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Old 09-04-2019, 07:31 AM   #85
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Newmar Owners Club
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I bought the BT clamp (thank you Charlie) and did some testing on my last trip. Before I installed the new BIM I recorded 30a to 35a at the alternator, 5 different times. After installing the new BIM I saw about 85a at the alternator with a spike of 115a that didn't show on the graph. This was with one air running off the batteries. After 4 different tests 86a max except the one spike. After I finish the last 6 panels this week I'm hoping for even less alternator output. I will install a latching relay on the boost switch to keep the alternator connected when needed. LED showing if it's on or not. I wanted to keep the lighted boost switch so this was the best option, and cheaper. I will be leaving for the balloon festival end of the month and will see what all the solar does.
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Old 09-04-2019, 08:04 AM   #86
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Originally Posted by 10 fan View Post
I bought the BT clamp (thank you Charlie) and did some testing on my last trip. Before I installed the new BIM I recorded 30a to 35a at the alternator, 5 different times. After installing the new BIM I saw about 85a at the alternator with a spike of 115a that didn't show on the graph. This was with one air running off the batteries. After 4 different tests 86a max except the one spike. After I finish the last 6 panels this week I'm hoping for even less alternator output. I will install a latching relay on the boost switch to keep the alternator connected when needed. LED showing if it's on or not. I wanted to keep the lighted boost switch so this was the best option, and cheaper. I will be leaving for the balloon festival end of the month and will see what all the solar does.
That is more what I expected to see. That's brilliant. Your's is nicely balanced...way way within good working parameters. I suppose the LiFePO4 voltage differential is slowing the AMP draw from the alternator. Not as lucky with our Flooded Lead Acid.

It would be nice to somehow rig the relay to close when a parameter such as SOC or amp draw are met....to automate the process while running an A/C. Otherwise the normal Li-225 would probably be fine.
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Old 09-04-2019, 10:53 PM   #87
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If I knew the new BIM was timed 15 min on and 20 min off I would not have bought it. I could of put a latching relay on the original one and saved the money. I guess it's part of the learning experience. Automated would be nice but don't think I can figure that one out.
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Old 09-05-2019, 12:12 PM   #88
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Reactor aside, I can't believe Newmar (maybe many others) has 15' of cable connected directly to many batteries with no protection. Not a safe install.

It is cheaper for Newmar to build it that way.

The truth remains: If you want the job done well you have to do it yourself. You have the incentive the hired person lacks, you have to live with the consequences good or bad.

If you don't want to build it at least read the installation manuals and design it, then hire someone to build it while you supervise the work.
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