Iím on a long trio right now (12 hrs of driving ) would that do the same thing? Itís even at 12.96 while I drive. When I do shore power charge I have inverter on correct ? Any other hints would be well appreciated. Again thanks for the suggestion.
Originally Posted by markopolo
400Ah of lithium batteries (2 ecotrek modules) should last several days if not using the air conditioner.
If accurate, the 12.98v you measured indicates a very low state of charge (SOC) of approximately 20%. The voltstart would start often.
I suggest plugging the van into shore power (grid power) for 12 hours or even overnight to see if the modules will charge to a higher SOC. That length of time is likely needed because the charger in your van is almost certainly not high amp output. It might only output 30A or 40A.
While charging you should expect to see voltage rising to over 14V and likely reaching 14.4V. Don't terminate the charging too soon. Lithium batteries don't need a long absorption time but packs are often designed with cell balancing occurring at absorption type voltages. After charging to a near full state you should expect to see a resting voltage (off charger) of more than 13.4V.