New AGM House Battery Bank 

Wow what a week, we got to the island and realized that the batteries were only holding a charge for <1hr, I was confused and popped the hatch and jumped into the engine room to diagnose.

The skinny, batteries looked ok – but they were bone dry (no good). So I woke up early on Saturday and dingy’d into Two Harbors general store to get some distilled water to “top them off”. Long story short and 5 gallons later we topped them off and looked at the charge meter on our Xantrex. I thought everything would work again, but I was sorely mistaken. Our batteries were officially fried and only hold a max of ~2hr charge.

On our way back I called my mechanic and started to source the new batteries, after this snafu with lead acid and my failure to monitor the h20 levels – gotta get AGM (Absorbent Glass Mat) vs traditional deep cycle batteries. This will solve the maintenance issue and also create a safer engine environment (sans sulphuric acid + off-gassing).

$2400 bucks later and three trips to WestMarine and we had all the cores returned and new batteries on deck.

*uner important is to draw the wiring out on a piece of paper so we don’t forget the way it was before removal.

old batteries before removal above…goodbye you had a short but exciting sailing career (over 15 trips to the island in 3.5yrs!)

New batteries being installed…don’t they look sexy? (ok Sailboat sexy…)

Almost done!

It was a fairly difficult project because the old batteries were 62lb each (leaking water/acid) and the new ones 67lbs each – so we had to muscle them into place during a scorching hot summer day. As always Pedro (my mechanic extraordinare) is great and helped me get the job done properly and safely.

Follow up: we couldn’t get the battery cross members installed (AGM’s are about 1/4 inch taller, so we installed a locking clasp on the battery bank lid – see below. Smart idea from Pedro to make it secure and not allow them to move a inch!

Pheew – here’s to 5yrs of service free battery life 🙂

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