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I am looking for a low cost Benchtop power supply to charge assembled 12V & 24V LiFePO4 battery banks that have BMS systems installed. The features I am looking for are: Variable Voltage (Up to 30 V) Variable Current (10 Amp or more) I would like good accuracy (.01V) on the built in volt...

I will occasionally have a need to leave a system unattended for several months. The LiFePO cells are great for this because 1) they don't need to be kept topped off (in fact it is better if they are not) and 2) they have a very low self-discharge rate. However, having the BMS on the cells...

Folks, @Will Prowse gave reasonable high marks in his video about the 48V Jakiper Rack mount battery. Has anyone tried the 24V Jakiper? Is the quality equivalent to the 48V? (The 24V looks totally different than the 48V) https://jakiperbattery.com/product/jk24v100/

It won't be on our roofs anytime soon, but a fun bit of research to think about: https://www.inverse.com/innovation/researchers-have-a-counterintuitive-concept-for-solar-panels-that-work-at-night

I was looking for the specs of the 7-Pin connector used for trailers and I ran accross this page. https://amsolar.com/blog/high-current-alternator-charging-and-the-7-pin-connection High Current Alternator Charging and the 7-Pin Connection Because of slim wire gauges and long...

Does anyone have experience with the Reongy 170Ah 'drop in' battery? https://www.renogy.com/lithium-iron-phosphate-battery-12-volt-170ah/ Yes, I know I can build an equivelent for a fraction of the cost. I have someone that wants to go this rout and is asking how good it is (or is not).

Folks, We are so used to DC negative being black that it almost feels like a law of physics. However, since AC wiring always has the hot wire as black (In the US), there is a growing trend in the marine world to make the DC negative yellow. This helps avoid any confusion between the two...

I saw that they released version 4.0 of the chargery firmware..... so I updated my unit. Now I have a bit of a problem. My bank is 12V 200Ah LiFePO4. The unit is displaying the Amp hours but the meter is reading empty. The unit is also alarming that the SOC is low and the discharge relay...

CATL-Built Tesla Model 3 Battery Pack Will Use Prismatic Cells https://cleantechnica.com/2020/02/19/catl-built-tesla-model-3-battery-pack-will-use-prismatic-cells/ I did not see that coming!!

I am curious about their track record. https://www.aliexpress.com/item/4000354517418.html

I am considering using two DIN rale Mount 63A breakers as disconnects for two pairs of PV lines going to two separate controllers. I would mount them on a DIN rail inside this box. The metal box would be grounded. Does anyone see any NEC issues with this? In particular is there any issue...

Scam or real? Victron for smartsolar 150/45 for $100? https://www.crvinfo.club/mppt-controller-energy-charge-victron-150-45-tr-smartsolar I don't trust it.

Hi folks.... A while back @Will Prowse did a video on a 48V set up using a new BMS with Bluetooth. I bought one but got distracted on other projects and I am just now getting around to using it. The embarrassing thing is.... I can't find the APK for the bluetooth app.... Does anyone...

Nice Find Will. I really appreciate all the research you do and share!!! I was hoping it would cover low-temp charging but it doesn't. I had always heard "Never charge below 0 deg C (32 Deg F)" and in your videos you talk about keeping the temp a few degrees above freezing for charging...

I can see the list of folks I am following, but I don't see a place that lists who is following me.

I don't need an oscilloscope very often, but when I do need one it there is nothing else that can do the job. Consequently, I am considering acquiring one. * The need is often to compare two signals, so a two-channel scope would be a must for me. * The need is almost always for...

Folks, I have a need to replace a failed solar panel on a boat. Space is extremely tight so there is only room for a single panel. Consequently, I am looking at 300-400W panels. I would like to find one that has internal parallel strings in order to minimize shade impact. (It is hard...