can be useful, but you should also look at your boat's shore-power connection. Adding a diode ground-isolator, or better-yet, an isolation transformer, can greatly reduce your electrolysis
When VALIS was in San Francisco
, I was able to keep the batteries charged with my solar panels
, so I had no shore-power connection and my Zincs lasted a long time. Since I moved VALIS up to the PNW, I've found I need to run a small heater to keep the condensation
from being a problem. This means I need to run shore-power. I installed a diode isolator (this one
), and hang a Zinc fish
from the backstay chainplate. We shall see how my zincs hold up. I need to make some current
measurements -- I don't know if I really need the fish.