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Search took 0.01 seconds. Search: Posts Made By: gregmchugh
Forum: General Discussion Forum 08-12-2016, 11:16 PM
Replies: 332
Views: 58,797
Posted By gregmchugh
They also need to set the trigger voltage high...

They also need to set the trigger voltage high enough to avoid the inverter low battery voltage shutdown under heavy loads. I think a manual reset is needed on the inverter they use after a low...
Forum: General Discussion Forum 08-12-2016, 11:12 PM
Replies: 332
Views: 58,797
Posted By gregmchugh
Not hard to put a shunt in each module to measure...

Not hard to put a shunt in each module to measure the current but you also need a centrallized system to collect the info from each module and display the info. If an Ecotrek module is offline it may...
Forum: General Discussion Forum 08-12-2016, 11:04 PM
Replies: 332
Views: 58,797
Posted By gregmchugh
Another possibility is that they shortened the...

Another possibility is that they shortened the AGM warranty to 1 year as an added incentive to get Ecotreks with a 6 year warranty.

The build your own options on the Roadtrek website have...
Forum: General Discussion Forum 08-12-2016, 10:32 PM
Replies: 332
Views: 58,797
Posted By gregmchugh
Yes, you can get Voltstart with AGM batteries... ...

Yes, you can get Voltstart with AGM batteries...

I have a pretty good understanding of my typical AH usage and a battery meter so I am not worried about accidentally discharging my AGM batteries...
Forum: General Discussion Forum 08-12-2016, 09:51 PM
Replies: 332
Views: 58,797
Posted By gregmchugh
I am never shocked to find some manufacturer has...

I am never shocked to find some manufacturer has reduced the performance of their products by reducing the cost of production, that is the way it goes and customers seem to go for cheap as opposed to...
Forum: General Discussion Forum 08-12-2016, 09:32 PM
Replies: 332
Views: 58,797
Posted By gregmchugh
I have no doubt that lithium or whatever will...

I have no doubt that lithium or whatever will replace AGM batteries in RVs and remove the downsides of lead acid batteries: weight, volume, long absorption charge times, etc.

No reason not to...
Forum: General Discussion Forum 08-12-2016, 09:24 PM
Replies: 332
Views: 58,797
Posted By gregmchugh
The 50% number is clearly safe but why is it 50%...

The 50% number is clearly safe but why is it 50% instead of 40% or 60% or other discharge limits that seem just as reasonable based on real data and not anecdotal evidence. If other manufacturers...
Forum: General Discussion Forum 08-12-2016, 08:54 PM
Replies: 332
Views: 58,797
Posted By gregmchugh
As has been noted before, it will take more than...

As has been noted before, it will take more than data to change the minds of many of the believers in the 50% hard limit for discharging AGM batteries... :)
Forum: General Discussion Forum 08-12-2016, 08:47 PM
Replies: 332
Views: 58,797
Posted By gregmchugh
I surmise you are trying to make some point here...

I surmise you are trying to make some point here about the danger of relying on manual intervention to prevent draining of AGMs below 20% charge when lithium BMS controllers handle this...
Forum: General Discussion Forum 08-12-2016, 05:38 PM
Replies: 332
Views: 58,797
Posted By gregmchugh
I will not own this van long enough to even...

I will not own this van long enough to even consider the cost of lithium or to get the benefit of the life cycles they may have.

Option 1, draw the AGMs beyond 50%, cost $700 for two new...
Forum: General Discussion Forum 08-12-2016, 05:09 PM
Replies: 332
Views: 58,797
Posted By gregmchugh
I have 220 AH AGMs under the hood on my Sprinter...

I have 220 AH AGMs under the hood on my Sprinter and if I need an average of more than 110 AH per day but less than 176 AH it makes complete sense to simply draw the batteries beyond 50% and replace...
Forum: General Discussion Forum 08-03-2016, 06:48 AM
Replies: 332
Views: 58,797
Posted By gregmchugh
From the owners point of view are there any...

From the owners point of view are there any significant differences between the two architectures?

