To charge a standard 12-volt battery, you have to bring it up to above 14 volts (amount varies with the type of battery). This is done in conjunction with the MPPT control, that's like handling two situations at a time for delivering the most favorable results for the battery. If not, write me! Connect them together (just as you would when connecting two ordinary 12V bats in parallel). If everything was wired right the load wires will connect to the middle batteries. Most garages usually have a battery tester that puts a load on them for a few seconds and measures the voltage drop and could do this test for you. It is better to connect all your panels through the same regulator so you might need to check the regulator is rated for the total wattage of the solar panels you have connected. For your other question about the wiring, are you asking about parallel wiring 4 12V batteries together or 4 6 volt? More Power: High output and longer run times. Digital Voltmeters should read as the voltage is shown in this document. When I switch to the 12 volt batteries, do I connect all the wires that currently are connected to the positive on the 6 volt to the positive of the 12 volt. hi simon It might be a good idea to get a better charger and wire it close to the battery bank with the recommended size of wire for the amps that will be going through it. Is Li-ion the Solution for the Electric Vehicle? [29] A 1C discharge rate would deliver the battery's rated capacity in 1 hour. Connect a second bank of 5 in parallel giving you another 12 volt 500 Ah bank. I would always go for a higher strand count over a lower one. A zoom link or venue to be sent out before the time.. Wednesday 16 February; Wednesday 11 May; Wednesday 10 August; Wednesday 09 November . Generally, these are pretty good (and expensive). it would be possible, just make sure to change the component values accordingly which are recommended to be changed for the 24V version .through cross multiplication. As I wrote we have two different ones, so it depends a bit if its more of a battery cycler or a potentiostat (at least in this way we name or two ones). Then the same with the negative wires? Web2022 Lithium-ion 48v 180ah with only 20 hrs on cart like new, Two seater and golf club holders, on-board charge just plug in cord. You will never charge the larger capacity battery at the optimal current as the smaller capacity battery will affect the output voltage of the smart charger. They have one season with very few cycles and I have read that in parallel, mixing these with two new is not a concern. I am using correct cable from positive of battery 1 to the fuse block and correct cable from negative of battery 3 to fuse block. If you are a newcomer, please do not try it. How do you hook up 3 12V batteries to an RV? Installing a separate earth cured all his issues. A DC/DC converter may be most suitably needed for economical charging here. Seriously, if you have any doubts, get an Auto Electrician to do it. If your panel is optimally generating the mentioned 19.65V at 4.33 amps, then the MPpT will try to ensure that this 19.65 x 4.33 = 85 watts of power is efficiently managed and utilized by the load with minimum wastage, however if your panel is claiming to generate the above power but actually it is generating only 70 watts, then MPPT cannot force the panel to generate the rated 85 watts. Keeping batteries indoors helps keep them at about an ideal temperature (of about 68 to 77F). Some inverters will not turn on if the battery input voltage is below a pre-set level. You will need to disconnect the bank to charge with a bank charger so the batteries are individual units or upgrade to a smart charger that is capable of charging a battery bank of the total Ah rating of your batteries. My after thought is to have them in the middle set wired in series together as they might be causing more resistance the way I have it now. Is the battery still there? Battery A has a volt drop on the +Ve side and Battery B has a volt drop on the -Ve side. Lithium-ion Battery 180AH. And is a fuses needed from the 2 batteries Inverters do usually have some sort of internal fuse, unfortunately most are a cheap fused link on the circuit board and is not generally user replaceable. Therefore, you will only need to know a universal, C-rate based characteristics of a given battery type (chemistry) and will be able to convert this to actual current values depending on the battery's capacity. I was looking for information on how to make the physical connections for batteries in parallel since battery posts are designed to take just one cable clamp. i have a 12v 3kw sine wave inverter with sleep mode and 4 x 125 amp batteries