parallel connection smartsolar issue

Question

question

dtom asked May 23, '22

parallel connection smartsolar issue

Hello,

I have problem with three MPPT SmartSolar in parallel connection (48 V).

There are 2 x SmartSolar MPPT VE.Can 150/85 rev2 and 1 x SmartSolar Charger MPPT 250/60 rev2.

One of this (250/60) works normaly and always, with normal regulation

Other twoo (150/85) start to charging only if batteries voltage is bellow 44-45 V. When batt. voltage reaches cca 55-56 V, they stop with charging and starts again when is 44-45 V.

We have Cerbo in system.

Please, help.

smart solar set-up help

1

2 |3000

Attachments: Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

Alexandra ♦ commented · May 23, 2022 at 05:22 PM

@dtom

How are they connected? Are the settings all the same on each mppt?

Do you have DVCC activated?

What battery do you have? Does it have communication with the Cerbo?

0 ·

Modifications Space

Node Red Space

Answer 1 · 2022-05-24T05:59:15Z

dtom answered · May 24, 2022 at 05:59 AM

They are connected in parallel at same batteries.

Same settings on each.

We tried with and without DVCC.

Batteries OPzs 800 Ah.

Communication with Cerbo is OK.

1

2 |3000

Attachments: Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

Alexandra ♦ commented · May 24, 2022 at 06:59 PM

How are they connected to the cerbo? Sorry was not specific enough in the question.

Rebulk offset?

Adding a BMV may help.

0 ·

question