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Post by Deleted on Jan 12, 2022 12:22:05 GMT
I've got several large solar panels between 325w (JA) and 415w (Canadian solar).
Most of these are around 20% efficiency.
Roof area of let's say 20m X 3.5m is 70 square metres.
Divide by 5 to get the efficiency equivalent.
So that is now around 14 square metres.
Solar radiation in January in UK average is around 0.58.
I make that around 8 kWh per day in January from this array which would mean you would need to be able to keep the boat warm with 330w of electricity if used continuously.
I find this improbable.
My math could be wrong though.
There are 23% efficiency panels which would marginally increase output but not that much really.
It just doesn't compute to use solar power for space heating in the UK in winter. There is not enough solar radiation to do it.
If there was then the weather would not be cold in the first place.
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Post by Deleted on Jan 12, 2022 12:28:25 GMT
I've got several large solar panels between 325w (JA) and 415w (Canadian solar). Most of these are around 21% efficiency. Roof area of let's say 20m X 3.5m is 70 square metres. Divide by 5 to get the efficiency equivalent. So that is now around 14 square metres. Solar radiation in January in UK average is around 0.58. I make that around 8 kWh per day in January from this array which would mean you would need to be able to keep the boat warm with 330w of electricity if used continuously. I find this improbable. My math could be wrong though. My blow heaters use less than 3amps when running, and similar with the fridge freezer. The solar works that plus the inverter happily by day during winter. Perhaps your system isn’t maximised to get full potential. |
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Post by Deleted on Jan 12, 2022 12:32:58 GMT
I'm not referring to my system or your system I am referring to the claim that there is a widebeam available for £250k that will stay warm in winter from solar power only.
It is a wild claim, and also suggested you have propulsion and dishwasher.
I understand what the point is and solar power is indeed very handy but this is not technically possible in the UK in winter unless you are happy to be in a very cold boat.
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Post by Deleted on Jan 12, 2022 12:34:41 GMT
Even today I am getting enough to run the blow heater and fridge freezer, and still a tiny bit going into the batts.  |
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Post by Deleted on Jan 12, 2022 12:35:46 GMT
I'm not referring to my system or your system I am referring to the claim that there is a widebeam available for £250k that will stay warm in winter from solar power only. It is a wild claim, and also suggested you have propulsion and dishwasher. I understand what the point is and solar power is indeed very handy but this is not technically possible in the UK in winter unless you are happy to be in a very cold boat. Like I said earlier, you’re way behind the times technology wise. |
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Post by Deleted on Jan 12, 2022 12:38:11 GMT
I've got the same app same hardware.
I'm making a point about the heating.
The article was referring to burning solid or fossil fuels for heating and it claimed that you could avoid this.
I know you can if you arrr on mains electric but with just solar on a UK based canal boat which fits on UK canals there just isn't enough space to gather enough energy.
Your 2.2a going in is useful but even if it was 22a (12v) that still won't keep the boat warm.
These blow heaters sound good by the way. 12v ones are they?
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Post by Deleted on Jan 12, 2022 12:39:25 GMT
I'm not referring to my system or your system I am referring to the claim that there is a widebeam available for £250k that will stay warm in winter from solar power only. It is a wild claim, and also suggested you have propulsion and dishwasher. I understand what the point is and solar power is indeed very handy but this is not technically possible in the UK in winter unless you are happy to be in a very cold boat. Like I said earlier, you’re way behind the times technology wise. Ok so what is the efficiency of the solar panels then? Has someone been raiding a stranded satellite or something.. |
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Post by kris on Jan 12, 2022 12:46:14 GMT
I've got the same app same hardware. I'm making a point about the heating. The article was referring to burning solid or fossil fuels for heating and it claimed that you could avoid this. I know you can if you arrr on mains electric but with just solar on a UK based canal boat which fits on UK canals there just isn't enough space to gather enough energy. Your 2.2a going in is useful but even if it was 22a (12v) that still won't keep the boat warm. These blow heaters sound good by the way. 12v ones are they? No the blow heaters are diesel air heaters I think, but you still need an electric current for them to run. So not heated completely from solar. Ps I’ve been getting 8.7amps all morning. |
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Post by Deleted on Jan 12, 2022 12:47:30 GMT
That sounds a bit like burning fossil fuels.
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Post by kris on Jan 12, 2022 12:49:53 GMT
That sounds a bit like burning fossil fuels. Don’t make as much ch smoke as a fire though. |
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Post by Deleted on Jan 12, 2022 12:51:15 GMT
I know solar works. I'm the first person to agree with this and have had various systems since 1995 on my boats but I dislike it when someone claims that "if you have the money" you can get a widebeam canal boat that will stay warm (presumably lived on all winter) from it's solar panels.
This is going to lead to disappointment.
You will either have a solid fuel burner or a fossil fuel burner.
It's not complicated and I really like having a stove but it seems odd that someone would claim you don't need one.
People do have different approaches to keeping warm on boats. Some people like it to be warm others will be happy to just wear more clothes.
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Post by Deleted on Jan 12, 2022 12:51:53 GMT
That sounds a bit like burning fossil fuels. Don’t make as much ch smoke as a fire though. That's true but I am in the process of taking apart this statement: "A brand new wide-beam canal boat with the roof space crammed with solar panels powering a top of the range battery bank that powers everything – propulsion, heating, lights, wide-screen telly, washing machine, dishwasher – ." Disclaimer needed: the craft will have diesel central heating. Perhaps I just took it too literally  |
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Post by Jim on Jan 12, 2022 13:01:25 GMT
That sounds a bit like burning fossil fuels. It is. We should've consulted his nurse. She would have given us a full and complete answer. What was the point of being devious. |
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Post by Deleted on Jan 12, 2022 13:10:12 GMT
To be fair if the boat was incredibly well insulated and had no windows and no ventilation it could work.
No fuel burning appliances so vents could be minimised and you could have some sort of oxygen depletion sensor to avoid dying.
Might actually be possible to keep warm just with body heat and the waste hot water from the washing machine and the dishwasher circulated around radiators.
Getting enough power to run the hot water on the appliances might be an interesting problem in late December while watching the wide-screen telly.
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Post by Jim on Jan 12, 2022 13:14:19 GMT
To be fair if the boat was incredibly well insulated and had no windows and no ventilation it could work. No fuel burning appliances so vents could be minimised and you could have some sort of oxygen depletion sensor to avoid dying. Might actually be possible to keep warm just with body heat and the waste hot water from the washing machine and the dishwasher circulated around radiators. Getting enough power to run the hot water on the appliances might be an interesting problem in late December while watching the wide-screen telly. We need someone who claims to have done it to try your proposition. |
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