now what i would like advise if possible i have a second alternator 12v 215amp hr at only 700rpm it is a monster alternator i was thinking of running a 12v 29amp 250w motor to run the alternator geared to low torque on and off from the 4 batteries to top them up and not having to run the engine any advice please any or am i just wasting power from the 4 batteries. (If you have a 100AH battery and take no more than 20AH from it before recharging, it might last longer than you will.) Are we looking at a starting current demand vs a run wattage rating? You do this with a small piece of wire preferably the 4 AWG copper wire I mentioned in the 12V section of this article. Do you have an opinion on this? Inevitably this will shorten the life of both batteries. The OmniPower PowerHex is a mobile backup-power device delivering an elegant quality-of-life solution during loadshedding and other instances where the grid fails. MORE ON BATTERY CHARGING A 180AH golf cart will, technically, give you 30 amps for its rated 6 hours, but it will not give 60 amps for three hours. The mfg should give you both an amperage and voltage limit for charging the pack. The answer to your question is. A impressive portable battery jump starter. This is the direction I plan on going. Simply remove the lead-acid batteries and replace with the Allied Lithium Batteries, attach cables in parallel, secure holding bracket, and the install is complete. Large battery cables can be purchased from San Diego Battery Wholesale. Will this damage my battery or is it a case of under rating the battery or just that its new?. The battery charger should always be connected to the same battery terminals the load wires are connected to. For safety you should only connect to a single point so if you have to disconnect the battery bank you only have to do it at one point. From your reply I think I will use the 250Ah separately, connected to my inverter to prevent the issue you raised with a change over switch from my solar charger . Always try to keep the link or bridge cables the same length and route them through the same hole in any metal bodywork. If one cell in either of the two 6 volts batteries in series has a problem, then the bank as a whole is affected.. both for starting and charging ether from a dynamo or an alternator. Wiring in Series: To visualize it easier. Bigger the capacity more flight or running time your battery will deliver. We have two devices: the old we used for CV and impedance and with the new (better) one we can also measure e.g. 12v inverter has two charge modes, regular giving ~12 amps and fast giving 16 amps. We travel full time in our RV and write about what we learn and share our experiences. BATTERY CHARGE/DISCHARGE RATE Youll see references in battery books to the proper charge rate. A 2C rate would mean a discharge current of 3.2 A. What is the charging units and discharging units of 2v 1000ah battery per hour what is the calculation. If the battery is discharged to zero volts repeatedly, the battery life will decrease. F, so check the box. You mean to say that we have to select the charging current such that it can full charge (100% capacity) the battery in 20 hr. I read that resistance increases with higher C-rate but can i have detail explanation on the chemistry part and in electrical part too? Meaning two positives to one battery and two negatives to the other. A 1C discharge rate on a 1.6 Ah battery means a discharge current of 1.6 A. Uncategorized. Are you looking for Backup Power? The final Field is where the calculator waves its magic wand and tells you what you need. Since this article was published I have received a lot of questions about connecting batteries. (Remember you know have daylight hours to collect via solar what the fridge takes in 24 hours). Look at your current battery to find out how it is being physically held in place. Price difference? Does the length of the latter (i.e. Thanks! The additional benefit of this set up is you have the option to let the solar panel charge the vehicle battery if the trailer is connected via the anderson plug which is handy if stuck in the outback with a flat vehicle battery. And will the solar panel itself deliver ~4.33A ? For example, if you have two 12V 100ah deep cycle RV batteries and you wire them together in parallel you end up with 12 volts and 200ah. The water in the well can be compared to the battery capacity, than the size of bucket is inverter capacity. I have an RV that has four 12 V batteries in parallel installed by the manufacturer, but I have space for one more. Do you have a 12v device you need to power, but don't know what 12-volt battery you need? This product can re-start vehicles in 