This is the power supply I used at Sunpower for this, it's $78 on Amazon.
No need for the expensive one shown in the Sunpower tech bulletin. The
important things are a constant current setting, and manual fine voltage
adjustments. For the first 5% it's important to charge low and slow, we
were told
>
> Does anyone have good information about whether a regulated power supply
> is necessary versus just a battery charger?
>
The two battery ecosystems that we've been required to revive are Fortress
and Blue Planet. In both of those situations the manufacturers either
mailed us or recommended w
Hi Wrenches,
I wanted to follow up on my results, as it relates to some current threads on
Boot-strapping discharged Lithium batteries.
This off-grid project had 3 x 20 kW 48V stacks of Lithium batteries, made by
GSL Energy. They sat in an abandoned construction site for 18 months powered
off,
A DC power supply was recommended to me by a former SunPower field app
engineer, but it’s about $1,600. Maybe justifiable if were are going be in the
business of black starting lithium batteries now. Does anyone have good
information about whether a regulated power supply is necessary versus jus
Power supply costs have decreased considerably. Twenty-plus years ago, they
were about ten times the current cost. Now, you can get a 60v 5amp supply
for less than 90 dollars. For a bit more current, I like to use two 30-volt
ten-amp supplies (in Series).
When LFP batteries shut down due to low ba
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