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yes, 100w in the right conditions of sun but under the rain, volts still go high > 14v with and current drop a lot like few milliamperes (and become useless power)!! so, to kill the static volt during the night by the street light i put 1k/1w resistor in parallel.. amp come with the sun and only...

hi, under heavy rain at midday with a 100w solar, 1-2 watts is my usual but those days are very dark (streets lights turn on).. also by sure that you don’t shadow your cells when your do your measurements.. under a sunny clear sky at noon perpendicularly with the sun, you should have around your...

on bench with 2 power supplies (one simulate the PV at 18v, 2nd charging the 12v battery).. what happen is the controller stop charging when the battery is over 14.6v with the 2nd supply.. nothing bad here.. Victron and Regony controlers spec say battery voltage disconnect at 16v (don’t know...

if your controller is setted < 14v or 14.2v for longer lifetime, on a LFP battery, the DALY bms will never balance the cells!! ..with Bluetooth, if the voltage can be changed for balancing is different but less to able to change it, it’s a bad new!!

hi, maybe i’m to late here but according to Victron specifications (MPPT vs PWM section) for a 12v batt and 12v panel configuration, the PWM have the advantage of to be able of to charge during hot days where the Panel Open Voltage can drop to 16v and because a MPPT start to work when the PV is...

hi, a friend ask me if he install a 50 to 100w Solar Panel on him car for to compensate the draw/parasites/alarm discharge and be able to use radio many hours less to have fear of some boost help later (and for to have a better lifetime with the car battery).. i have discussed with him and he...

reference the spec table of this Li-ion BMS: https://dalyelec.en.made-in-china.com/product/oNGmhzFCkSkc/China-Li-ion-4s-12V-10A-Lithium-Battery-Protection-Board-with-Balance-PCM-BMS.html

any good brand should be fine and the cheaper ones should be avoid.. i has paid 30$ for a new PWM Renogy which stop working few days later (and returned).. each time i buy something, i test/stress it now.. Mppt is better if your panels array voltage is higher than your battery voltage (because...

hi, i never used bms yet but think about it.. if i hope to have the best cycling life, i should avoid both Max/Min voltages situation.. right?? ——————————————————— reference BMS DALY Q&A: Q: What is the balance function? Do we need cell balance or not? A: The working principle and function are...

i don’t have in mind to protect all things with beakers/switches.. when i want to shutoff/isolate something, i pull the plug.. between the panels and controller, your have at least 2 plugs MC4.. think about that, each cells have a tiny wire connection (which can act as a fuse).. how a fire...

for a 12v/24v network of 400w, if you want to avoid the psychological stress of those low voltages, i suggest a switch!! because a breaker of 50amp on a 25amp shorted panel network is like put your money by the window..

i don’t know why you should need a breaker protection higher than the current measured (or calculated) of your panels shorted.. and as the optimal current is near of the shorted current, that become delicate because between those limits is too near of the optimal current and so, the breaker can...

someone know how much consumption the controller will take? i’m curious if you know it on your model (pwm or mppt)..

hi, i have soldered a 18650 pack without problem (iron around 350-360c) but because my pack become hard to debug (also it’s not a good idea to re-solder more than once), i have now a 4s2p done with 18650 Li-ion 3500ma on 4 pack batteries holder back to back (16.8Vmax output) with a cheap bridge...

hi, any low power tungsten bulb 110vac (40-60watts) will work when in serie with your cable (if the battery is less than 110v) for few seconds.. on a low voltage battery, a 20w buld work well because filament resistance is lower when the bulb don’t light.. me, i don’t like big sparks and it’s...

hi, i’m new and this is my fist post! happy to be here with people which hope to build (or try to understand) solar system.. because all controllers need the battery connection first and some manufacturers have upgraded to lithium, my question is simple: because lithium have BMS with cut-off...