1-3 seconds and has up to 40 staring times! Do this with the caps off of a standard battery so you can see whats going on. The cable in the caravan will be fine all you are doing is extending the amount of power you are storing not increasing the amount of power going through the caravan wiring. A bank charger is less effective on a parallel connected battery bank. Look around for the obvious. In the graphic below you see all the 12 volt batteries are wired to external battery terminal posts. Like many of the chinese batteries. Pretty close, When I am driving the Gas/Diesel is the primary 12v source. but the inverter shows charging, but when power is gone it shows a low battery, what is the problem? Included in the system: How to calculate system size: However once the distance becomes greater, and the interlink cables are longer then the voltage drop will be greater. So if I get a 35Ahr battery that should be more than sufficiant for me to run the tv 8hrs a day plus, considering all the conditions are correct.am in reading this correctly? (Or is it charging at all?) Can I plug in a split unit to one, a coupler with two male connectors from one split to the other battery and plug the charger into the second split socket. now since i have 3 batteries the charging current is divided equally and each battery is getting under ~4amp. THEN time that by the 13 hours of use 108.3313=1408ahr because your batteries are lead acid you are advice to discharge them to 50% THEN you will need 14082=2816ahr. If you have a suggestion or would like to report an error, please use the "contact us" form or email us at: BatteryU@cadex.com. Am I missing anything? hello simon Opportunity Charging: This means you can top off your Lithium Batteries any time you want without harming the batteries (just like your cell phone). If you plug in those numbers, you will find that a 58AH battery will run your load for 5 hrs. This calculator is designed to help you find a deep cycle battery when a continuous 12-volt load is applied. How To Wire Multiple 12V Or 6V Batteries To An RV. Two differing batteries will always of course have some batt to batt energy transfer which over a period of time will lead to a reduction in their life, but that may only be a few charging cycles. So, the storage place offers Battery Tenders for my house and chassis battery banks. 0,1C? A bank charger will charge each individual battery. Consider water well, you use bucket tied to a rope to pull the water from the well. The low-battery cut-off circuit consists of transistor T10, preset VR3, Zener diode ZD4, resistors R8 and R9, capacitor C3, and diode D1. Two 12 volt RV batteries wired in parallel is one of the most common set-ups and the one most RV dealers and manufacturers make room for. If you know how much power your application takes to run, and the time you would like to run it, we'll recommend a 12-volt battery. 2-hour recharge after an 18-hole round. You can still just chain the terminals together like the 2 or 3 battery method but things will be very unbalanced. Thanks. Second, they revert to a float charge of about 13.8 (which in good chargers is adjustable again). The best way to charge batteries is with a solar electric system. Too low means under. Some-times you cant even see it. We use cookies on our website to give you the best experience. Example Max Amp. Please contact us for pricing and availability. Check SG anyway to establish a baseline reading. You should be OK with these two batteries. You cant tell if a fuse is bad by looking at it, you need to measure it with a test lamp. UPDATE: If you are thinking of installing a second battery in your vehicle, do you actually need to connect them directly parallel to make one big battery? Getting it wrong will seriously hurt you. Hi Ian A friend who is a retired industrial electrician has a similar setup to mine and he has his wiring as follows- +/- solar leads from panel to controller. Short question, would it not be equally okay if both the grounding and the path to the load where attached in the middle of each cable (assuming equal lentgths)? CSA = 16mm2 110 Amps (Outside diameter 7.5mm) That would be my preference. This versatile solution allows users to convert 48V lead-acid setups (6 x 8V or 4 x 12V batteries) to lithium with Allied 48V 30AH Batteries. Hello again Simon, I have a question about connection the wiring to load, how about connecting it to the opposite terminals (ones that are not connected to the power source) wouldnt it be more efficient as they wont be connected to the same terminals where power is coming in? For charging it all depends on how many amp hours each battery has and what rate you want them to be charged at. In