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Post by bodger on Jul 1, 2019 21:06:34 GMT
boutros boutros gali ........................ or summat like that
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Post by naughtyfox on Jul 1, 2019 21:07:02 GMT
Biggus dickus "Stwike" him, centurion, very "woughly."
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Post by Deleted on Jul 1, 2019 21:08:39 GMT
Pica pica ... magpie.
There's a boat with that name too.
Rog
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Post by peterboat on Sept 17, 2019 10:25:25 GMT
Resurrecting this thread for a bit, I have acquired more and different batteries for my big boat it will have 30 x 36 volt LifePo4s, they will be 2 x 15 in parallel then in series to make a 72 volt and 36KWH [nominal] for drive, it will increase the range and power available. I am adding another 3 solar panels to take me up to 4.5 KW. The only other thing to do is fit the new controller when it arrives, which should help with power as well
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Post by Telemachus on Sept 17, 2019 11:29:23 GMT
Resurrecting this thread for a bit, I have acquired more and different batteries for my big boat it will have 30 x 36 volt LifePo4s, they will be 2 x 15 in parallel then in series to make a 72 volt and 36KWH [nominal] for drive, it will increase the range and power available. I am adding another 3 solar panels to take me up to 4.5 KW. The only other thing to do is fit the new controller when it arrives, which should help with power as well Roughly how many kw does it use when propelling the boat at normal speeds?
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Post by Deleted on Sept 17, 2019 11:38:50 GMT
How much does 30 of those batteries cost if you don't mind me asking ?
Rog
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Post by Telemachus on Sept 17, 2019 11:42:43 GMT
How much does 36 of those batteries cost if you don't mind me asking ? Rog He only bought 30!
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Post by peterboat on Sept 17, 2019 13:06:19 GMT
Resurrecting this thread for a bit, I have acquired more and different batteries for my big boat it will have 30 x 36 volt LifePo4s, they will be 2 x 15 in parallel then in series to make a 72 volt and 36KWH [nominal] for drive, it will increase the range and power available. I am adding another 3 solar panels to take me up to 4.5 KW. The only other thing to do is fit the new controller when it arrives, which should help with power as well Roughly how many kw does it use when propelling the boat at normal speeds? 3 to 3.3 kw equals 3 mph on its older 60 volt system, so its roughly 4 hp, the batteries are from an electric bus and are supposed to have 80% capacity but I will know for sure when I have fully charged them. At the moment 9 of them in parallel have taken 6kwh and are at 39.4 volts they are still on bulk charge. The batteries cost me 2.5k which is good price
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Post by Telemachus on Sept 17, 2019 13:27:12 GMT
Roughly how many kw does it use when propelling the boat at normal speeds? 3 to 3.3 kw equals 3 mph on its older 60 volt system, so its roughly 4 hp, the batteries are from an electric bus and are supposed to have 80% capacity but I will know for sure when I have fully charged them. At the moment 9 of them in parallel have taken 6kwh and are at 39.4 volts they are still on bulk charge. The batteries cost me 2.5k which is good price So about 10 hrs running with no solar input and, on a good day (with not many trees or tunnels!), pretty much all run on solar. Which is good!
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Post by Deleted on Sept 17, 2019 15:39:15 GMT
4hp is an eye opening figure for propelling a 57x12ft barge..
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Post by peterboat on Sept 17, 2019 17:10:54 GMT
4hp is an eye opening figure for propelling a 57x12ft barge.. Not really we can all pull them along at a couple of MPH so why shouldnt 4 HP do it? once you start to go quicker then you see those KW going up. Diesels are really bad at the job they are operating way below maximum efficiency, it would be better to have a small turbo charged diesel running through a 3 to 1 gearbox, it could then have a cat DPF and ad blue and maybe a NOX capture system, a one litre engine would do it nicely
Batteries are at 39 volts on rest and they now have 8.4 kwhs in them
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Post by Clinton Cool on Sept 17, 2019 18:53:53 GMT
Roughly how many kw does it use when propelling the boat at normal speeds? 3 to 3.3 kw equals 3 mph on its older 60 volt system, so its roughly 4 hp, the batteries are from an electric bus and are supposed to have 80% capacity but I will know for sure when I have fully charged them. At the moment 9 of them in parallel have taken 6kwh and are at 39.4 volts they are still on bulk charge. The batteries cost me 2.5k which is good price Comparing this to my boat; I don't understand. My 11hp engine pushes my 35ft narrow boat at around 3mph flat out. How can just over a third of this power push a much heavier boat along at the same speed?
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Post by Deleted on Sept 17, 2019 19:03:45 GMT
Prop is too small I would guess. The good side of that being economy and decent alternator output.
Plus the fisherman syndrome kicks in with electric propulsion.
If your 35ft nb needs to have 11hp engine running at full speed to maintain 3mph there is a problem somewhere. Does it have a pointy end?
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Post by Clinton Cool on Sept 17, 2019 19:51:21 GMT
To be honest I reckon it doesn't get anywhere close to maximum revs. If anything it might be over propped. Other boats with bigger engines don't go much faster in the narrow, shallow canals. I know this because I've recorded my speed in my kayak at 3 1/2 miles an hour. I'm almost always going faster than any narrow boats. In 4 years, I kayak a few miles most days I've been overtaken once, that was by a cruiser on full belt.
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Post by peterboat on Sept 18, 2019 8:54:19 GMT
3 to 3.3 kw equals 3 mph on its older 60 volt system, so its roughly 4 hp, the batteries are from an electric bus and are supposed to have 80% capacity but I will know for sure when I have fully charged them. At the moment 9 of them in parallel have taken 6kwh and are at 39.4 volts they are still on bulk charge. The batteries cost me 2.5k which is good price Comparing this to my boat; I don't understand. My 11hp engine pushes my 35ft narrow boat at around 3mph flat out. How can just over a third of this power push a much heavier boat along at the same speed? 50 foot wide 9 foot deep navigation thats why it works well at 4 hp, its horses for courses, when I went to Sheffield it was weedy and shallow so hard going!
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