Poor Man's Trimetric?
I want a cheap sort of 12v battery monitor that can measure at least 100a and keep track of AH. Need some advice here on whether these possibles are any good in the first place, and then about the ac...
Forum Discussion
I thought I saw something on Amazon, but it was the same as your first link.
Check out this' monitor' if you want a laugh, but maybe the voltage enjoying types will like it for the warm and fuzzies having no basis in reality:
http://www.amazon.com/SMAKN%C2%AE-Battery-Indicator-Capacity-Meter-Blue/dp/B00UY9PY44/ref=pd_sim_469_67?ie=UTF8&refRID=1H7EKCWKT3XMXM6GP2M7
Could you install another correct Shunt and some twisted pair leads for the trimetric and swap it to the TC any easier?
I assume new leads would require a rezeroing of the trimetric with zero loads on each swapping to achieve any accuracy in amp readings.
It appears this problem has no inexpensive solution.
I had one ammeter with the same shunt shown in your links, and its resolution on 1.5 amp loads or less was quite poor.
I think for the accuracy you seek, something requiring the Deltec 500 amp shunt or similar might be required.
On a side note I often see on other forums how people with portable 12v compressor chest style fridges recommend turning the fridge off overnight and then claim they only lose 1 or 2 internal degrees in 8 hours. If this was the actually accurate, and not just an internet claim, then it is likely cold enough outside to barely require refrigeration at all.
My 1.8 cubic foot 12v compressor fridge's consumption really declines to about 7.5 AH in 24 hours when average temps are mid to high 50's, but climbs upto the 24Ah range at close to 80f and will be closer to 34AH at 90f.
I put this 64 AH maximum wattmeter on the input leads to know this:
http://www.amazon.com/GT-Power-Analyzer-Consumption-Performance/dp/B00C1BZSYO/ref=pd_sim_422_31?ie=UTF8&refRID=0CDNR1CH8CRFT3PYZFXX
When it exceeds 64AH, it flips back to zero and starts recounting.
Wish I could help, but other than having another shunt and the ability to swap the trimetric easily from rig to rig, I think you are in the two trimetric camp.
Wait, this might be helpful:
http://www.cruisersforum.com/forums/f14/low-cost-battery-monitor-137003.html
Check out this' monitor' if you want a laugh, but maybe the voltage enjoying types will like it for the warm and fuzzies having no basis in reality:
http://www.amazon.com/SMAKN%C2%AE-Battery-Indicator-Capacity-Meter-Blue/dp/B00UY9PY44/ref=pd_sim_469_67?ie=UTF8&refRID=1H7EKCWKT3XMXM6GP2M7
Could you install another correct Shunt and some twisted pair leads for the trimetric and swap it to the TC any easier?
I assume new leads would require a rezeroing of the trimetric with zero loads on each swapping to achieve any accuracy in amp readings.
It appears this problem has no inexpensive solution.
I had one ammeter with the same shunt shown in your links, and its resolution on 1.5 amp loads or less was quite poor.
I think for the accuracy you seek, something requiring the Deltec 500 amp shunt or similar might be required.
On a side note I often see on other forums how people with portable 12v compressor chest style fridges recommend turning the fridge off overnight and then claim they only lose 1 or 2 internal degrees in 8 hours. If this was the actually accurate, and not just an internet claim, then it is likely cold enough outside to barely require refrigeration at all.
My 1.8 cubic foot 12v compressor fridge's consumption really declines to about 7.5 AH in 24 hours when average temps are mid to high 50's, but climbs upto the 24Ah range at close to 80f and will be closer to 34AH at 90f.
I put this 64 AH maximum wattmeter on the input leads to know this:
http://www.amazon.com/GT-Power-Analyzer-Consumption-Performance/dp/B00C1BZSYO/ref=pd_sim_422_31?ie=UTF8&refRID=0CDNR1CH8CRFT3PYZFXX
When it exceeds 64AH, it flips back to zero and starts recounting.
Wish I could help, but other than having another shunt and the ability to swap the trimetric easily from rig to rig, I think you are in the two trimetric camp.
Wait, this might be helpful:
http://www.cruisersforum.com/forums/f14/low-cost-battery-monitor-137003.html