Assuming the design issues of the current Roadtrek system are fixed and ARV found that buyers...
Forum: General Discussion Forum 08-03-2016, 01:29 AM
Replies: 332
Views: 58,797
Posted By gregmchugh
Not easy to get accurate state of charge with the...

Not easy to get accurate state of charge with the RT system but not impossible. Shunt in each Ecotrek module with network communication to a central display system. Fix the power drain problem and...
Forum: General Discussion Forum 08-03-2016, 12:23 AM
Replies: 332
Views: 58,797
Posted By gregmchugh
I don't see any significant differences in the...

I don't see any significant differences in the two approaches from a battery management point of view, given a good low power design for either approach it seems to be 6 of one, half dozen of the...
Forum: General Discussion Forum 08-01-2016, 09:19 PM
Replies: 332
Views: 58,797
Posted By gregmchugh
I don't recall anyone saying that a central BMS...

I don't recall anyone saying that a central BMS would not work well just that it does not fit into Roadtrek's decision on the system architecture using modular components...
Forum: General Discussion Forum 08-01-2016, 04:01 AM
Replies: 332
Views: 58,797
Posted By gregmchugh
I deleted it, just continue with the regularly...

I deleted it, just continue with the regularly scheduled programming... :)
Forum: General Discussion Forum 08-01-2016, 02:01 AM
Replies: 332
Views: 58,797
Posted By gregmchugh
Silverleaf does not make the BMS portion of the...

Silverleaf does not make the BMS portion of the system, Elite Power Systems does the BMS.

I guess you would have to ask Roadtrek why they did what they did...

No one here can do anything but...
Forum: General Discussion Forum 08-01-2016, 01:24 AM
Replies: 332
Views: 58,797
Posted By gregmchugh
In many cases I expect that the power draw of the...

In many cases I expect that the power draw of the BMS may not be included in the reported charge/load amps data shown by a display derived from the shunt on the battery bank since the connections are...
Forum: General Discussion Forum 07-31-2016, 10:30 PM
Replies: 332
Views: 58,797
Posted By gregmchugh
There is a "parasitic drain" due to the battery...

There is a "parasitic drain" due to the battery management system on any lithium battery system but most have a drain that is not significant relative to the usable amp hours from the battery bank.
Forum: General Discussion Forum 07-31-2016, 08:52 PM
Replies: 332
Views: 58,797
Posted By gregmchugh
If these forums are so useless, I guess I wonder...

If these forums are so useless, I guess I wonder why you would be wasting your time participating??

If Roadtrek has the goal of spreading misinformation then I guess we can assume that their...
Forum: General Discussion Forum 07-25-2016, 03:03 AM
Replies: 332
Views: 58,797
Posted By gregmchugh
I never suggested they weren't planning to come...

I never suggested they weren't planning to come up with a redesign to resolve the current issues, I sure hope they are tasking some talented engineers to get a redesign done and also hope that they...
Forum: General Discussion Forum 07-24-2016, 11:58 PM
Replies: 332
Views: 58,797
Posted By gregmchugh
Sorry to put a damper on your vision but a 1600...

Sorry to put a damper on your vision but a 1600 amp hour Ecotrek system has 8*35 watts of parasitic loads in the 8 battery modules so it needs about 2000 watts of solar panels just to restore the...
Forum: General Discussion Forum 07-24-2016, 09:46 PM
Replies: 332
Views: 58,797
Posted By gregmchugh
Wow, I wouldn't know where to start responding to...

Wow, I wouldn't know where to start responding to that so I will just let it sit...
Forum: General Discussion Forum 07-24-2016, 04:40 PM
Replies: 332
Views: 58,797
Posted By gregmchugh
Why on earth would I spend money on a new van...

Why on earth would I spend money on a new van that would be no more useful to me than the 10 year old one I already have have? :)

I have wondered why it seems to disturb you so much that some...
Forum: General Discussion Forum 07-24-2016, 02:55 PM
Replies: 332
Views: 58,797
Posted By gregmchugh
I think there are a lot of variables in that...

I think there are a lot of variables in that method including the efficiency of the charger, say it ends up with a steady state power draw of 50 watts on the Kill-A-Watt meter on the shore power...
Showing results 1 to 25 of 71
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