Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Sept 5, 2020 16:00:11 GMT
Not really which is in fact why I had decided not to bother.
I never have any power problems whatsoever during the summer but during winter when less boating happens I could do with a little extra. I do know that solar does not do much in winter but I suspect these big panels do "something". That's also why I am considering recommissioning my HFL diesel 12v charging set.
If the lithium's can pull in power fast then it seems interesting given they it is rated to 90a output. In theory it would only take about an hour to replenish a 100ah lithium battery and that hour could be closely monitored so I could avoid the BMS wrecking the alternator regulator. Or set the regulator a bit lower so it does not hit the high voltage on the BMS in the first place.
The existing engines don't want messing with. they are incredibly well installed and very tidy. Leave alone.
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Sept 5, 2020 16:25:13 GMT
and that hour could be closely monitored so I could avoid the BMS wrecking the alternator regulator. Or set the regulator a bit lower so it does not hit the high voltage on the BMS in the first place. But isn't the nice part of a B2B charger that it isn't drawing power directly from the alternator and thus there is no additional stress on it? Although I suspect that the engine batt would need to be at or close to saturation before the B2B was properly up to speed. Since you spend more time stationary than not, maximising charging from the engine is secondary. I suppose. |
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Sept 5, 2020 17:08:01 GMT
and that hour could be closely monitored so I could avoid the BMS wrecking the alternator regulator. Or set the regulator a bit lower so it does not hit the high voltage on the BMS in the first place. But isn't the nice part of a B2B charger that it isn't drawing power directly from the alternator and thus there is no additional stress on it? Although I suspect that the engine batt would need to be at or close to saturation before the B2B was properly up to speed. Since you spend more time stationary than not, maximising charging from the engine is secondary. I suppose. I also like the idea of having at least two completely independent electrical systems in the boat which do not communicate with each other in any way. I could quite easily rig up a switch over device for the water pumps and have a separate set of lights. This particular boat is rather simple in domestic terms. No fridge or cool box, no telly no computer for a start. Just lights and USB sockets and 3 domestic water pumps and shower evac jabsco pump. That's it. There are of course the nav instruments but they will only be needed when engines are running anyway . |
|
|
|
Post by kris on Sept 5, 2020 17:13:30 GMT
Sounds like over complication to me.
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Sept 5, 2020 17:16:30 GMT
It would actually be very simple because there are so few appliances.
I've always been terrible with keeping batteries charged up. By having two separate systems I can do it properly and end up having even more flat batteries.
|
|
|
|
Post by kris on Sept 5, 2020 17:29:39 GMT
Surely just connect your mppt controller to your domestics and upgrade your charging systems on your engines. Then sort your hfl out as backup.
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Sept 5, 2020 17:40:08 GMT
Unless there is some technical reason why you can't have two charging sources going to the same battery bank (solar & b2b for example), surely having two separate battery banks is crazy.
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Sept 5, 2020 17:50:38 GMT
It's not crazy at all. If you are at sea (or Henley) in a force ten and the engine room explodes in a shower of sparks you lose all power. By having a nice little battery bank under the chart table you can still charge the phone and with a decent lithium bank you can also make the tea with the elecric kettle. The engine room explosion having taken out the gas systems. You have to have backups of backups and give yourself time to deal with catastrophic engine room explosions. Like having spare beer when you slip a disc. Which I didn't have... When you get to see the engine room on this boat you'll understand why it doesn't want to be rearranged. I've been going on about having two separate battery banks since I first joined canalworld in 2006. Everyone always thinks it's crazy but it isn't, honest  |
|
|
|
Post by JohnV on Sept 6, 2020 6:45:04 GMT
I've been going on about having two separate battery banks since I first joined canalworld in 2006. Everyone always thinks it's crazy but it isn't, honest Not everyone
My domestics are completely isolated from the engine bank as is the battery for one of the wing generators.
My domestics are charged by solar ( now with additional wind generator ) or if required from a 240v charger running on domestic inverter/generator/shore power as required
In the event of a total disaster type emergency, there is a set of jump leads hanging up in the engine room stores
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Sept 6, 2020 6:55:49 GMT
I'm talking about a secondary domestic electrical system with its own lights and either a two way switch for the water pump or another pump.
It's such a small boat with so few services on board it would be quite easy to double them all up and have two separate systems.
So if there is an extended period in winter when no boat movement happens you just turn off all the batteries in the engine room and run the system on the internally fitted lithium bank instead. Realistically most of the power would need to be generated by a combustion engine but there might be a little tiny bit from solar. It's possible.
|
|
