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Post by Deleted on Oct 2, 2021 14:38:50 GMT
I'm in lithium debit for around £1200 so far. That's 7 X 20ah mastervolt lifepo4 blocks which make up two separate 60ah 12v banks and a spare for portable use, a slightly odd LTO module which does something and two ebike batteries to run the floating electric beer drinking platform.
They are good and do change the whole situation but it will take a while to pay back compared with bag it and bin it SLA batteries.
One thing I like is the lithium is easy to manage without slipping a disc.
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Post by Deleted on Oct 6, 2021 16:18:23 GMT
I don't have a victron, I have a xantrex battery monitor, but manged to wire the relay output from that to operate the motorised switch ok, or so I thought anyway. Perhaps I didn't. You can use the Xantrex to operate a BGB-250 if you like. The Xantrex is quite similar to the BMV712, but the latter is better IMO because it uses much less current and has a changeover relay rather than just a NO relay. But fortunately, the NO function of the Xantrex is what you need to operate the BGB-250 since the latter requires a wire to be pulled down to 0v to switch it off. As I recall the BGB-250 manufacturer was concerned about the surge current on switch-on taken by an inverter’s large input capacitors. At a pinch one could disconnect the inverter eg at the fuse, then after turning the BGB back on again, charge up the capacitors relatively slowly (ie in a couple of seconds) by putting a low value resistance across the fuse, then reinstate the fuse. Obviously this hasn’t been a problem for Kris but it might depend on the model of inverter fitted. Ok, so I may have discovered what is potentially a mistake in my setup. Could I PM you please Nick?
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Post by kris on Oct 6, 2021 16:25:09 GMT
You can use the Xantrex to operate a BGB-250 if you like. The Xantrex is quite similar to the BMV712, but the latter is better IMO because it uses much less current and has a changeover relay rather than just a NO relay. But fortunately, the NO function of the Xantrex is what you need to operate the BGB-250 since the latter requires a wire to be pulled down to 0v to switch it off. As I recall the BGB-250 manufacturer was concerned about the surge current on switch-on taken by an inverter’s large input capacitors. At a pinch one could disconnect the inverter eg at the fuse, then after turning the BGB back on again, charge up the capacitors relatively slowly (ie in a couple of seconds) by putting a low value resistance across the fuse, then reinstate the fuse. Obviously this hasn’t been a problem for Kris but it might depend on the model of inverter fitted. Ok, so I may have discovered what is potentially a mistake in my setup. Could I PM you please Nick? You can share with all of us, promise not to laugh 😆
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Post by Deleted on Oct 6, 2021 16:36:30 GMT
Ok, so I may have discovered what is potentially a mistake in my setup. Could I PM you please Nick? You can share with all of us, promise not to laugh 😆 Promise? Really. Ok then.............
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Post by Deleted on Oct 6, 2021 16:39:45 GMT
....On second thoughts, I think I will keep my embarrassing mistakes to the confessional of the PM (If Nick is gracious enough to accommodate me).
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Post by thebfg on Oct 6, 2021 16:48:52 GMT
Spoil sport.
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Post by Deleted on Oct 6, 2021 17:08:23 GMT
....On second thoughts, I think I will keep my embarrassing mistakes to the confessional of the PM (If Nick is gracious enough to accommodate me). He will. Yeah, but will he blab my dirty secret?
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Post by JohnV on Oct 6, 2021 17:11:17 GMT
Yeah, but will he blab my dirty secret? No. not even a teensy weensy little hint ?
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Post by Telemachus on Oct 6, 2021 19:02:28 GMT
No PM received yet but feel free if you wish.
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Post by Deleted on Oct 6, 2021 19:17:46 GMT
PM sent. Thank you
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Post by Telemachus on Oct 6, 2021 20:02:06 GMT
PM replied to.
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Post by Jim on Oct 7, 2021 14:12:24 GMT
How can we avoid the same mistake if we don't know what it is?
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Post by Deleted on Oct 7, 2021 14:23:50 GMT
How can we avoid the same mistake if we don't know what it is? By not buying Lithium batteries unless you have a brain the size of a planet.
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Post by Jim on Oct 7, 2021 14:26:08 GMT
How can we avoid the same mistake if we don't know what it is? By not buying Lithium batteries unless you have a brain the size of a planet. ooh! Potential costly mistake then.
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Post by Deleted on Oct 7, 2021 14:27:55 GMT
How can we avoid the same mistake if we don't know what it is? By not buying Lithium batteries unless you have a brain the size of a planet. Isn't that a 'running joke' of the type we're no longer allowed to use as it provokes, goads and bullies the victims, in this case Telemachus ? Rog
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