Jump to content

Unusual battery connection


chrisc

Recommended Posts

Went to visit a friend today who recently moved into a house in Hout Bay with an existing solar installation 

There are 4 x 260 watt panels that were installed in about 2013.  These 4 are connected all in series to an Growatt 5kW inverter.  Then there are another 4 x 390 watt panels fitted in 2021 but these are attached to a Victron 40 amp solar charger controller.  One handy thing is that there is a Bluetooth app which shows what these panels are doing 

Both the Growatt and Victron are connected to a Luxpower battery which has 4 battery connections 

The previous owner stated that this is the most efficient way of managing the battery.  Indeed, the battery’s SOC shows 96%

The charge rate and voltage settings for the Growatt and Victron have been set to same levels

 

Edited by chrisc
Link to comment
Share on other sites

I use the same type of setup. Axpert inverter with 2 Epever MPPT SCC and 3 Pylontech 3000 batteries

Axpert and Epever MPPT connected to batteries with busbar .

Epever connected in parallel with same battery settings..Axpert settings slightly lower.Epever is the better SCC. Much more settings to controller charging.

1ste Epever installed 1 year ago.

2nd Epever installed 2 months ago.

Solarassistant Rasp Pi connected to system. Only downside is the SA not recording PV from the Epever MPPT. Batteries info is reported by Solarassistant. Solarassisant working on program for Epever. 

Screenshot_20230124_114235_com.android.chrome~2.jpg

Link to comment
Share on other sites

I have another question about a (different) friend's installation which seems to be misbehaving

 

There is a Synerji (Axpert) 5Kw inverter, 4 x 455 watt panels and a Hubble AM2 battery

The inverter bulk charge and float charge have been set to the voltages in the battery manual, ie 53.6V for both

The inverter's display shows 53.6V

During blackout at night, the load varies between 45w and 90w as they only have a few lights on

The battery depletes very quickly and by 90 mins is down to 42V and then shuts down

He contacted the installer who is yet to respond

I looked at the charging settings and they appear to be correct

Edited by chrisc
Link to comment
Share on other sites

23 hours ago, chrisc said:

 

The inverter's display shows 53.6V

During blackout at night, the load varies between 45w and 90w as they only have a few lights on

The battery depletes very quickly and by 90 mins is down to 42V and then shuts down

 

@chrisca Battery that drops to 42v with 90 W is not good. What is the battery voltage when fully charged and no load.Best to have the battery checked by supplier.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...