Recent content by metalheaddoc

Ah. Thank you for this. I totally didn't understand how it worked. I thought it was a fancy voltmeter. It seemed to work well in the past when running loads. But I did not know it would not register small draws or self-discharge. So the low power draw of the SCC and meter must have eaten the...

I have two Weize LiFePO4. And it was for emergency backup power. The battery charger I used reported the batteries were full.

I have an AiLi battery shunt monitor on my system which has 2 12v 100ah batteries in parallel. I am having trouble with accuracy. I have the monitor set to 200ah and I recently fully charged my batteries and reset the monitor to 100% as per the manual. I have let my system sit idle for a few...

Thank you for confirming the 3.7v as the proper value. I have seen on Google that the battery within the power banks is 3.7v but it boosts the voltage output depending on the output need. But I just wasn't sure what to plug into the calculation.

On the little power banks, like the ones to charge phones, how do I convert the mAh to Wh? Do I use the USB voltage of 5v? Some have USB-C that can output more than 5v. So I am unsure how to calculate the Wh. I want to be able to calculate how long the bank will last if I am using it for a...

What is the best way to compare solar generators like the Bluettis or EcoFlows etc? I get overwhelmed by the choices. Many of them seem to have similar features. How do I find the best value? Do I compare by Wh/$ of the battery? The inverter sizes all seem adequate for my needs so that doesn't...

If I recall, out of the box, the default is set to 100Ah. But that setting needs to be double checked too.

I have the same monitor. Did you calibrate it for 100%? There is a procedure in the manual. You charge the battery fully, then you do the procedure to "tell" the monitor that "Hey, this is 100%."

So if I connect it directly to the negative pole of the battery, nothing passes through the shunt so it can't measure anything?

My Weize 12V 100ah ran down to 7.8%. I hooked up a 10amp AC charger to charge the battery. My AiLi battery meter froze at 7.8% and didn't move or indicate the battery was charging. When I disconnected the charger, the AiLi was still frozen. I unplugged it and replugged it back in and it works...

Thank you for the info. I don't even really have a plan for the panels. It was just fantasizing a DIY system for fooling around and experimenting and learning. I wanted to do a 4 x 400W system.

Oddball question. If someone is in a cold location but it has a lot of sun, can you build a battery enclosure like a greenhouse to heat the battery a little above ambient temp? Like an enclosure with a glass top to let sunlight in?

Right now, I have 6 x 100W Renogy panels set up 3s2p. I just have them on the ground propped up on a couple of cinder blocks and 6 ft long fence slat. Cheap. The fence slat is bowing so I might but two more and screw them together to reinforce it. They were only like $2.18 each. I can adjust...

I have checked CraigsList and Facebook Marketplace and don't see much. Should I contact local solar vendors and ask if they have any used panels on the cheap?

I can adjust the angle. It just have them propped up on some cinder blocks and wood.