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rowland al

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About rowland al

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  • Gender
    Male
  • Location
    Home Counties

Previous Fields

  • Occupation
    Retired Defence
  • Boat Location
    England, Wales

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466 profile views
  1. Batteries and being off grid

    I did wonder about traction batteries. Won't they need to be trickle charged every night to keep them in shape though?
  2. Batteries and being off grid

    Yes, I worked it out for 1a but my actual average load is about 3a. So more like 16.5ah over an evening.
  3. Batteries and being off grid

    So I guess that quoting that we use roughly 20,000 coulombs of electrical charge most evenings is out of the question then?
  4. Batteries and being off grid

    Here's another proverb for you. "Nobody likes a smart arse".
  5. Batteries and being off grid

    So am I! BTW, actually an amp (ampere) is a rate too. A coulomb is a quantity.
  6. Batteries and being off grid

    Isn't that a rate of a rate? Yes, I could have bought one for about £55 but I didn't want to add 'crap battery' to the list of my variables.
  7. Batteries and being off grid

    I meant more this statement - "fragility of a starter battery when incorrectly used as a leisure battery."
  8. Batteries and being off grid

    Can you show me any evidence to support your assertions?
  9. Batteries and being off grid

    No, I didn't say I am using 20a for 6 hours. I said 20a over the evening. Yes, you do have to choose words carefully.
  10. Batteries and being off grid

    No, you are right, it is a quantity. 3.33ah is a rate. Yes.
  11. Batteries and being off grid

    I don't really agree Tony. To say I use say 20 amps over 6 hours (evenings use) is a rate! I could say my consumption is 3.33ah if that's better? However it isn't. It might be 5ah in one hour and 1ah in another. BTW, thanks again for your help in getting me here
  12. Batteries and being off grid

    Having been through the pain of trying to understand my battery requirements as an off grid CC'er I thought I'd share my currwnt thoughts. Battery life is adversely affected when there is no means to trickle charge them up to near 100% capacity after each cycle. Solar panels do help (mainly in the summer) but I doubt the batteries will ever get close to 100% if the batteries are used on a daily basis. Those who have access to a shore line each night are in a much better position to keep their batteries healthy for a long time as they can be trickle charged for long periods at low cost. Diesel and petrol is very expensive way to trickle charge and you can't easily do it overnight. Find out what your daily power requirements are in amps. Someone here suggested I buy a clamp meter to measure the demand from the battery. It was very helpful in helping me check my estimated useage and voltage drops. Try to find ways of reducing your battery demand. The whole exercise has resulted in us changing to LED lights and getting a 12v TV which runs on only 1.5 amps. We also have a gas fridge which reduces our electricity consumption by a lot but obviously costs more in gas! Our consumption is now around 15-20 amps per evening. Once the power requirements are understood, choose the best battery to suit your needs. My current thoughts on this are that domestic batteries are more expensive than starter batteries and take longer to trickle charge them up to near 100% so are more likely to degrade quicker. We are experimenting with a single 12v , 75 ah silver/calcium starter battery. Cost just under £100. So far it has met all our needs. It never drops below 12.3v (70% capacity) after an evenings use and charges back up to 13.0v (measured after 2 hours settling time) with 2-3 hours engine running per day. It also seems to handle heavier loads like pumps with less voltage drop. I understand that starter batteries like to work between 70-100% capacity unlike deep cycle domestic batteries which are happier down to 50%. So I guess it's important to make sure they don't drop below this As I say, it's all a bit of an experiment at the moment and it's early days. Even if this single 12v battery cops out after 2 years. It cheaper to buy another one than 4 new domestics (which is where I started from!).
  13. Domestic water quality

    Funny you should say that. I was out with gastroenteritis for 3 weeks once after drinking orange squash out of a pint glass in a pub. I don't recall ever suffering from anything after drinking alcohol, or is it just that I can't remember?
  14. Domestic water quality

    We don't leave them in direct sunlight and the water from the standpipes have small amounts of floride and chlorine in it. Also this - http://www.cancerresearchuk.org/about-cancer/causes-of-cancer/cancer-controversies/plastic-bottles-and-cling-film Anyway we seem to be alive still too.
  15. Domestic water quality

    We boil all water from the main tank before consuming it or using it for cooking. For drinking water we just fill up a few plastic 5 litre water bottles from the stand pipe each time we fill our tank. You can get them (complete with some form of spring water) from places like Tescos for about £1. I'd never be happy drinking water from a boat water tank, well unless there was an emergency,
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