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What does that mean ? E.g. a Solar Panel rated at max. power output of 300W with a efficiency spec. of 20%, does it mean the maximum I can get out of it is 25% of 300W, which is really 60W ? Or it really means, it can convert 20% of sun energy impacting on it, and can deliver to a maximum of...

Hi, being a newbie to rooftop solar, please excuse the general nature of this opening question! I am looking at installing a single or dual ( depending on sizes ) solar panel, for as much power as I can afford. So my questions are 1) Should I go for house panels for reliability and output for...

Hi folks, I need to temporarily charge my 4x100 Ah of LiPo batteries directly from my vehicle battery for identifying the problems with my camper battery charging system. Would that cause any problem to the health of my batteries, probably the duration would be no more than an hour, at the...

I know this is not for this forum, but it is 18650 batteries related, hope someone can help. I have a Ryobi battery which has 5 x 18650 cells of 3.6V each. It just won't charge at all. The battery has only been used infrequently for about 4 months. The voltage of each cell is 3.3 volt, so...

Testing this newly got solar blanket. By covering only about 6% ie one half of any cell, the output current would drop by 50%. Is there hat normal?

I have new 4 LFP batteries. When they are fully charged, ie not accepting any more currents, their voltages are spread between 14.2 to 13.5 volts, is that normal, no problem about connecting them in parallel into one bank. Please comment.

Now that I understand LFP much better after acquiring two VoltaX 100AH, I want to build another 200AH to compliment. Is it advisable to combine different LFP batteries in a bank, using the same chargers? What is the approx cost/AH all up for own built LFP ? I am an old electronic hack, so...

I just done some capacity tests on my VoltaX 100AH Li batteries X 2 in parallel, giving a theoretical 200AH capacity. I ran down the batteries with a 2000W inverter on a 1 KW halogen lamp. Occasionally, I also run an additional 800W blower for a short period of time. Here are the results of...

For Aili monitor Just want to know what is general feedback on using the Aili monitor, I am thinking of getting the 350A shunt with it of they don't have one higher, ideally 500A. Is it suitable for LFP batteries? It seems that it only calibrates the full capacity of the battery, and go from...

What does the output Amp rating of a dc-dc charger mean? Is it a maximum rating? Or is it a constant current rating, where it'll draw as much power from the input as possible to deliver that current, if that's the case, what is the danger to the input source if it can't deliver? Would it...

Currently trying to determine the best cut off voltages to protect the my bank of 12 V LiFePo4 batteries. 1) use 11.8 volt for under voltage protection before it completely depletes the battery. I think at that stage, it should roughly have about 10-15% charges. 2) use 14.5 volt for over...

Hi I just got hold of a battery monitor that comes with disconnect protections for a) under voltage - settable from 10.5V to 12.5 V b) over voltage - - settable between 14.2 to 17.2 c) over current - level settable between 5 - 100A except it is not for 12 V Li batteries, which my system is...

I was wondering how accurate the capacity monitors on the market are? The reason I ask is, some of them don't need calibration, and some only calibrate the "zero" point by discharging the battery, but what about the "full" point ? Some measure the current going in and out, but without...

Hi I am putting together a charging system for my motorhome, which has 4x100Ah LFP house and the usual Pb Acid Crank batteries. My charging sources are 1) alternator, 110A rated 2) AC mains - when I have access, and when the vehicle is stationary 3) Solar Blanket 350W I plan to connect, A)...