Shore Power use

[cuthound]

6 hours ago, Tacet said:

Buring one litre of LPG will typically produce around 2000 litres of water vapour.

 

Blimey. I'm surprised some people aren't doing this to obtain fresh water rather than using filtered canal water to avoid having to visit a water point... 🤣😂

Edited December 17, 2025 by cuthound
To remove a full stop masquerading as a space.

[Russ T]

31 minutes ago, cuthound said:

 

Blimey. I'm surprised some people aren't doing this to obtain fresh water rather than using filtered canal water to.avoid having to visit a water point... 🤣😂

That's what the dehumidifier is for innit.

[Alan de Enfield]

4 minutes ago, Russ T said:

That's what the dehumidifier is for innit.

 

Topping up your batteries  ? Yes.

[Russ T]

17 minutes ago, Alan de Enfield said:

 

Topping up your batteries  ? Yes.

Topping up my G&T

[IanD]

1 minute ago, Russ T said:

Topping up my G&T

With flat water? Eurggghhh... 😞 

[nicknorman]

44 minutes ago, Alan de Enfield said:

 

Topping up your batteries  ? Yes.

Hopefully not. Water from dehumidifiers is full of dust particles and other airborne contaminants. Not great for batteries.

[Russ T]

34 minutes ago, IanD said:

With flat water? Eurggghhh... 😞 

Yes, your'e quite right. I will save the flat water for my flat batteries. Do LFP batteries require water?

[IanD]

2 minutes ago, Russ T said:

Yes, your'e quite right. I will save the flat water for my flat batteries. Do LFP batteries require water?

No, they don't catch fire -- at least, unless you do something *horribly* wrong... 😉 

Edited December 17, 2025 by IanD

[Up-Side-Down]

On 16/12/2025 at 23:14, MtB said:

 

 

Its really disappointing when otherwise competent posters make basic technical errors like this.

 

I suspect you do actually know the difference between energy and power, and this is an accidental typo, but such carelessness confuses the hell out of people initially trying to understand the subject! 

 

 

I'm inclined to share your disappointment MtB! T'was written in haste and it's time I learned better. I will certainly try harder next time ... although I think you might agree, it was actually quite clear what I meant!!

[NB Thistle]

On 17/12/2025 at 11:15, Tacet said:

Very good. I'm not sure my chemistry ever achieved that level of sophistication.  But googling suggests less water from LPG (maybe 2 litres per kg) and a greater expansion between liquid & vapour (maybe 1500x).

In the fire service we were taught 1l of liquid water expands to 1800l of water vapour. That's how water puts out a fire best, you put just enough on to fully vaporise (removes more heat than just cooling) and displace the oxygen from around the combustion. The Swedes did a study and found you can extinguish an average sized living room completely involved in fire with 13l of water - correctly applied. Most people though just drown a fire!

[ditchcrawler]

12 minutes ago, NB Thistle said:

In the fire service we were taught 1l of liquid water expands to 1800l of water vapour. That's how water puts out a fire best, you put just enough on to fully vaporise (removes more heat than just cooling) and displace the oxygen from around the combustion. The Swedes did a study and found you can extinguish an average sized living room completely involved in fire with 13l of water - correctly applied. Most people though just drown a fire!

https://youtu.be/hBhNdy8BTPY?t=7  Youtube video of water mist extinguishers 

Edited December 19, 2025 by ditchcrawler

[cuthound]

2 hours ago, NB Thistle said:

In the fire service we were taught 1l of liquid water expands to 1800l of water vapour. That's how water puts out a fire best, you put just enough on to fully vaporise (removes more heat than just cooling) and displace the oxygen from around the combustion. The Swedes did a study and found you can extinguish an average sized living room completely involved in fire with 13l of water - correctly applied. Most people though just drown a fire!

 

This is the principle of water mist fire extinguishers.

 

I first came across them when building data centres. Safe to use on live electrical systems up to 35kV, will support human life (unlike many gas based extinguishing systems) and if triggered by a combination of heat, flame and smoke detectors when the fire first starts, they cause minimal damage.

