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Q1: Welcome to Off Grid living. Li Fe PO4 Battery technology Custom Lithium from Brisbane is perhaps the best technology on the market. With a Smart Battery Monitor built into the 24 Volt cells, the battery is protected from over charge, under charge and balance issues.
Here is the new technology running on Nickel Iron Phosphate technology. However the old batteries could not push out the required 45 amps for very long. So I purchased a 24Volt LiFePO4 cell at 310Amp/hr, and running this to a low cut out voltage of 25.1 Volts, this leaves around 80% of the State of Charge left, about 250 Amp hr to run the Inverter all night. The inverter needs 25 to 45 Amps to run, assuming 20 Amps continously. So running 15 hours each day without sunshine, drains 300 Amp/hr every day. So the battery cell is ran flat to 25.1V every day. Initially the Inverter was switching off too often ( low battery Voltage warning ? ) and reading up on Victron Forums, I discovered poor connections might be the problem? So throwing away re-settable fuse breakers and buying a fixed fuse that blows up when overloaded, I installed a fixed fuse holder with a 70 Amp fuse. Upgraded the wire lug to a 10mm fixing hole and 25mm cable. Now things seem running nicely.
The Inverter is draining 45 Amps and the Voltage is 26.3V ( I use cheaper Hall Effect Ammeters, rather than fancy Victron products)
The solar panels are still pushing 11 Amps into the batteries, despite it nearly being dark.
A picture of the Inverter Custom Li Fe PO4 battery and the three Solar Controllers The red arrow shows the solid fuse I replaced the other faulty fuse system.
The view from the other side, showing Air Conditioner and Inverter. Between is a switch for turning on Hall Effect Sensors to read current coming into battery and current leaving battery. I like to keep things simple.
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Created by Rob Thompson. Hosted since 10/01/2012. Visitors HOSTED by Prologic, my Son. A thin website.
