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magictime last won the day on April 10

magictime had the most liked content!

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    Forever Changes
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    Yorkshire (mostly)

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  1. We're on the canal at Beeston (Nottingham) and the river is certainly high and fast flowing on the other side of the lock. We saw an empty dinghy swept under the booms and over the weir yesterday.
  2. Thank you. Three hours to 'fully charged' (tail current c. 2% of capacity) from 35% DOD does sound pretty good. If I thought a set of lead carbon batteries were going to thrive through the winter on a 90-minute-ish charge from 50% to 85% every day, plus a minimum 3-hour full charge once a week, I'd certainly stop looking at generators and put that £300 or so towards the batteries. And the £100+ I'd expect to spend on fuel for the gennie every winter. Hmm.
  3. Do you have any sense of how the 'super fast charging' claims stack up, Peter? I don't know if the claim is just that these batteries are capable of taking an unusually high charge up to 80% or 90%, but slow right down for the last bit just as standard lead acid batteries do; or if they're actually supposed to take a higher charge even as batteries get close to full capacity.
  4. Hmm... at the end of the day I think I'd rather be an early adopter of an expensive product that may underperform, than of an expensive product that may be unsafe if not carefully integrated into a management system installed by someone with a good deal more expertise than me.
  5. All it needs now is some mug to shell out £960 on four of them in the hope that the claims being made are accurate... Now, where did I put my wallet...
  6. The closest I can find to an answer to this, given in practical terms, is given here in relation to Victron's lead carbon batteries by a member of Victron's staff: https://community.victronenergy.com/questions/22449/do-my-victron-lead-carbon-batteries-need-equalizin.html His advice is: "At "normal "usage an equalize isnt needed. Only when the charging is regular done less then perfect and/or the battery suffers from deep discharge. At max 50% DoD and a 100% full charge at least every week/two weeks i would recommend not to equalize." I'm assuming that his reason for thinking an equalization charge isn't needed with such a regime, is that there shouldn't be any build-up of sulphation on the plates. That would seem to fit with my understanding that while lead carbons aren't claimed to be completely immune to sulphation, they're a lot more resistant to it than standard lead acids. So, while regularly going a week between 100% charges with standard lead acids might be pushing it if you don't want to significantly shorten their lifespan, doing the same with lead carbons should be fine. If this is correct, and applies equally to other lead carbon batteries, they look like an excellent fit for off-grid winter boating, especially if CCing in a pattern that means the engine getting a good long run at least every week or two just in the course of cruising - which would suit us very well. (I say 'winter boating' because in our case, solar and frequent cruising should make the whole 100% charge thing a bit of a non-issue for us in summer.)
  7. I've been umm-ing and aah-ing about buying a Kipor IG770, which is their smallest & cheapest but adequate for our 30A charger. £263 is the cheapest I've seen it. (I'm having second thoughts about buying a generator at all though, partly because of concerns about safe storage, partly because running one is perceived as being a bit anti-social, and partly because I could do without the ongoing expense and faff involved in running it. I'm now considering taking a punt on Leoch lead carbon batteries, which are claimed to be faster charging and not to need a full charge as often as standard lead acid batteries. Running the engine for maybe 2 hours a day in winter, getting hot water into the bargain, I can live with; it was the extra 4 hours plus required to get standard lead acid batteries from maybe 80-odd percent to 100% that had me wondering about a generator.)
  8. No, it doesn't sound like it! Sounds like what they're calling an equalisation charge is more just about a good full charge at a normal voltage every couple of weeks? Not what I think of - high voltage to cause batteries to gassing etc. Thanks. I seem to recall, though, that Lifeline do specifically recommend regular equalisation charges, which is the very thing I'm hoping I can manage without (given the limitations of my off-grid set-up).
  9. Blimey, that does seem good going. What size panel, and how many amps does it put in in the middle of a good day? I have 200W of panels but I'm already having days where they're hovering between 1 and 3 amps during peak daylight hours, even in September. It's often next to nothing all day in the depths of winter. I am thinking of getting another panel or two, but even then there's no chance of them meeting our needs - there's the fridge for starters. Oh dear, I'm really not going to please everyone whatever I do, am I?😄 It's a semi trad, but wherever I put a gennie I think there'd be a theoretical risk of vapour sinking through the hatch and into the engine room. Anyway, having been tipped off about the wonders of lead carbon batteries on another thread, I'm now starting to think I might manage without a gennie (or lengthy daily engine running) after all... No it's still in use as a gas locker.
  10. Really? You wouldn't, say, knock, explain politely that the noise was bothering you, and ask me if I could move or run it another time? You sound like a real charmer. I won't respond in kind with threats against your property, but I would of course get the police involved if you acted in the way you describe. You might be disappointed to hear that you will probably never get the excuse to pick a fight with me or destroy my property as, being a nice considerate person, I am (as I implied with the comment about lithiums) actively investigating the battery options likely to require the least amount of static engine/generator running, with lead carbons currently the front runners.
  11. Thanks for this. The suggestion that a similar battery requires an equalization charge every fortnight is less than encouraging! Why should that be if the whole point is to avoid sulphation? A quick Google turns up some advice from Victron that their lead carbon batteries should not need equalization charges if fully charged at least every week or two, which fits with a winter cruising schedule, so if the Leochs are similar that would be OK. Hmm.
  12. Yeah fair enough. My leisure batteries are very easy to access; of course not everyone has that luxury. My starter battery is a awkward to get at and you can't see in properly to judge the electrolyte level, so yes it's a pain to top up and I look forward to replacing it with a sealed one when it dies!
  13. Intriguing, thank you. At least 50% more expensive than Trojan T105s... But if I thought they were genuinely going to be happy cycling between say 50% and 90%, meaning no need for hours and hours of engine/gennie running in winter to ensure full charges...
  14. Yeah it's this question about whether the lack of equalisation charges is likely to drastically shorten their lifespan that's making me hesitate, but so far nobody's ventured an opinion.
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