Not a TriMetric, but for $20 might be worth trying out...
Bayite DC 6.5V-100V Digital ammeter voltmeter Amazon suggested this for me and I'm thinking for $20 I might just give it a try. Has very good reviews too.
Forum Discussion
Both of the last two posts indicate that AGMs do need an "overcharge" every so often. Been a lot of threads about that arguing if true or not, depending on the brand or type of AGM etc etc. Maybe time for another go round on that topic in a new thread with this latest actual measured evidence.
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Even the Trimetric AH counter gets out of whack between its AH counter and the SOC of the batts. It has a way to adjust the default heat loss allowance during a recharge to make resets needed less often, but it is still going to get off track. Outside temps keep changing and battery capacity keeps changing with age.
While on solar with the batts getting full every day, I reset the Trimettic AH counter every evening when it gets dark--by then the counter is well above zero into positive numbers.
I have checked and when the AH counter is above about plus 15, the SG is at baseline which is True Full. So I could adjust for that. But that amount above zero is a variable for complete accuracy. Don't need that much accuracy while camping. Everything is a variable. Every day is different for how much sun how much battery usage.
The way to tell you are really "full" with flooded batts is with an hydrometer. AGMs require more indirect evidence that most RVers probably aren't much "into" gathering. Still, the AGMs do have many advantages. In winter I would keep mine inside the RV where it is warm in cold weather to keep their capacity up. (Ignoring any risk of them venting) Can't do that with Wets (fumes)
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Even the Trimetric AH counter gets out of whack between its AH counter and the SOC of the batts. It has a way to adjust the default heat loss allowance during a recharge to make resets needed less often, but it is still going to get off track. Outside temps keep changing and battery capacity keeps changing with age.
While on solar with the batts getting full every day, I reset the Trimettic AH counter every evening when it gets dark--by then the counter is well above zero into positive numbers.
I have checked and when the AH counter is above about plus 15, the SG is at baseline which is True Full. So I could adjust for that. But that amount above zero is a variable for complete accuracy. Don't need that much accuracy while camping. Everything is a variable. Every day is different for how much sun how much battery usage.
The way to tell you are really "full" with flooded batts is with an hydrometer. AGMs require more indirect evidence that most RVers probably aren't much "into" gathering. Still, the AGMs do have many advantages. In winter I would keep mine inside the RV where it is warm in cold weather to keep their capacity up. (Ignoring any risk of them venting) Can't do that with Wets (fumes)
