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59.After using the mppt150 / 70 tr for 12 months, the display light doesn't work. How to check what's wrong?

59.After using the mppt150 / 70 tr for 12 months, the display light doesn't work. How to check what's wrong?

2020-08-06

Hello, you can connect the MPPT control electronic accessories to check whether there is any display. If not, the fuse should be burnt out.

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