12v solar charge controller not turning on reddit. When I went to bed, I turned off the inverter. The 12VDC house batteries power all my various electrical needs while parked, and are (hopefully) recharged by the PV panels through the charge controller. Feb 26, 2025 · 1. Disconnect the solar panels and then the battery. Some of this is my fault for buying the cheap solar controller though. It's probably not something you can buy. 4 as specified on the battery Float voltage: 13. Thanks! Jun 5, 2024 · I have my 12 volt system setup with cables connected to my victron smart Solar charge controller. So you cannot parallel those. 4V will destroy the Renology controller. My panels and charge controller are from BougeRV, and the controller is set for LiFePo batteries. 2 or 38. 0 amps and the battery will not charge. Sometimes a split DC to DC and separate Solar helps with today's Solar Options so you can match solar to your system. They're in parallel. Noticed this morning that the power was off, and the charge controller is not lighting up at all. This also allows rapid charging as both can supply current to the battery. In yellow you can see where the positive and negative connections are. Your battery is so low it thinks its a 12v. Whenever I would swap for a new solar charger, it would look like it worked for about 10 minutes then it would go back to being stuck in float mode. I think I had the same controller. Second day there their fridge wasn’t cold and the voltmeter in the trailer was showing 10-11volts which is low. To avoid this, I have found that you *always* want at least a 1-2 second interrupt (Zero Volts) when you are switching charge sources on the DC Input. Hi there! I'm setting up a LiTime 12v 100ah group 24 smart LifePo4 battery with a victron MPPT 75|15 solar charge controller. Doing so might change the deadhead at 13. I have two Liontron lithium batteries totaling 300ah. I have 2 solar panels connected to 2 batteries and an mppt charge controller. 81v, 0% = 10. Question 1) Buddy got a new 2022 wolfpup 17JG that has the solar panels on top. We want to upgrade from a 12V system to a 48v system. I then wired in the solar panel and the display turned on that it was generating about 20-22 volts. That logic only applies if you're using really crappy and ancient PWM charge controllers. Then hook the battery back up. I want to see the battery level remotely so that I can turn off some devices when there's not enough sunlight. In short: connect your fuse box to your battery, not to your charge controller. This can confuse an EcoFlow MPPT charge controller and make it "stall". I don’t have my solar panels set up just yet so it’s only connected to the battery. The problem is that the solar is not charging the batteries. As far as I can tell, we could do that by having a 48V solar array, into a 48V all-in-one solar charger/inverter that charges a 48V Since I’ve had the camper, the battery as stopped charging. It can hit 650 on cold sunny days. Without a charge controller this will indeed eventually overcharge and cook your battery. A friend was putting a solar panel on one of those pop up tent trailers and it was a zero budget install. Im assuming your charge controller only has a auto voltage selection and not a manual battery selection. 6??? Low voltage cutoff: 13v??? Reconnect voltage: 13. Most people just use the charge controller to charge the battery, and then power their devices by connecting to the battery. However I don’t think the solar charge controller recognizes that? Could this send too high voltage to my fan and burn it up? The fan is connected to the battery with alligator clips on the batteries terminal. 20W Solar panel positioned on old satellite dish mount Using this YT video as a guide, I connected the 12V Duracell battery, solar panel, and water pump to the solar charger controller using 16 gauge wires. PWM solar charge controller However now the battery is only showing 10v ( 9) as the time of writing this post on a multimeter when testing the positive and negative leads of the battery , I tried to turn on my solar charge controller to the battery but the screen won’t even turn on I've never seen anyone connect directly to the solar charge controller's (MPPT's) LOAD outputs. From there I'm powering light switches, outlets, mini fridge. No Power or Display Not Turning On Possible Causes: Loose or disconnected battery cables Blown fuse or tripped breaker Battery voltage too low Controller malfunction Troubleshooting Steps: Check all cable connections to ensure they a I ran the wires from the battery to the charge controller first (it’s a 12V/24V combo so this step being first it’s important for it to detect battery voltage), I noticed the display of the controller didn’t turn on like normal. Hi guys, Two questions: I have a setup which consists of a solar panel, solar charge controller and a LiFePO4 12V/50Ah battery. This makes me think that’s why the charge controller thinks it’s a 24v system. in your case it's right on the tin, 18. 