?
this vendor has it for #1360 AUD
A 45 Amp version is $1130 AUD
OK. Fine.
One thing I saw in the internet was reports that you DO NOT EVER WANT TO send commands to stop and start the MS controller using modbus commands. You will blow it up.
And it's potted up with tough silicon gunk and not repairable.
FUK DAT SH1T.
These mppt builds are good for 45 Amps and probs good for 60 Amps with a good choke and large enough heat sink. All for about $150 or less. And we can repair them.