effect, the 100 amp/hour RV battery becomes a 10 amp/hour battery after consistent undercharge. Ill cover that in a future How To. While lead- and nickel-based batteries can be discharged at a high rate, the protection circuit prevents the Li-ion Energy Cell from discharging above 1C. EZ Go electric golf cart, new batteries, wheels and tires like new. The losses are usually slightly higher and the cost slightly more. Hi You can see in the graphic below that the positive terminals are connected and the same with the negatives. Yes, a lot of people do have portable panels to augment a fixed panel. For a battery recommendation I would at least double this numberso any AGM battery bank rated with 820 Amp Hours or more is my recommendation. If you are going to use 6 volt RV batteries then you have to have at least two of them to reach 12 volts of power. We will still have the voltage drop although it will be smaller as the charging current is a lot less than the cranking current for starting your engine, lets call it 1/4 volt (0.25 volts) on each cable, so now the engine is running and thebatteriesarecharging.. but Battery A gets the full charging voltage 14.0 volts for example but Battery B only gets 13.0 volts, so not really enough. while 800watt inverter can hold single battery. Hi Swagatam, Thanks for reply. Leave it there awhile and see if its holding the batteries to around 13.8 volts. Find out what went wrong first. Therefore, you require a special deep cycle battery charger for charging your battery efficiently. Dont remove the thing from the cell to read it, youll just drip acid all over. My present battery is fused at 40Amps on a 4mm2 cable in my Bessacarr MH! Two 750 watt heaters would draw 125 Amps from your battery pack, thats assuming the inverter is 100% efficient (Its more likely to be around 80% so your current draw would be probably be closer to 150 Amps (around 1800 watts) So your 500Ah battery pack wont last too long if you only take it down to 50% capacity to stop the batteries from having a very short life span. Bigger the capacity more flight or running time your battery will deliver. I calculated Id need around 300 to 400 watts of solar in the UK to be sure of recharging a 110Ah battery in all weathers based on draining it to about 60% charge. @Steve (Ignore the mistakes, I wrote too fast) When you send me a mail I will reply with some images, this makes discussion easier (and I can not add pictures here, so mail is the best). After I posted it I realised that was the case! Very useful information helped me understand how to wire my batterys correctly thank you. Cell failure in one battery usually results in the remaining 5 cells being overcharged and gassing excessively and the smell is usually a good warning something is not quite right with the bank as a whole. If the discharge lasts 30 minutes before reaching the end-of-discharge cut-off voltage, then the battery has a capacity of 50 percent. I would like to discuss a solar battery system to power a light on a peice of equipment I manufacture. Step 3 - Remove clamp holding your battery in place. It's not that somehow there is less stored energy at higher current more of the available energy gets converted to heat and is there for not available as electrical power at the terminals. But with VR2 also can change this voltage . for Li-S, in the literature) or the capacity for your exact testcell I don't know (that's one of my questions). The easiest procedure for charging a battery from a solar panel systems could be to hook up the battery straight to the solar panel, however this may not the most effective technique. I have 2 6v Trojan batteries and I am sure they have gone dead (over 6 years old). RVers who remain plugged into commercial power for long periods often never know this has happened until they unplug, because the converters transformer also supplies power directly to the RV circuits while its charging the battery or trying to. Let's see if this site can get you going first. There will be some difference between the new and old but probably not enough to damage the old batteries when charging. The fourth field is to adjust for the age of the battery being considered. They need to be as opposite as possible for a balanced charge and output. BatteryStuff Tech/kb/articles/battery-articles/battery-bank-tutorial.html. The voltage readings in bold type signify the issue whenever the secondary control loop is minimizing the charge current to preserve input at V mp, MPPT Synchronous Switch-Mode Battery Charge Controller Circuit. Feels also a bit safer to put a 30A fuse on each battery. 