lw395
Well-Known Member
Interesting.
First link is suggesting something like 25p per kwh as the cost of cycling the battery.
That seems much worse than a typical BEV battery?
Cheaper LiFePO4 batteries
- Thread starter Boo2
- Start date
First link is suggesting something like 25p per kwh as the cost of cycling the battery.
That seems much worse than a typical BEV battery?
Poey50
Well-Known Member
That's useful, thanks.
This canal boaters' UK-based forum also has some interesting stuff.
Cheap LiFePO4 BMS?
This canal boaters' UK-based forum also has some interesting stuff.
Cheap LiFePO4 BMS?
Red Panda
Well-Known Member
I'd suggested the Transporter batteries to a friend who's doing a big battery upgrade. His engineer has instead recommended the Winston cells, along with a Victron BMS, giving more flexibility in how the batteries are configured and allowing him to control the spec of the internal wiring.
Poey50
Well-Known Member
I thought that Victron BMS could only be used with Victron batteries, no?
Edit. See ... Winston LiFeYPO4 - Victron VE.Bus BMS - Victron Energy
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Poey50
Well-Known Member
Chartplotter out of the ark and lead acid batteries knackered? `Not short of a bob or two? Then there's this ...
ryanroberts
Well-Known Member
Raymarine's 'OS' looks suspiciously like embedded Android. Anyone know what it's based on?
Boo2
Well-Known Member
ryanroberts
Well-Known Member
Nothing says safety critical like an AOSP based platform, I think I'll be avoiding that after working with it for a few years..
laika
Well-Known Member
Are you sure? It was a pretty straightforward Linux last time I looked although that was about 6 years ago so things may have changed
At the time, I dissected it and pointed out a few areas where they were pretty heavily stepping away from security best practice. Got no response from repeated efforts to contact someone relevant in Raymarine. Ended up posting a blog article which got posted to their facebook page where they pooh-poohed the relevance of security because their chartplotters would never be connected to the Interweb. Because those devices would never connect to the Internet, right?
Boo2
Well-Known Member
Yes, as I understand it the new Lighthouse 3 systems (Axiom chartplotters etc) are based on Android but the previous Lighthouse 2 based systems (e7 mfds etc) are based on another version of Linux. Don't know what GUI library the L2 systems use (maybe OpenGL ?) but moving to Android will save them a huge amount of work in the longterm , I bet.
Boo2
ryanroberts
Well-Known Member
AOSP is a sensible economic choice if you are building a touch device, lots of cheap chipset support and reference boards from MediaTek etc. Probably a lot more effort than pulling off similar with QT and you get a much larger pool of developers for the UI work. Made a similar choice, but this was for home automation where 2-3 minute boot times and a giant pile of sort of java nobody really understands in full etc are less serious.
laika
Well-Known Member
Thanks: Interesting. Yes it would have been an earlier version I unpacked from an update. I confess to being ignorant about the advantages of embedded android in this sort of space . Probably a long discussion and off-topic for this thread.
Poey50
Well-Known Member
Quality battery management systems (BMSs) with good functionality (including low-temperature disconnect, and customisable adjustment via Bluetooth)) seem to be dropping fast in price. I think affordable LFP DIY systems may come faster than we think. This guy is certainly helping to drive things along.
Next step is a set of muppet-proof DIY marine installation blue-prints.
Next step is a set of muppet-proof DIY marine installation blue-prints.