Have watched alot, i mean alot of video about solar panel and battery's on RU-vid i find it difficult to understand some of thus things easy but watching your video just now, have opened my eyes, now i know what i thought i knew, you just gained a new subscriber, God bless you , clearly explained
No, you cannot connect Solar panel to battery direct. Speaking from experience the solar panel was pushing the battery voltage upto 18volts when you test it with multimeter. Brand new Battery was not lasting for three months. Since when i bought charge controller and a new battery it has lasted for 9 years upto now and running smoothly. So Ikenna you are right solar voltage damages battery in weeks.
Thank you for enlightened But you said,the charge controller will adjust to the voltage of the system. What if I used 12v cc for 24v system will it adjust it?
Very informative. With a charge controller connected to a 100ah battery, does it mean series or parallel connection of two 180 watts (19v 10amp) solar panels will not matter since there is a charge controller?
I was boosting my system from one 12v 200ah to two 12 400ah, during this process while disconnecting and setting up things I interchanged the positive terminals of the battery and solar panel so the battery was getting power directly from the panel , the batteries died within 3 days. I noticed it too late.
your information could be wrong about the batterys yes if they lead acid they would overcharge if they are lifepo4 then the internal bms should of shut off charging once a cell reached max voltage for a cell this wont damage the battery but wont be good for it either as it would no doubt unbalance the cells also with out the mppt this would of reduced the effiency of the system also as the solar panels would of been pulled down to that of the battery and struggle to charge would no doubt also keep tripping the bms also depending where this system is 3 panels may of not been enogth to charge the battery everyday this should of been checked by both installers
Can I add new batteries to an existing system? I intend to have a separate setup of solar panels, charge controller and the new batteries than parallel it with the old setup.
Is it possible to hook a battery charger to the solar panel input in order to cbarge my battery at night. Before you ask, the controller can tell me when the batter ia full. Im charging the battey after pumpiing water with a 12vdc water pump.
If the battery has bms and the solar panel has diode to make impossible the electricity to go back from battery to solar panels then is it possible? and also what about the efficiency of this system, I mean it will be lower than the efficiency from the system with mppt charging controller but by how much?
Efficiency would be better if theres is no charge controller. For example, you have a battery of 200 volts if full charge. You have a solar that can output 170volt max. And you have an inverter that would accept 150vdc up to 200dc. Your battery will only charge up to the voltage that the solar can give.
The ONLY way I'd even come close to connecting a solar panel to a battery without a charge controller would be that if you have a SMALL panel that you connect to your car battery and use it sparingly to as a trickle charge so it won't run down. That's about it. A larger system like what you're talking about..... um, NO. Plain and simple, NO.
Dont also mislead charger control not all detect battery voltage must verify system that you bought voltage hybrid inverter also charge controller they are all rated the rest of information you are right
Sure! To a lead acid battery 🤣 Or if the PV has absolutely no hope of overcharging the battery such as a 5S battery hooked up to a 19V PV with a max 0.1C charge or some such. With unlimited charging you’d end up at 3.8V each unbalanced.
what's funny is, if it was a lead acid battery, it will take the excess voltage and drop it down to about 13 to 14 volts. But, it would eventually charge..then over charge and boil over. Great for emergency charging if you charge controller is blown. But, lithium batteries have a BMS, so are limited to about 16 volts, some are up to about 60 volts. My lifepo4 batteries can support 4 in series, so the BMS can handle about 60 volts. In an emergency, I could hook my panels at about 40 volts directly to a battery (volts will drop at the battery to a smaller value) and just monitor the voltage to keep it less than 14.3.