8 volt - discharge beyond 30% will damage the battery over time. What am I doing wrong? My charge controller will not turn on when I connect the positive and negative battery cables to it. This would make the charge controller run as a 12v system and This is not that :) My battery charges fine during the day from the 60w coming from my panel. Nowdays, most everyone uses MPPT charge controllers which can take anything from within their operational voltage range (say 0 to 150 volts) and convert it into a specified voltage that the battery needs. The batteries BMS shuts down the battery to prevent damage. Worked for years until the trailer went to the great junkyard in the sky. Note charge levels for 12v agm (usual deep cycle) batteries: 100% = 13v, 50% = 12. I'm new to lithium and want to make sure my settings are right: Charge voltage: 14. If it does manually set it to 24v. . 1100 watts \ 24 volts (the Renogy controller can support a 12 or 24 volt battery bank) = 46amps. You can however DIY a relais switching between solar and DC input based on the engine turning or not. Your controller shout cut the battery off at 11. If it is not, you're still draining the battery by the difference each day. That 12v cable has a fuse in it that doesn’t seem to blow quick enough. There are both 110V and 12V loads that are powered by the system. 7v. Or, when there's no snow, the charge controller doesn't do a proper float charge and that also kills the battery. When snow comes, the panel doesn't make enough power and the battery diesthen, when the snow melts, the charger won't charge because the battery is too low. I thought it would still turn on and my battery has nearly 13 volts but the charge controller doesn’t seem to have power and I can’t find it on Bluetooth See full list on discoversolarpower. The problem is that the percentage for the battery is completely off. Without a charge controller (and even with, if you use some cheap ones) many solar panels generate way More than 12v. The batteries were run down to 0%, but in the morning after about an hour of sun, the charge controller shows I purchased several products, solar kit whose charge controller was too small for the panels that came with the kit, so i purchased a separate charge controller, a lithium battery and an inverter, I am unable to register my products for the warranty because i purchased through amazon. You do not need to use 24v panels. I am planning to mount the panels and connect them in parallel to charge lead acid batteries and run a 240v AC (based in the UK) inverter for a dehumidifier and washing machine. It uses 3 100W panels to a 40A charge controller, a 12v 400Ah battery, and a 2000W inverter. The panels have standard MC4 connectors. The charge controller only turns on when I plug in my solar panels which are over 20v. I have a solar setup that is giving me some headaches. 5 volts. The relais also needs to switch the "i" pin of the xt60i. If the controller is not working, check the voltage of the battery to ensure it’s within the operating Mar 10, 2024 · Many times, your solar charge controller is not working properly, and then you should search online for how to reset solar charge controller. The solar charger (changed from Renogy to Victron) The last thing are the batteries. You have to have at least one battery or the charge controller will not turn on. 2v??? Could be the controller or not getting enough power from solar to the controller, hard to say. If I turn off the ignition and park for several days, the SLI battery is protected from being depleted by my using the DC house batteries. That controller also doesn’t support such a large load directly. I don't remember the manual, it was a bunch of years ago, but there's usually not much to do with a 12v lead acid battery install. If it still doesnt read it right you will have to charge your battery manually. The 38. I run my laptop through the inverter and everything works great. 5v charge limit. Speaking of the controller, 550 watts x 2 panels = 1100 watts. What would you recommend as a budget but good solar charge controller and battery setup? Thank you! SOLAR ALTERNATOR The Trick Stuff: The DPDT relay can switch between sources/voltages very fast. 05v, 30% = 11. The solar voltage shouldn't hit the battery because it will kill the battery. On the left most battery is the positive and negative connection for my inverter. 4-volt systems. I can see amps coming in through the solar panels on the solar controller screen, but the charger screen shows 0. Rain Water Harvesting 16awg, solar controller, water pump, 12 battery, and solar panel 12V Duracell battery. The only thing that could be a load would be the charge controller itself. If you have four of the 150W solar panels, some were designed for 19. We went camping with them for the maiden voyage and the campsites didn’t have shorepower so they were running on 12v/Solar the whole weekend. Do you have a multimeter to separately check voltage? If you’re confident in messing with the controller you can use the User settings to match the charging specs provided by Amperetime. So what I’m deducing is that the solar charge controller should turn on when the battery is connected to it. com Aug 29, 2023 · Understanding Solar Charge Controllers Solar charge controller troubleshooting usually entails checking if the solar panel and battery are correctly connected to the controller, inspecting for any signs of damage or wear and tear, and reviewing if the settings are appropriately configured. It does work with shore power, so we know the battery itself is not the issue. I've put in two 170Ah LiFePo, each at 12V.