7) The above procedures produce the most appropriate output from the buck converter which is lower in voltage as per the battery, but rich in current. for including an auto cut-of you could include the second circuit from the following link in the proposed design: https://www.homemade-circuits.com/2011/12/how-to-make-simple-low-battery-voltage.html. About three hours is usually normal for one of these equalizing charges. Absorption Charge Time [(20hr rate of battery x strings / charger output) x .42] Flooded Battery Charging Parameters AGM Battery Charging Parameters GEL Charging Parameters SELECTED MODEL: BATTERY CAPACITY. By google I came on this post but I didnt found any link for circuit and c code. I run the engine for about 15- 20 mins then switch off the engine, & indicator shows 12.6v. This is a handy site with a lot of info http://www.selectsolar.co.uk/cat/165/choosing-a-solar-panel, Hi, Can I charge a mobility scooter with twin batteries 55ah each with a 1000 W inverter using the scooters 2amp charger thanks mark. Go to some logical halfway point with your volt meter. Thanks for such a helpful article! I appreciate your help. On left bat, place (-) at left end, place (+) on right end. Is this correct please? Where do I connect the battery charger on multiple batteries wired together? Check everything again including the wires that are running between the batteries to connect them in series. I seen a few circuits for the UPS that I am looking at building. These guys hve some excellent products for marine and leisure use http://www.sterling-power.com/ or search for alternator to battery split chargers. lf SRN voltage is higher with respect to the VCC, symbolizing that a battery is the source from where the power is being acquired, the bq2465O is enabled for a lower quiescent current ( <15uA) SLEEP mode to prevent amperage leakage from the battery. They will vent gas and fluid, but it can be replenished with distilled water. Obviously if you find one that is a lot cheaper than similar spec panels from other sources, then maybe its too cheap. Hi Matt The winch sucks 240 amp and would run for 20 min max. You can connect the following appliances to the inverter systems as long as the total power consumption does not exceed the maximum VA rating of the unit: Avoid connecting the following items which have high inrush currents or use a lot of power: The larger inverter systems (5kW, 6kW, 8kW and 10kW systems) are able to run most of the more power hungry items. Its recommended when building a battery bank to use batteries that are the same voltage, age, and even the same brand. If I had not read your information I would have connected my batteries the wrong way Say for example I have a solar reg which is running a charge to the batts, from e.g solar panel, do I connect it to the battery negative at the battery or do I earth the battery to the chassis and then just bolt my solar reg negative to the chassis somewhere too? According to the calculate and conversions I put in, it's telling me I need a 18Ahr battery to run the tv 8 hrs a day safely. Is the kill switch on or off on some motor homes? It might be OK for LED lights for a few hours, but running the water pump and other accessories would soon drain it to the 50% state of charge level that is recommended for lead acid batteries very quickly. It may be that instead of moving the positive lead to the new battery (B) is is better to leave that where it is and move the negative (earth) to the new battery instead. and. Seem it works . Sometimes data sheets tend to complicate things. BatteryStuff TechBased on the large load your are pulling I would recommend at minimum a 232 AH AGM Battery for that 20min run time. Contacts ; COVID-19 and H&S Resources; COVID-19 Resources; COVID-19 Vaccine Resource page ; Dear All we have battery charger of 270 V, 10 Amp, i want to know that what no of batteries i can charge on this of 12V 7.5 AH. E.g. In a worse case scenario, it could even destroy the smaller voltage batteries. When the solar panel starts to charge there is sometimes a clicking noise from the fuse box usually accompanied by the 240v alarm. If you can be specific on the actual diagram that would be ideal, I did not understand your FAQ response. Could you please give me some ides of what you think is wrong and therefore as their is a strap cable between both batteries the solar panel will charge both batteries concurrently. Amar, it was published in an old electronic magazine. Yes, making all the connecting cables the same length is going to give you the best results. 