MX60- no PV input voltage

Discussion about the MX60 Charge Controller

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My RE system: Offgrid northern British Columbia since 1995: 3 x 280 W Trina Solar/ MX60/ 12V 750 Ahr FLA/ Magnum MS2012/ Mini Magnum AC/DC loads panel/ Honda EU 2000i

MX60- no PV input voltage

Post by funksparky »

Hello, I hope someone can help. MX60 screen says sleeping. PV voltage is present in DC load center on array side of breaker with PV input breaker to MX60 turned off, but as soon as it is turned on it goes to zero. Multimeter neg probe on PV in NEG. MX 60 screen just shows battery voltage, no PV volts 000. Sleeping.

Seems like perhaps it's internally shorted between NEG and POS PV in? Just happened the other day, tried several shutdowns/ restarts, no change. Is it fried? The PV array was changed last fall and has been working really well. We are pushing the envelope a bit with Voc, (117) and array watts 840W, but even in the cold climate it seems to have been fine all winter. 3x Trina 280W in series. 12 battery bank.

Anyone have any input? We can still charge with the genny, but want to user the sun!
Thanks y'all
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Joined: Sat Apr 10, 2021 12:15 am
My RE system: MX60 MPPT, FX 24V 3000W Inverter Charger

Re: MX60- no PV input voltage

Post by MickW69 »

Well I am getting input voltage but no charging, hope someone got back to you eventually about this one.
Mike Curran
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My RE system: Outback - Garage roof:
- 8 (2x4) Evergreen 180's into one FM80 (2007/2020 - replaced MX60)
- 6 (2×3) ALEO S79-300's into one FM80 (2017)
- 2 grid-tied VFXR3524A-01's series stacked, replaced GVFX's (2020)
- 12 Surrette/Rolls 2V x 1766Ah (2007)
- Hub10.3, Mate3s, FNDC, RTS. Tigo ES maximizers on each PV module.

Westinghouse Solar - Barn roof: (2012)
- 30 (2x15) 235W panels with Enphase M215 microinverters, grid-tied

Outback Skybox - Barn roof: (2019)
- 14 Talesun 275W in series (DC array input to SB inverter/charger)
- 3 SimpliPhi 3.8 batteries, 48V, 225Ah total
- AC coupled input from 14 Talesun 275W, Enphase M215 microinverters

All self-designed and self-installed
Location: Chagrin Falls, Ohio

Re: MX60- no PV input voltage

Post by Mike Curran »

This thread viewtopic.php?f=9&t=13261&p=60163&hilit ... oot#p60163 suggests
For a different test, you can disconnect the PV from the charge controller. If the PV voltage on the screen goes to 0V then there is an internal problem with the MX60. PV voltage should rest somewhere below the battery voltage. On my 12V system at work, the charge controller reads 10.4V in and 13.8V out with the PV disconnected.
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