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Old 08-26-2017, 02:47 PM   #601
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I am not sure why Roadtrek doesn’t have a decent battery monitoring system, could be lack of engineering, or lack of financial justification or simply a desire to keep customer at an idiot light level marketing scheme as pointed earlier.

Having a simple shunt based Victron 700 for battery monitoring for each bank should give enough information to understand the system. https://www.amazon.com/Victron-BMV-7.../dp/B00MJ9TAN8.

I am sure it is possible to design a simple system with one-meter monitoring 3 shunts. We are, as far as I know, in the 21 Century.
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Old 08-26-2017, 03:00 PM   #602
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I am not sure why Roadtrek doesn’t have a decent battery monitoring system, could be lack of engineering, or lack of financial justification or simply a desire to keep customer at an idiot light level marketing scheme as pointed earlier.

Having a simple shunt based Victron 700 for battery monitoring for each bank should give enough information to understand the system. https://www.amazon.com/Victron-BMV-7.../dp/B00MJ9TAN8.

I am sure it is possible to design a simple system with one-meter monitoring 3 shunts. We are, as far as I know, in the 21 Century.

yes -but then an owner would know how much power a battery just being on was taking. Ignorance is bliss
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Old 08-26-2017, 03:13 PM   #603
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WingedRyno would have no idea of what the remaining battery capacity is in his RV. There could be 120ah or 920ah remaining but there is no way for him to know for sure. It appears to be a challenge to even know if the batteries are charging.

Davydd mentioned the possibility of a new division at Advanced RV customizing other brand RVs - http://www.classbforum.com/forums/f7...html#post61480 - WingedRyno should try to get the first appointment and get a good battery monitoring system installed.
Advanced RV is thinking of parlaying their trained and certified installations of levelers and VB Air Suspension to others. They done some custom alterations of cabinets for other vans as well. They are considering hydro-graphics as well since they make extensive use of it on their Bs like matching dashboard components with the cabinets. That's the surface and easy stuff.

But I don't think they are contemplating fixing Roadtrek's batteries or even attempting it. Essentially I think they would have to rip out the whole installation and start over. Their Silverleaf system is integrated with every supplier of components with their custom software. They have a warp core Roadtrek taken as a trade-in and have it for sale and in the mean time I think it is part of their rental fleet. I think they've looked at it but I don't think they've torn into it find out how it works (or not). What I can glean from them is they are "mystified."
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Old 08-26-2017, 03:30 PM   #604
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When I fully charge the batteries with shore power they show 14.1 volts or so, and when shore power is removed they go down to about 13.6-13.8 volts.

So I think I have some idea of battery capacity at 13.1. I know that it's not full. I think it's safe to assume that.

I'll test it out in the next few days and see if the issue was not the GU but rather was the balmar thinking that 13.1 was not low enough to charge the battery. There is a strong possibility that is the issue.

I've loved these ecoktreks so far. They're awesome. Plenty of juice and not knowing state of charge hasn't been an issue for me whatsoever. Others may have differing opinions, but I'm loving this RoadTrek so far!
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Old 08-26-2017, 03:37 PM   #605
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I don't really see why you couldn't install a Victron battery monitor. It's just a shunt and the display module. It wouldn't control anything, but it would tell you where you are SOC wise. If you can't find a main negative lead, you could simply install one on each battery module.
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Old 08-26-2017, 03:40 PM   #606
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Advanced RV is thinking of parlaying their trained and certified installations of levelers and VB Air Suspension to others. They done some custom alterations of cabinets for other vans as well. They are considering hydro-graphics as well since they make extensive use of it on their Bs like matching dashboard components with the cabinets. That's the surface and easy stuff.

But I don't think they are contemplating fixing Roadtrek's batteries or even attempting it. Essentially I think they would have to rip out the whole installation and start over. Their Silverleaf system is integrated with every supplier of components with their custom software. They have a warp core Roadtrek taken as a trade-in and have it for sale and in the mean time I think it is part of their rental fleet. I think they've looked at it but I don't think they've torn into it find out how it works (or not). What I can glean from them is they are "mystified."
How deep is their que these days? They seem to be getting into a lot of other things when they have a significant backlog to service.
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Old 08-26-2017, 04:07 PM   #607
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How deep is their que these days? They seem to be getting into a lot of other things when they have a significant backlog to service.
I should say they are contemplating for future purposes they will announce soon. TheFitRV was a one off which evidently benefitted TheFitRV as well as Advanced RV publicity wise. TheFitRV has a longtime association with Advanced RV in that they conducted fitness seminars at past Advanced Fest.

When I was there last week they were at capacity in their existing shop in that every bay and aisle space had Bs under work and that is their bottleneck, that and balanced capacity of their work force, I think.

I was invited there for a charette meeting along with three other past customer to offer insight to their plans. I took advantage of it because I had some nagging issues I wanted to take care of before our next trip, an excuse for a breaded pork tenderloin tour (five of them), and my wife abandoning me for the week to go with our daughter and granddaughter on a trip to the Black Hills and Devil's Tower. The trip was while the height of the Sturgis motorcycle rally was going on and our daughter had longtime reservations for a hotel room and our son-in-law took a new job in the meantime and couldn't go. It just worked out.
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Old 08-26-2017, 06:17 PM   #608
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The is a good possibility that the reason we haven't seen anyone successfully put a battery monitoring system on the Ecotrek modules is the nature of the parasitic losses. If they are internal to the BMS and relays, that power would never show up on either the positive or negative cables. Without allowing for the parasitic, you state of charge would be nearly uselessly inaccurate. I think the meter would have to be altered to be able to subtract whatever the parasitic if found to be continuously whenever the module is on. Current meters can do that, but not at the large losses of the Ecotreks. Most will let you set the % loss per month, usually in the .5 to 10% per month range. On the charging side they could likely be quite accurate if done just like with other batteries, determine full from voltage and current, and then reset the meter to 100% when the charger goes off.
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Old 08-26-2017, 06:55 PM   #609
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I don’t know if it is possible on the Roadtrek systems to place a shunt between the battery plus or minus and wiring but on system like the Victron I think it could be possible. If placing a shunt on the positive post is easier than I believe that the new Blue Sea monitor can be adapted to this type of wiring with the disadvantage of lower accuracy at 4% versus 1% on the negative side. https://www.bluesea.com/products/1830/M2_DC_SoC_Monitor
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File Type: png Basic-wiring-BMS.png (171.3 KB, 11 views)
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Old 08-26-2017, 11:17 PM   #610
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If the BMS is outboard of the batteries as shown in the above diagram, then installing the shunt is not all that difficult - just place it ahead of those leads to the BMS.
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