question

Michael Schmidt avatar image

SmartSolar MPT 150/100 not starts Charging

Hi everyone,

I have a problem with SmartSolar MPPT 150 / 100.

It is not starts Charging or starts much to late.
One MPPT 150/100 was already exchanged.
The new one has the same Behavior.

cust2.png

on the right its the replaced MPPT 150/100 left the old one (the old one started much to late, there was some hours pv voltage before he started loading)


Already checked is:

- the remote of contactor

- the mode is external control

- the Firmware is v3.02




need some help i dont know how to go on.

here two additional shots from the same unit without changing parameters.

NORMAL START AND BEHAVIOR

normal.png



LATE START (pv is long time in Voc "Voltage open circiut" without load)

late-start.png



mppt smart solar
cust1.png (78.3 KiB)
cust2.png (162.4 KiB)
normal.png (156.2 KiB)
late-start.png (187.7 KiB)
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2 Answers
mediacut avatar image
mediacut answered ·

Hello, if is 150/100 CAN please note is an hardware fault of the unit so must replace the unit.

I have 3 fault units. I buy them in separate weeks and all have same issues...

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kalito avatar image
kalito answered ·

What do you mean by starting late in the context of what is connected to the Mppt and how it is connected? That detail is required to understand your situation. The also note that I believe the mppt will only start charging if the voltage is atleast 5V above your battery voltage. If two units are giving you similar issues check your panel configuration and cabling.

What is the SOC of the batteries?

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Hi Kalito,

yes of course the Battery Voltage is much lower than 119V :)

i add you a picture of SOC / Battery Voltage / and Solar Charger

cust2.png

cust2.png (162.4 KiB)