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Post by thebfg on Feb 23, 2021 19:46:45 GMT
SO much room ... you could fit a disco globe in there. Rog I've got one if he wants it.
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Post by metanoia on Feb 23, 2021 19:50:43 GMT
SO much room ... you could fit a disco globe in there. Rog I've got one if he wants it. Yeah, but - you've got a new shed too - don't go giving too much away!
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Post by kris on Feb 24, 2021 9:23:32 GMT
Looks like you've got plenty of juice there Kris. How much capacity is there in total? sorry I’ve just seen your question, 1040 amp/hr at 12v. Must just keep working through the wiring up more photos later maybe?
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Post by Telemachus on Feb 24, 2021 9:25:59 GMT
Looks like you've got plenty of juice there Kris. How much capacity is there in total? sorry I’ve just seen your question, 1040 amp/hr at 12v. Must just keep working through the wiring up more photos later maybe? Blimey I thought I had a lot at 600Ah!
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Post by kris on Feb 24, 2021 9:30:47 GMT
sorry I’ve just seen your question, 1040 amp/hr at 12v. Must just keep working through the wiring up more photos later maybe? Blimey I thought I had a lot at 600Ah! I’d like to get into electric cooking, these induction hobs are supposed to be good. Once I’ve got 2.4 kw of solar then I’ll need them.
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Post by kris on Feb 24, 2021 14:45:08 GMT
This is where I’ve got to today, this is definitely something very close to the final layout. For nicks benefit nothing is connected yet,I think tmw is d-day.
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Post by kris on Feb 24, 2021 15:58:32 GMT
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Post by kris on Feb 24, 2021 16:09:19 GMT
This is where I’m at
The manual of the BGB250 looks different connection-wise from your photo, but anyway you need to have the BMV connected to the “remote” terminal of the BGB to pull it to 0v to switch off. So wire from 0v to BMV “com” terminal, wire from BMV “NO” terminal to BGB “remote” terminal. And then of course programme the BMV relay to operate at your selected upper and lower voltage limits.
Just sorting the bits I need from other threads.
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Post by Telemachus on Feb 24, 2021 18:11:51 GMT
As a starting point set Peukert (item 5) to 1.05 and the charge efficiency (item 6) to 99%. Plus of course set the battery capacity (item 1). You will also need to set up the fully charged detection (items 2,3 and 4) so that the meter synchronises to 100% when fully charged. To give advice on how to set that up, you’d need to remind me how you are planning to charge them. Then there is the relay to set up. If you want to operate the relay on low voltage, items 18 and 19 maybe to 12v and 12.5v (or lower, if you like) and for high voltage it’s 20 and 21, maybe 14.6 and 14.1 or whatever you want to risk. And I would put in a significant delay time in 14 to stop relay chatter, maybe 30 seconds. Oh and best to connect the power wire for the BMV to the battery side of the relay, otherwise SoC will be lost, and reset to 100%, when the power fails and is restored.
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Post by kris on Feb 25, 2021 15:31:42 GMT
A question for nick so the bmv no goes to remote on Bgb. But where does the com from the bmv go on the bgb?
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Post by kris on Feb 25, 2021 16:27:00 GMT
So I’m am stuck I don’t no how to wire the bgb so far I’ve got No connnector on the bmv going to remote on bgb. So I can’t work out where the com from the bmv goes.
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Post by Telemachus on Feb 25, 2021 16:49:25 GMT
So I’m am stuck I don’t no how to wire the bgb so far I’ve got No connnector on the bmv going to remote on bgb. So I can’t work out where the com from the bmv goes. I think you are entitled to be confused! You are using the BMV as a substitute for the remote switch shown on the diagram. HOWEVER in the diagram it is shown connected to battery positive, whereas in the text it is connected to battery negative. I found another instruction sheet for a slightly different variant of the BGB250 which shows in both the diagram, and the text, the other side of the switch being connected to battery negative. So in summary, connect the BMV com to battey negative.
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Post by kris on Feb 25, 2021 16:57:09 GMT
So just to be clear BMV com connects to battery negative . Bmv no connects to bgb remote.
Sorry to be a pain
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Post by Telemachus on Feb 25, 2021 17:00:20 GMT
So just to be clear BMV com connects to battery negative . Bmv no connects to bgb remote. Sorry to be a pain Correct.
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Post by Jim on Feb 25, 2021 17:05:49 GMT
Blimey I thought I had a lot at 600Ah! I’d like to get into electric cooking, these induction hobs are supposed to be good. Once I’ve got 2.4 kw of solar then I’ll need them. Just got an induction hob, to complement the air source heat pump coming next week. Turn the gas off completely. Max power is 7kwh, got to be wired into the 32a cooker supply. Some of the rings have a boost function. But, while looking around I did see some 13a 2 ring ones.
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