Ive been using one for about 6 months - seems great so far, but I'm trying to figure out exactly how to program it to reflect the proper charging
efficiencies for my lifeline AGM
Its essential to know how many amps you are drawing and your remaining capacity - though no mater what, these are somewhat of a moving target due to basic battery chemistry, which states that the faster you take energy out, the less energy you get - the slower, the better - which is a function of overall bank capacity, but also depends on silly things like internal resistance and external wiring
I have a similar monitor on my solar
array, so I know how much its cumulatively throwing at the battery bank, but how much is getting banked is another issue.
One of the many things that justified the expense of the AGMs was thier inherent high charge acceptance rate and low internal resistance, which leads to a 15% (or so) improvement over flooded wet cells.
This is tantamount to having bigger bank or array - but to quantify this, you need a monitor of some sort.
BSSs VSM fit the bill, since it was inexpensive, and consolidates a variety of electrical
and mechanical systems info into one unit,
My only gripe is that the display can be difficult to read from certain angles, and the user's manual, while adequit is lacking in some important technical information -
Like "What is the typical charge effciency for AGM
"What is the difference between "Starved Electrolite" and "Standard" AGMs?
I may have to call thier tech support.