My
boat has 2 x200 Ah
batteries as the house bank. These are apparently wired as 1x 400ah
battery so I cannot use them as a 1 and 2 configuration.
On my return to the
boat after 5 months away I noted
When using by bowthruster./winch etc , any large DC user the
Raymarine E7 would drop out. I presume on low volts. A quick look at the link when using the Bowthruster showed a drop to +- 9.5 v.
I conducted a little test on the two
batteries as one "all" ie 400 ah cap
time DC amps AmpHrs Volts
start 12.5
12.44 -38.2 -8.3 11.45
13.16 -37.3 - 28.1 10.90
13.26 -36.9 -34 10.75
13.38 -36.5 -41.5 10.5
13.48 -7.5 -42.5 11.9 reduced load
13.55 -1.7 -44.6 12.3
14.19 -1.3 -45.2 12.35.
So what does that tell me.
Should a DC load drop the
battery voltage that much?
sufficient to trip the E7 on low voltage?
I am guessing this is why it trips, however I can make it trip just by pressing the bowthruster button !
Is it the batteries or is it the E7?