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drparker151 avatar image
drparker151 asked

MPPT 100/30 troubleshooting, is it bad?

System: MPPT 100/30 and 150/70

Solar arrays A: single 200w panel, array B has 2s2p 200w panels. These are Rich Solar 24 panels with open circuit voltage spec of 45.4v

With array A on the 100/30 and array B on the 150/70, the 100/30 show a voltage of 45.2 and amps of .07. The 150/70 shows voltage of 72.9 and amps of 7.59.


If I swap the arrays, so B is on the 100/30 and A is the 150/70 I get voltage on the 100/30 of 89.6 and amps of .04 the 150/70 shows voltage of 36.8 and amps of 3.85.


So it appear that the 100/30 is reading voltage to high or cause the panels to see an open circuit?


Both MPPT controllers report correct battery voltage and both are in bulk mode.

Panel specs

img-0243.png

Array A: on 100/30

img-0237.png


Array A on 150/70

img-0241.png

MPPT Controllerserror
img-0243.png (1.1 MiB)
img-0237.png (313.3 KiB)
img-0241.png (316.2 KiB)
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klim8skeptic avatar image klim8skeptic ♦ commented ·
Could be a conflict between Smart Networking and DVCC if both are enabled.
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5 Answers
drparker151 avatar image
drparker151 answered ·

My dealer sent me the tests Victron requires before authorizing a warranty claim. Tests differ depending on MPPT model. Battery connected, pv disconnected, continuity between pv posts shows a short. Warranty repair needed.

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Paul B avatar image
Paul B answered ·

what are the internal settings for the 100/30 suspect the charge voltage settings are lower

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drparker151 avatar image
drparker151 answered ·

Was running DVCC, not smart networking. Both were disabled for this test. I've also tested with DVCC on and with DVCC off and smart networking on. I get the same results.


600ah of lithium batteries, both MPPT controllers set the same: absorption at 14.40 and float at 13.60

Both MPPT controllers to a Lynx distributor.


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Paul B avatar image
Paul B answered ·

If the battery voltage wont rise - It basically is not full, Lithiums can take all the power the solar can send it and the voltage will not rise until is at around 98% full. JUST keep charging them they will fill it just takes time and also depends on the amount of solar coming in and the size of the battery bank

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kevgermany answered ·

It does look like there's a fault. What happens if only the 100/30 is used? Battery is is pretty full, but there's a reasonable SC load for it to service.

It would be worth checking what the 100/30 does when the other MPPT is completely disconnected. Also check the cabling between the 100/30 and battery. Could be a problem there.

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Related Resources

MPPT Product Page

MPPT Error codes

MPPT 150/60 up to 250/70 Manual

Additional resources still need to be added for this topic