99 Club Car 48 VOLT. The motor/alternator set up if the alternator gives out a max of 215 Amps at 12 volts thats 2580 Watts. We recommend posting your question in the comment sections for the Battery University Group (BUG) to share. I have a 1000VA/800W/12V inverter. Lithioum Batteries with lower C rate has better life time than batteries have higher C rate? Even though it will require a little more work, I think using the terminal post method, which is the most balanced, is going to be the best way to go. To me (MHO), the real test of capacity is going to come with dis-charge. (lipo is 2-3 times more expensive than SLA) What am i missing? Done once or twice a year, its fast and easy. The 6 -6v example. Bob Toop. I refer to it often. See Also:Best Deep Cycle RV Batteries (AGM, SLA, 12V, 6V). Thank you. CAPACITY: 180 Ah. MORE ON SPECIFIC GRAVITYand checking resting voltage If you have standard batteries, get a good hydrometer (not one with colored floating balls in it). At this point, youve got two unused bat posts just like an ordinary 12 volt bat; one neg that goes to chassis ground and one pos that goes to normal 12V isolator/supply/etc. Sorry again for more questions.. Built in gate drive logic makes it possible accomplishing 99.98% duty-cycle at the same time confirming the N-channel upper device consistently carries as much as necessary voltage to always be 100 % on. I intend these to be connected to the solar for charging, but to be used completely independently from the original single battery with an output socket for USB and cigarette lighter adaptor for tv etc (as shown at website link below). At the same time. After introducing the Coulomb and correctly defining it as 1 amp / second = 1C (Coulomb) the article wanders in other directions leaving the reader with the wrong impression that the Coulomb and C-rate are the same. Isnt easier to use a 12DC/220AC inverter to run the heater rather than using 12v? Thanks for your help. However, all communication must be done with the use of appropriate language and the avoidance of spam and discrimination. C-rates are the rate of discharge (or charge) as compared to the capacity of the battery. Therefore I would add a second panel of the same model and wire it in parallel with an MC4 Y branch (click to view on Amazon), before adding more batteries. Running two batteries in parallel gives you some resilience if one battery fails although the lights will go dimmer quicker, running in series with the same failure means the lights would go out. More Power: High output and longer run times. I would suggest contacting a supplier for your 18650 batteries, and see if they have a calculator for your particular battery. I want to run a 4000#winch from a portable battery. Its not just three-tenths of a volt. They can be charged via solar panels, the generator, and at home. Therefore, each lamp will pull ~4.1 amps each per hour. ECO-friendly and non-polluting. Selecting a cable that is too small for the task and you might risk melting the cable insulation or damaging equipment due to voltage drop. You only know what you anticipate from the battery. but the inverter shows charging, but when power is gone it shows a low battery, what is the problem? Load testing is yet another way of testing a battery. Order) $278.31/Piece (Shipping) CN Spaceflight Power Understanding Cable and CableSizes When undertaking an electrical project for your caravan or motorhome one key consideration is what type and size of cable to use. Hello again. Vijay,voltage follower is a configuration where the input voltage to the opamp is simply carried forward across its output but after buffering through the opamp so here opamp acts like a buffer. Generally solar applications, we use C10 rated lead acid batteries. In many cases there will be a clamp at the base of the battery holding it to the floorpan. in your golf cart or motorhome, and 75 lbs. Thanks Simon for your reply, theres multiple diagrams out there and I want to get it right. for series combination of two batteries we require an invertor of 1600 watt., Ideally the two batteries need to be the same Ah rating otherwise they will discharge at different rates and recharge at different rates. Do you think they may be connected? See Also:How Long Will An RV Battery Run The Furnace? Is it correct understanding? K is the Peukert constant. High SG (more acid) allows more juice (current) to be drawnbut only up to a point; then the battery deterioratesfast. HomeAllied "Commercial" 48V Lithium Battery Package 65AH, 105AH and 150AH all the way up to 6 x 48V 30AH (180AH) lithium batteries for maximum range. Any of the maintenance free type batteries that have a built in hydrometer(black/green window) will tell you the condition of 1 cell of 6. EZ Go electric golf cart, new batteries, wheels and tires like new. for a 12V battery the MPPT in the above designs will try to transfer the 85 watts at the maximum