Amazon sale: Renogy 100Ah lithium $630

The Renogy 100Ah LiFePO4 is on sale. My FLA golf cart batts are still kicking (797 deep cycles as of this morning) so I’m not in the market right now. My guess is this means they will be releasing a newer model and want to flush out the supply chain. Sounds like a good deal

watered batteries after three weeks of Eternal Absorption

I normally water every couple of couple of months, but thought it would be smart to check early this time just in case I was boiling off a ton of water. The water use was in line with what I normally see.  I got a couple bloops out of each cell, with the exception of one

solar snapshot, battery costs

solar data I wrote this elsewhere but thought I’d share it here: As of 10:59am local time, the panels have made 790Wh today (244.72w at the moment. It should level off as charging current decreases and I shut down the laptop for the day. By 11:25a when I am writing this blog post the panels

backchannel: DC-DC charging myths

Outbackjoe’s info is excellent.  Here I will address some of his points about what he calls DC-DC charging myths.  The most commonly reported myth is that your alternator cannot fully charge a battery. It can, given enough voltage and enough time, as on a powered cruiser (boat), that spends many hours a day running the

Pb charging: absorption finishing amps and state of health

tracking  endAmps The Absorption stage of lead-chemistry battery charging is characterized by constant voltage (Vabs) and decreasing current.  The battery takes less and less current as it approaches full charge, and finally plateaus at a low rate.  Current is the red line in this graphic: That leveled off terminal rate in the right third is called endAmps,