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.
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And the 90 amp Chinese "trimetric" for $29. Ebay
I have the 25 amp version, which has worked perfectly for a couple of years now. It is a full battery monitor that detects all current going in and out so it can calculate and display the state of charge accurately all the time. In per cent of full charge or amp-hours.
The thing is, a voltmeter provides a very inaccurate estimate of the per cent of a full charge and that only 8 hours after all charging has stopped. A current meter tells you how much draw there is now but gives no indication of how charged the battery is. Better to get the Chinese battery monitor for $29.
Another thread like this one: RV.net
I have the 25 amp version, which has worked perfectly for a couple of years now. It is a full battery monitor that detects all current going in and out so it can calculate and display the state of charge accurately all the time. In per cent of full charge or amp-hours.
The thing is, a voltmeter provides a very inaccurate estimate of the per cent of a full charge and that only 8 hours after all charging has stopped. A current meter tells you how much draw there is now but gives no indication of how charged the battery is. Better to get the Chinese battery monitor for $29.
Another thread like this one: RV.net
