Quote:
Originally Posted by Pelagic
That does seem attractive.
From your real world experience what would you advise?
My present AGM 24v system is 8 x 260Ah connected series/parallel for 1040Ah @ 24v. ....that historically worked out at 10% consumption @ anchor in 24hrs, BEFORE I had Solar!
Now with 1673 W solar, if switching to this type of battery, what AH rating @ 24v would you be recommending?
|
To have the same
power draft (AGM, max discharge 50%, effective usable 520Ah @24V) you can do that with 700Ah @24V (8 x 700), still have a
safety margin of 200Ah either avoiding the shoulders or going deep when necessary.
If you have the space, 8x1000Ah will double your
storage compared to what you have today and would get you in a very comfortably zone. This are from full to empty abot 28kWh...30kWh with new batteries. Winston cells are usually 20% over-provisioned, so they still can deliver the nominal Ah during the warranty time.
At the bench I tested my cells as I've got them from full after initialising to 2.9V discharge with the
Victron Quattro and two 2000W heaters continous discharge, metering the energy with an inline kWh meter and the
Victron BMV, I stopped discharging 0.1V before the deep discharge voltage (2.9V cell voltage under load! I just did not wanted to wreck them, I could barely believe the results, after switching off the cells recover to 3.1V), and got almost 1300Ah out of the pack (Victron BMV) and 15kWh reading on the 230V inline energy meter.
This was an extreme test, 350A constant
draft 0.3C.
In normal operations I expect 10kWh from full (95%SOC) to empty (25% remaining capacity) with my 12V system, you can double the figures, so 30kWh peek and 20kWh normally with 8x 1000Ah (24V).
Solar harvesting depends really only on the available radiation. We are at anchor for about a week with very unfortunate
wind directions, so most of the time 3 of our 5
panels are partly shaded by the boom,
mast and
rigging, also there is some overcasting. So we make daily only 5...6kWh, where usually we would have about 9kWh with our 1350Wp solar. But still enough to make
water, cook and bake and not need to fire up a
generator.
The SOC is this days between 60 and 90%.
Linear Mode
Recent Discussions