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Post by kris on Jan 1, 2021 14:28:15 GMT
So I’ve finally got around to thinking about wiring up my batteries I’ll attach a photo of a drawing of what I think it should be. Any help would be appreciated. I’m trying to remember the image hosting I use so I can upload a photo, it might take some time.
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Post by patty on Jan 1, 2021 15:16:12 GMT
So I’ve finally got around to thinking about wiring up my batteries I’ll attach a photo of a drawing of what I think it should be. Any help would be appreciated. I’m trying to remember the image hosting I use so I can upload a photo, it might take some time. I use Imgur....
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Post by kris on Jan 1, 2021 15:51:42 GMT
I’ve rembered my immage hosting site. So here’s the image
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Post by Telemachus on Jan 1, 2021 16:43:09 GMT
Yea looks about right. Are you planning to charge the batteries just with the charger, and discharge just with the inverter? Just sayin there’s no alternator and no dc boat services in there.
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Post by kris on Jan 2, 2021 8:47:41 GMT
I’ll sort the alternators out later and dc services are pretty easy. I’m not completely sure where the solar mppt should be connected.
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Post by Telemachus on Jan 2, 2021 10:06:23 GMT
I’ll sort the alternators out later and dc services are pretty easy. I’m not completely sure where the solar mppt should be connected. If you connect the solar to the battery side of the switches you would need to be confident that it’s set up correctly so as not to risk overcharging the batteries. You would have no protection against an MPPT fault causing over-voltage. If you connect the solar to the services side then it means that if the automatic or manual switches are opened, you disconnect the MPPT from the batteries and for some devices, this will damage the MPPT. Best to check the MPPT manual to see what it has to say about disconnecting from batteries whilst the panels are still connected.
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Deleted
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Post by Deleted on Jan 2, 2021 10:10:58 GMT
That's quite an alarming thought.
MPPT device failure causing 36v/80v to be directed to the battery?
My experience of lithium battery overvolting with the jump pack tells me this would be a very bad outcome. Not just wrecked batteries. Having said that LFP is safer than some others so maybe it would be ok.
I think on the victrons this is looked after by the infernal fuse.
One of my victrons has 72v input the other one has 36v.
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Post by kris on Jan 2, 2021 10:30:03 GMT
I’ll sort the alternators out later and dc services are pretty easy. I’m not completely sure where the solar mppt should be connected. If you connect the solar to the battery side of the switches you would need to be confident that it’s set up correctly so as not to risk overcharging the batteries. You would have no protection against an MPPT fault causing over-voltage. If you connect the solar to the services side then it means that if the automatic or manual switches are opened, you disconnect the MPPT from the batteries and for some devices, this will damage the MPPT. Best to check the MPPT manual to see what it has to say about disconnecting from batteries whilst the panels are still connected. I’ve got a Tristar mppt which I’m pretty confident will be set up correctly. I’m thinking of positive from mppt on its own fused battery connection. It’s never good to disconnect your mppt from the batteries whilst it’s getting current from solar. I think the tristar is protected but I still wouldn’t want to risk it. The negative from the mppt would go through the shunt.
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Post by Telemachus on Jan 2, 2021 10:32:11 GMT
If you connect the solar to the battery side of the switches you would need to be confident that it’s set up correctly so as not to risk overcharging the batteries. You would have no protection against an MPPT fault causing over-voltage. If you connect the solar to the services side then it means that if the automatic or manual switches are opened, you disconnect the MPPT from the batteries and for some devices, this will damage the MPPT. Best to check the MPPT manual to see what it has to say about disconnecting from batteries whilst the panels are still connected. I’ve got a Tristar mppt which I’m pretty confident will be set up correctly. I’m thinking of positive from mppt on its own fused battery connection. It’s never good to disconnect your mppt from the batteries whilst it’s getting current from solar. I think the tristar is protected but I still wouldn’t want to risk it. The negative from the mppt would go through the shunt. Sounds reasonable.
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Post by kris on Jan 2, 2021 10:41:11 GMT
I’m think I’m getting somewhere with the theory. The practical is the problem the workshop is freezing. Oh well I can look into programming the bmv. I’m not impressed with the connections on the bmv.
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Post by Telemachus on Jan 2, 2021 11:08:17 GMT
I’m think I’m getting somewhere with the theory. The practical is the problem the workshop is freezing. Oh well I can look into programming the bmv. I’m not impressed with the connections on the bmv. What’s wrong with the connections on the BMV? I suppose the spring loaded things are quite small, but then you only need thin wires.
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Post by kris on Jan 2, 2021 13:31:38 GMT
I’m think I’m getting somewhere with the theory. The practical is the problem the workshop is freezing. Oh well I can look into programming the bmv. I’m not impressed with the connections on the bmv. What’s wrong with the connections on the BMV? I suppose the spring loaded things are quite small, but then you only need thin wires. Just very small I’m a bit more of a heavy duty person.
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Deleted
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Post by Deleted on Jan 2, 2021 14:25:02 GMT
I found that using bootlace ferrules was necessary in my Victron MPPT connections for them to be secure.
I agree the connector blocks are not of the first water. Definitely let the product down somewhat but then it's not a top price item so not surprising.
Premium product but not the best.
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Post by kris on Jan 2, 2021 14:36:01 GMT
I found that using bootlace ferrules was necessary in my Victron MPPT connections for them to be secure. I agree the connector blocks are not of the first water. Definitely let the product down somewhat but then it's not a top price item so not surprising. Premium product but not the best. I don’t know it’s not that cheap a product. I’ll sort out a connection but they are a bit pants on the bmv. But if it does the job I’ll be happy.
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Post by peterboat on Jan 4, 2021 9:32:24 GMT
I found that using bootlace ferrules was necessary in my Victron MPPT connections for them to be secure. I agree the connector blocks are not of the first water. Definitely let the product down somewhat but then it's not a top price item so not surprising. Premium product but not the best. I don’t know it’s not that cheap a product. I’ll sort out a connection but they are a bit pants on the bmv. But if it does the job I’ll be happy. Midnite classic for me, I have to of them whilst expensive they are good, a lightning strike damaged one of mine and it was repaired under warranty I have since installed protection for them. The standard warranty is 5 years and they are easy to setup and the voltages you put in are what you see at the batteries
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