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Last Post by Transparent 4 weeks ago
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Transparent
 Transparent
(@transparent)
Illustrious Member Moderator
Joined: 4 years ago
Posts: 2799
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 months ago by Transparent

Save energy... recycle electrons!


   
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 AgentGeorge
(@agentgeorge)
Estimable Member Member
Joined: 10 months ago
Posts: 100
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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Joined: 10 months ago
Posts: 46
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
(@majordennisbloodnok)
Famed Member Moderator
Joined: 4 years ago
Posts: 1236
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
 Toodles
(@toodles)
Illustrious Member Contributor
Joined: 3 years ago
Posts: 2353
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
(@transparent)
Illustrious Member Moderator
Joined: 4 years ago
Posts: 2799
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
 Toodles
(@toodles)
Illustrious Member Contributor
Joined: 3 years ago
Posts: 2353
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)
Estimable Member Member
Joined: 10 months ago
Posts: 100
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
(@agentgeorge)
Estimable Member Member
Joined: 10 months ago
Posts: 100
29/10/2025 7:10 pm  

@toodles anyone who is afraid of a couple of test tickles



   
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 Batpred
(@batpred)
Honorable Member Member
Joined: 12 months ago
Posts: 335
29/10/2025 7:23 pm  

It is all getting ticklish...

 

And phased with all of this. Anyone seeding for a any solar farm anywhere? 😀 


16kWh Seplos Fogstar battery; 8kW Solis S6-EH1P8K-L-PLUS hybrid inverter; Ohme Home Pro EV charger; 100Amp head, HA lab on mini PC


   
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Toodles
 Toodles
(@toodles)
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Joined: 3 years ago
Posts: 2353
29/10/2025 10:31 pm  

@agentgeorge That’s a ittle too inscrotumable for me… Toodles.


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


   
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 AgentGeorge
(@agentgeorge)
Estimable Member Member
Joined: 10 months ago
Posts: 100
30/10/2025 7:38 am  

@toodles As we have had the topic issue resolved, we can edge off track a bit, and do a bit of testiculating; that’s wandering around a solar farm, waving ones hands in the air and talking bollox



   
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