Trailer Battery Load Support
As a followup to my recent discussion about my newly acquired CTEK Multi US 7002 Charger I'd be interested in some further input on the subject of trailer battery load support. :) First, I should c...
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Got curious so I just ran a little test in the 5er for voltage sag, wire vs batts. Used the Trimetric which is only to one decimal point, so that can throw things off some, but anyway, this is how it came out.
Voltage calculator entry of my inverter to batt wiring as WAG equivalent to 7 ft pair cu #1. Battery bank four 6s and two T-1275s (all 5 years old and down 10-15% in capacity from new) lashed together in a hodgepodge way for I believe about 670AH worth of bank based on some load testing I did recently.
A. Kettle- stamped rating 1000w, pulled 84 amps, voltage sag 0.6v, wire loss calculated as 0.15v, so batts sag was 0.45v
B. Toaster- stamped 800w, pulled 66 amps, voltage sag 0.5v, wire loss calculated as 0.11v so batt sag 0.39v
Pick somewhere in all that and say for 75 amp draw, sag 0.55v with that being 0.12 wire and 0.43 batts
Highly scientific lab quality work of course. :)
Voltage calculator entry of my inverter to batt wiring as WAG equivalent to 7 ft pair cu #1. Battery bank four 6s and two T-1275s (all 5 years old and down 10-15% in capacity from new) lashed together in a hodgepodge way for I believe about 670AH worth of bank based on some load testing I did recently.
A. Kettle- stamped rating 1000w, pulled 84 amps, voltage sag 0.6v, wire loss calculated as 0.15v, so batts sag was 0.45v
B. Toaster- stamped 800w, pulled 66 amps, voltage sag 0.5v, wire loss calculated as 0.11v so batt sag 0.39v
Pick somewhere in all that and say for 75 amp draw, sag 0.55v with that being 0.12 wire and 0.43 batts
Highly scientific lab quality work of course. :)
