Idiot's guide to a self build battery

Lincs Robert
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Joined: Fri Mar 11, 2022 7:48 pm
Location: Lincolnshire

Re: Idiot's guide to a self build battery

#881

Post by Lincs Robert »

resybaby wrote: Sun Feb 11, 2024 7:26 pm
Hi, is something that they are happy to provide to people generally? I might be tempted myself if that’s the case 🤔
[/quote]

Robert, yes i think so. I just emailed them asking about the VAT removal and went from there - during our emails they offered the £50 'installation' VAT free idea.

Im collecting mine tomorrow, so will have a chat with them then if you want? and see if this is something they will do generally, will let you know what they say. I cant see they wouldnt as they were quite upfront with me and suggested it first.

Let me see what happens tomorrow and i'll report back on wednesday when im back home.
[/quote]

Yes please, that would be great, thanks 👍
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AlBargey
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Joined: Mon Oct 11, 2021 8:41 pm

Re: Idiot's guide to a self build battery

#882

Post by AlBargey »

Andy wrote: Sun Feb 11, 2024 2:57 pm Do you have a go to reliable table based on max continuous usage? I have been leaning back to 35mm but will take your advice and go 50mm. I had 50mm installed on the 100A mppt and they barely get warm. Thanks for pointing out my mistake.

.....The wire also has got a tighter bend on it. Why would it be so much hotter. I'll try and get some photos when its running next time.
A simple calculator is: https://midsummerenergy.co.uk/voltage-drop-calculator Obviously the cable should be rated for the max current it could carry at the lowest system voltage. It should also be protected by a fuse/breaker rated to protect the cable.

If your bend was too tight, it can snap the strands inside, especially if the tight bend radius is close to a crimped lug, the outer strands can't stretch and snap, reducing the current carrying capacity, causing heat. But normally it is from poor high resistance connections. I'm now in the habit of a light scotchbright pad and MEK or IPA before torqueing connections.
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Joeboy
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Re: Idiot's guide to a self build battery

#883

Post by Joeboy »

So it begins.. (again). :lol:

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Ripple 7kW WT & Gen to date 11MWh
28kWh LFPO4 storage
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Andy
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Re: Idiot's guide to a self build battery

#884

Post by Andy »

You didn’t waste any time :)
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Joeboy
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Re: Idiot's guide to a self build battery

#885

Post by Joeboy »

Glulam backboard this time. Actively trying to do as much of it as possible with existing stock.


Image

Image

Image
15.8kW PV SE, VI & DW
Ripple 7kW WT & Gen to date 11MWh
28kWh LFPO4 storage
95kWh Heater storage
12kWh 210ltr HWT.
73kWh HI5
Deep insulation, air leak ct'd home
Zoned GCH & Hive 2
WBSx2
Low energy bulbs
Veg patches & fruit trees
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Joeboy
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Location: Inverurie

Re: Idiot's guide to a self build battery

#886

Post by Joeboy »

These wee jobs really make me appreciate the cordless tool systems. Easypeasy, no joint strain and fast!

Will let the glue cure now and go again tomorrow, good fun@ :D

Image
15.8kW PV SE, VI & DW
Ripple 7kW WT & Gen to date 11MWh
28kWh LFPO4 storage
95kWh Heater storage
12kWh 210ltr HWT.
73kWh HI5
Deep insulation, air leak ct'd home
Zoned GCH & Hive 2
WBSx2
Low energy bulbs
Veg patches & fruit trees
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Fintray
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Re: Idiot's guide to a self build battery

#887

Post by Fintray »

Aye, you wouldn't have had half that amount of screws if you were doing it by hand :D
Only got to wait till April now though..

No battery related progress here but I did get a hole cut through the gable wall for my ASHP pipework.

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3.87kWp PV
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Joeboy
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Re: Idiot's guide to a self build battery

#888

Post by Joeboy »

Fintray wrote: Fri Feb 16, 2024 5:59 pm Aye, you wouldn't have had half that amount of screws if you were doing it by hand :D
Only got to wait till April now though..

No battery related progress here but I did get a hole cut through the gable wall for my ASHP pipework.

Image
Right through? All the way?

Screws cheap, wood dear! DIY! :D
15.8kW PV SE, VI & DW
Ripple 7kW WT & Gen to date 11MWh
28kWh LFPO4 storage
95kWh Heater storage
12kWh 210ltr HWT.
73kWh HI5
Deep insulation, air leak ct'd home
Zoned GCH & Hive 2
WBSx2
Low energy bulbs
Veg patches & fruit trees
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Fintray
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Re: Idiot's guide to a self build battery

#889

Post by Fintray »

Aye, that's the floor joist you see at the back.
3.87kWp PV
10.24kWp PV SolarEdge system
Tesla Powerwall 2
100 x 47mm elsewhere tubes (still being installed!)
MK2 PV router DHW diverter
Morso 5kW WBS
Nissan Leaf
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Joeboy
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Re: Idiot's guide to a self build battery

#890

Post by Joeboy »

:praise:
Fintray wrote: Fri Feb 16, 2024 6:02 pm Aye, that's the floor joist you see at the back.
15.8kW PV SE, VI & DW
Ripple 7kW WT & Gen to date 11MWh
28kWh LFPO4 storage
95kWh Heater storage
12kWh 210ltr HWT.
73kWh HI5
Deep insulation, air leak ct'd home
Zoned GCH & Hive 2
WBSx2
Low energy bulbs
Veg patches & fruit trees
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