Problems with MPPT RS 450/100 – Errors 27, 201, 215

DIY
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1

Hello everyone,

We are a Costa Rican team that works with indigenous communities, this specific equipment is installed in an indigenous community, this community is quite remote, so the only way to get electricity is with solar panels.

I have had a solar system installed since September 2021 with the following characteristics:

10 solar panels (2 groups of 5 in series, connected to the two inputs of the MPPT RS 450/100).

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Victron Energy Quattro 48 V 5000 VA 70 A inverter.

8 batteries (2 banks of 4).

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The problem is that the MPPT RS 450/100 – Tr operates intermittently and presents the following errors:

Err 27: Charger short circuit (overcurrent to the battery).

Err 201: Internal DC voltage error.

Err 215: Internal supply voltage error.

Observations:

The battery voltages drop to very low levels at certain times.

I have already checked connections and fuses, but the errors persist.

The data from the last 30 days is this:

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It is striking that there are moments in which it seems that it works (green circles):

The battery voltages are extremely low at some moments (red circle)

The errors are (blue circles): Errors 27, 201, 215

Currently the system is not operating

Questions:

Has anyone had similar experiences with these errors on the MPPT RS 450/100?

Do they know what could have caused the damage?

Thanks in advance for any guidance!

2

If the firmware is above 1.08 and it is stil there, it should be replaced the unit is faulty.

1 Like
3

Thanks. Do you think there were any factors that influenced or contributed to the battery deterioration?

Thanks again.

4

The logs just show the mppt is unable to read the DC correctly probably due to an internal fault. The error shows the same thing.
I have had this faliure wjth that error before. It was from a system that had six in it. It was the only one to fail like that. So it is likely a unit issue not a system issue. If a system or battery issue then all six should have failed.

The battery itself would need to be assessed separately. It is lead acid at a a certain age (2 years or less) and cycle life it is expected that there is deterioration and massive loss of capacity. Especially if they were not being charged properly. And if they didn’t have balancers in the system or the bank was undersized even more so.
But those are all set up and design problems.

5

Thanks