[ditchcrawler]

6 minutes ago, cuthound said:

 

This is the principle of water mist fire extinguishers.

 

I first came across them when building data centres. Safe to use on live electrical systems up to 35kV, will support human life (unlike many gas based extinguishing systems) and if triggered by a combination of heat, flame and smoke detectors when the fire first starts, they cause minimal damage.

I was slightly involved with the installation of one when I worked Offshore but never witnessed it firing off 

[cuthound]

12 minutes ago, ditchcrawler said:

I was slightly involved with the installation of one when I worked Offshore but never witnessed it firing off 

 

I witnessed a demonstration of one extinguishing a 33kV HV transformer fire at Marriof's HQ. Impressive.

[nb Innisfree]

2 hours ago, NB Thistle said:

In the fire service we were taught 1l of liquid water expands to 1800l of water vapour. That's how water puts out a fire best, you put just enough on to fully vaporise (removes more heat than just cooling) and displace the oxygen from around the combustion. The Swedes did a study and found you can extinguish an average sized living room completely involved in fire with 13l of water - correctly applied. Most people though just drown a fire!

We were just starting on that method when I retired from FS and iin '02, but faced with a real goer & nowhere to shelter from intense heat while using that method I still preferred to blat it back with high pressure fog from a hose reel!

Old fashioned has been prob 😂

[Andyaero]

700w today, another good day forecast tomorrow. Yes currently in a marina with clear view of the sky, flat solid panels, not bothered to tilt them, no need.

I have no clue how much any of our equipment uses as I've never felt the need to scrutinise it that much. If we start to struggle then I may start to figure it out, but its not an issue right now.

TV, laptop, chainsaw batteries, not a problem, don't have an airfryer but do plug in or move when the washer/dryer is on.

We've not hit the depths of Jan/Feb but don't really have to make any concessions from land, doddle this boat life innit.

 

[cheesegas]

1 minute ago, Andyaero said:

700w today, another good day forecast tomorrow. Yes currently in a marina with clear view of the sky, flat solid panels, not bothered to tilt them, no need.

I have no clue how much any of our equipment uses as I've never felt the need to scrutinise it that much. If we start to struggle then I may start to figure it out, but its not an issue right now.

TV, laptop, chainsaw batteries, not a problem, don't have an airfryer but do plug in or move when the washer/dryer is on.

We've not hit the depths of Jan/Feb but don't really have to make any concessions from land, doddle this boat life innit.

 

It changes a lot on the towpath as more of it tends to be tree-lined than not, even when trying to moor with solar in mind - only 0.4kwh from my 1kw array today.

 

Also, it's a little pedantic I know, but remember the units for correctness - watts is power, watt-hours is energy. We're measuring the amount of energy that the solar panels have harvested, so I'm assuming you mean 700wh. 700w would be a peak power reading, which at this time of year is near on impossible with the amount of panels you'd fit on a narrowboat roof!

[Russ T]

3 minutes ago, cheesegas said:

It changes a lot on the towpath as more of it tends to be tree-lined than not, even when trying to moor with solar in mind - only 0.4kwh from my 1kw array today.

 

Also, it's a little pedantic I know, but remember the units for correctness - watts is power, watt-hours is energy. We're measuring the amount of energy that the solar panels have harvested, so I'm assuming you mean 700wh. 700w would be a peak power reading, which at this time of year is near on impossible with the amount of panels you'd fit on a narrowboat roof!

Being pedantic is it KWh, Wh or W?

[cheesegas]

Just now, Russ T said:

Being pedantic is it KWh, Wh or W?

Oops...yep, the W should be capitalised, the rest lower case. 😄

[NB Thistle]

2 hours ago, nb Innisfree said:

We were just starting on that method when I retired from FS and iin '02, but faced with a real goer & nowhere to shelter from intense heat while using that method I still preferred to blat it back with high pressure fog from a hose reel!

Old fashioned has been prob 😂

Some of my instructors were around then, times change and things develop. Our kit was far better than what you guys had to do the job in!