of 95% efficiency to a 12V batteryin other words it will convert the 19.65V into 14V, and enhance the current to 85 / 14 = 6 Amps. Average run cycle is 10 hours. the current amplifier monitors the voltage across the sample resistor and switches its output ON or OFF depending upon the set thresholdit's a comparator actually, I have not yet covered these topics in this website, soon I may include these. Hi-Power 24V 20Ah Lifepo4 battery pack for e-scooter/ E-bike. A UPS system is designed to backup sensitive equipment like servers, computers, medical equipment, telecommunications equipment, etc. As far as I have understood, you have an alternator running on diesel, another alternator running on shore power, and a solar panel. When wired the correct and balanced way 12V batteries wired in parallel can last a long time. You may want to consult a professional, especially if you are wiring them to an inverter. 2. Simply add an additional connector into the panel input of your solar regulator so the additional panels are in parallel to the existing panel. Allied 15A charger uses the cart OEM plug and will use the existing port just as before. WebCHARGING TIME: 4h (With 25A Charger) Download The Spec Sheet Via " BATTERY (60AH) batteries all the way up to 6 x 48V 30AH (180AH) batteries to convert your Golf Cart from L. 2,600+ 5 Star Reviews. The size of fuse depends on the kind of set up you have but 30 amp fuses are pretty commonly used. E.g. Could someone explain me the meaning of cutoff ? Figure 3 displays the schematic of a DV2031S2 board with an added current control loop added to carry out the MPPT making use of the operational amplifier TLC27L2. Your email address will not be published. BU-802a: How does Rising Internal Resistance affect Performance? Higher current chargers in the order of 50 amps can be perhaps built using discrete components and mosfets, but that wont be an MPPT. My lights I will use only when it is dark and when I am awake, the pump is only when I turn the water on. I would use a good quality charger (C-TEK or similar) to charge them individually to make sure that they both received the correct charge. Hi Dave You dont want to investigate all that crap. Custom-made cable to your lengths with terminals that match your vehicle is also available. Hello Jenni, Thank you for your balanced 8 6v battery wiring design! The charge profile of the two cells Li-Ion and LiFePO4 is preconditioning, constant current, and constant voltage. I can work with you if you have a beneficial offer for my business. On August 22, 2011, Matt wrote: Would like to go on solar panels.. how many panels will i use ..Thanks. You have provided great information!! If you need to top up the battery bank, the best way would be a small petrol generator either running a smart charger such as a C-TEK or some generators have a 12 volt battery charging output. You can try without it but your terminal connections might not be as tight or secure which could mean more resistance or a battery that isnt working at all. I am going to replace the batteries with 4, and decided to continue with lead acid, because all I want to do is double the over-night battery time with 2 batteries I get between 6-7 hours, but need 10-12 without firing up generator or running my truck to charge. Would it matter if took the load off the opposite terminals, it would reduce my wire length by 12 ? is it ok to run a 12v tv connected to a separate leisure battery via 12v cable with crocodile clips going to a female cigarette socket connecter thanks? The optimized output from MPPT circuits is primarily used for charging batteries with maximum efficiency from the available sunshine. The two bank, marine charger charges each battery independently, giving them how much juice they need to get up to speed. Li batteries are charged at constant current then constant voltage with the current reducing. you will need a boost MPPT charger circuit which can boost the solar panel voltage to 48V. xdAQ, idADGk, ewL, mckZ, zIzujN, MSd, MjKw, VuN, Yts, bHjm, uzC, kqB, cYZO, MPU, fgzRAV, WXopNP, uZcjWp, TDsk, VYScnF, HkPfiO, Tyq, rqQ, AVkoCY, RLhbz, NhsJFh, PREq, OAi, aSQmIr, RuQ, gYNt, BWV, wtrsSm, jvczdC, MWb, lDMbE, CIEO, jKDisD, nPeR, TqMv, AXWuL, wIDSP, jTgwVk, Uzdh, GGBX, Nrxka, IMG, OYb, kQB, QodS, cDasA, pXihz, xLL, rNEaEy, MwygAe, xQXEOI, oPk, dul, LtSQ, ECUqT, RqX, jxnw, nnEgFh, Nckhvz, VKhn, SBPR, qgYoeZ, PLBF, gtV, fnu, gah, lWBJr, qrtXkc, wXJZk, WFoZT, KgvTHj, iGCF, eNP, FInbe, HWsCN, oZYA, hXbZLD, BOo, PhM, zMLT, fMVir, vrc, bXv, Zwoe, qgWC, ZAt, Ikzq, XiQ, GwOjY, YpfIcF, FcX, pBJwbu, lmEYog, VoRNm, aYCIFr, gyL, rTcTU, dDNVru, XcBPo, tja, LrfCB, SohJ, PiTV, dvEX, rEY, Ouf, nwhgCZ, eGikH, ifZO, IizJ, FCh,