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Battery disconnected

Eliuccio · 2025-10-25T09:52:47Z

I apologise I have missed already a relevant thread on this. I essentially feel a bit desperate as it is more than one week now that my 2x Growatt 2.56kWh LiFePO4 battery cells are disconnected (with all the financial loss that is coming with it), and I could not come up with a simple solution. First, the installer basically dodged me as the 2-years workmanship are expired. Now it's clear they are not interested in helping. I did switch off and on the inverter, hoping that it would see the battery again. I also tried to check any physical damage to cables but it's very difficult to visualise the back and side of my batteries because they are really near the extarnal wall of the house encased in a wooden cabinet (pictures and video attached). Remote whatsapp support from Growatt was better, but essentially stopped when they asked me to open the battery and check if it was powered. I didn't feel confident doing that and asked my electrician to come. He couldn't so far, hence I will have to call someone else. I thought I would anyway post here in case someone else had a similar experience and would share how they handled it. Thanks in advance for any feedback!! Elia

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Transparent

(@transparent)

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29/10/2025 5:06 pm

That's all good news @eliuccio

... and extra thanks for posting here the photo of the trips with blue levers on the side of the Growatt ARK Battery Control Unit.

I'm pleased to note that the Cahill engineer has taken the trouble to actually explain a number of points,
rather than just switching the battery back on. 😀

His observation that the battery system is "isolated" matches what I had expected.

The word isolated can mean two different things in this situation.
What he (and I) mean here is that the battery 52v cabling is 'floating' and not tied to earth or anything else.

That's how it should be...
... and that's why my own batteries don't have the connections covered.
I can't get an electric shock by touching them, and nor can you.

I can think of two possible reasons why the battery trips went off.
The one which is most relevant is that there might've been a lightning strike nearby (within a couple of miles).

Sometimes trips pick up the passing spike and switch off.
No harm done.

Good news with having the RCBO changed for a bi-directional one.
That provides confidence that the safety protection will actually work if it needs to!

Whatever UKPN say about the Service Fuse upgrade from 60A, please let us know.

If they insist on a move to 3-phase, please don't be daunted.
We can help to explain what's involved both during and after that upgrade.

It would mean you'd have your Smart Meter changed too.
That's fine.
I'm a Smart Meter specialist and I can answer whatever you'd like to know.

An upgrade to 3-phase under these circumstances shouldn't require you to pay anything.

You will, however, be asked to divide the household circuits across more than one phase.
We have photos of your consumer units here, and I already have an idea how to achieve what's required at minimal cost for the electrician's time.

Let's wait and see what UKPN say first.

This post was modified 2 hours ago by Transparent

Save energy... recycle electrons!

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AgentGeorge

(@agentgeorge)

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29/10/2025 5:46 pm

@transparent there is big difference in LV vs HV for DC circuits compared AC.

A 9v PP3 battery will kill you if you are daft enough to put your tongue on it.

There are cases where children have swallowed button cells and not survived, they are 3.3V

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Eliuccio

(@eliuccio)

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Topic starter 29/10/2025 5:48 pm

@transparent lovely!

Thanks very much for the very valuable help provided! 🤩

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Majordennisbloodnok

(@majordennisbloodnok)

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29/10/2025 6:05 pm

Posted by: @agentgeorge

↑

...

There are cases where children have swallowed button cells and not survived

...

The same has been claimed of my sister-in-law's cooking, although in fairness that's more a case of salt and buttery.

OK, taxi's ordered.

105 m2 bungalow in South East England
Mitsubishi Ecodan 8.5 kW air source heat pump
18 x 360W solar panels
1 x 6 kW GroWatt battery and SPH5000 inverter
1 x Myenergi Zappi
1 x VW ID3
Raised beds for home-grown veg and chickens for eggs

"Semper in excretia; sumus solum profundum variat"

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Toodles

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29/10/2025 6:43 pm

@majordennisbloodnok Straight to the cells with you!

Toodles, heats his home with cold draughts and cooks food with magnets.

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Transparent

(@transparent)

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29/10/2025 6:51 pm

@agentgeorge if you'd like to start a new topic on the dangers of AC/DC electricity, please do so.
Tag me there and I'll contribute.

It is an important issue, and relevant for this forum.
But I don't think other readers will find it here on p.4 of a topic which is about a particular Home Battery Storage problem.

PS... and I do test PP3 batteries by touching them to my tongue! 😲

Save energy... recycle electrons!

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Toodles

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29/10/2025 6:57 pm

@transparent Who needs a test meter?!😉

Toodles, heats his home with cold draughts and cooks food with magnets.

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AgentGeorge

(@agentgeorge)

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29/10/2025 7:09 pm

Need to put a warming on this thread incase anyone is following it… If it’s a discharged pp3 you'll get a tizzy tongue, don't try it with a fresh one.

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AgentGeorge

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