Thanx Paul !
Our boat is hull
nr. 131, and we expect handover on june 6.
Yes...I do see your math, and to be honest I had actually decided to go Lead Acid, just to get som peace of mind on this issue. Plenty of other things to handle before we set sail in august!
The Victrons are certainly top of the line, perhaps they are worth the extra cost...? I got an offer recently that would come out to about 9,21 AUD pr. Ah. Nominal not usable ! I forget the brand name, I'll have to get back on that. That would also be ex VAT, which I can do since we are not bringing the yacht back to Norway
That is a little less than half the price
of the Victron batt that would come out at about 20,8 AUD pr. Ah (incl VAT though)
I am also intrigued by your housebank size. It is almost twice the size I am considering for our boat in usable Ah. Could I bother you for a short briefing on what your charging
Part of my dillemma you see, is that I believe I could dispense with a costly hydrogenerator if I were to shift to LiFePo. The fast absorption rate of the Li batts may allow me to live on solar
(2 separate sets nominal rate of 1160 W altogether), a backup 2000W petrol generator
use (250 A if running both engines)
My calculated DC power consumption
under way at night is about 260 Ah, at anchor
at night about 140 Ah. This will see our housebank (425 Ah usable) at about 50 % SOC in the morning, before starting engines for hotwater and charging
while at sea. At anchor
the SOC would be over 70%.
On a cloudy day with solar
running at 60% efficiency would see about 390 Ah produced. Consumption
at about 270 Ah during daytime underway. This would mean about a half hour with both engines running to balance the equation. (assuming that Li truly absorbs at the rate I am told!)
At anchor, even with solar at 60% should see the energy balance in black figures, about 130 Ah surplus energy without running engines.
That would be in theoretical terms, what it will be in practice remains to be seen of course.
Very grateful if you choose to share your thoughts on this!