Do you have a battery monitor instrument
You can get a cheap yellow tester but a battery monitor will tell you what it’s putting out.
you have some reading to do....we all were there once have no fear
Do you have a shunt that measures the amount of amps that are draining out or charging into the battery? If so, continue with the voltage tests. If not, there is no way the charger could do an optimal job.I know the unit works, but I was wondering if it's charging them optimally/fully or not.
Ok i just did this. Reading of 13 on each of the house batteries after running some things. Switched on the battery charger and then got a reading of about 13.55 on each one. Check 5-10 min later, and it was 13.75.Let's start with working at all (not necessarily well). Get a cheap multimeter. Run the battery on a load for a bit with some lights or other loads in the boat and the charger off and no other charging source. Measure the voltage at the battery terminals. It should be 12. something. Then turn on the charger. Measure the voltage. Should go up to 13. or 14. something. If it does not, it remains the same, the charger is not working at all. The next step is understanding bulk, float, and all that stuff, but try this first to see if the charger is working at all. I suspect that's the OP question. Good luck.
I dont think it was when I was charging...I think it was before. Not sure though, but it was pretty warm.You know your charger is on, but it may even read a higher voltage after another 15-30 mins. First stage charging is Bulk, which puts as many amps in as it can, until voltage rises to Absorb level (you may have caught it in the middle of this process), then it maintains that Absorb voltage and sends whatever amps the bank will accept. When those accepted amps decline to a certain level, it changes voltage again, to Float voltage, which is lower than Absorb. Cheap 3 stage charges just move from Absorb to Float after a set amount of time, which is almost never right.
If one battery is warming up, while charging, you could start a fire. Abort.
If you can see the top of the lead plates they are too low. It is not just covering the plates although that is very important it is also about keeping the fluids up so the concentrations of ions are correct or something like that. Don't charge them until the water levels are correct. Chances are your batteries are bad but charging them while fluids are low or on a crappy charger won't help them out any. Even crapped out batteries will likely solve your Low Batt message once charged. The problem is how long will the batteries keep a charge.Pulled one out, checked the water levels. They weren't very low, could see the top of the lead parts, but wasn't nearly as parched as the starting battery was. The car battery charger says it's 80%, so I'm going to bring it to 100% (and then do the other), and see if the Low Batt message on my VH radio goes away when I hook them back up.
Then, with two fully charged house batteries, if I still get low battery message, I'll know either these batts are compromised somehow, there's a problem with my Charles charger, or there's a problem in the wiring. Right?
My car battery charging unit keeps saying 14.4 V... them amps initially read 10, then it kept calling. Now, as it charges it says 6.1 amps, 5.9 amps, back n forth. I'll check back on it in a bit. Actually now it's saying 5.4 amps. Why is it going down?
Thanks for this post. This is exactly what I want to do. I want to make it my own, including a rewire, thought that may take some time.Your CS 27 is a nice boat for what you decided you wanted for your family. It will serve you well . It would be a great place to make memories S well as really venture into sailing life.
You are going to spend lots of time trying to chase rabbits down a hole following the philosophy , “ if you’ve been satisfied with status quo of what you’ve got “ why improve your situation and buy new stuff. Some people like to be campers on a boat. No value judgement, I like to feel comfortable and not forgo creature comforts. It’s also has made it easy to entice my wife and others to join in. We have cooking facilities, a head with shower, good reliable batteries and a system to charge them. I though this was the direction you too were headed, but you are in the beginning stages of outfitting her. My suggestions were to read and learn and IMPROVE what you bought and have found. I don’t want to see you waste your money unnecessarily and think you goals through as well as learn about the specifics.
Others use their boats differently. Again no value judgement. Some are minimalists and try and get by with spending or having the minimum requirements. That can be because they are that or their boats are used on lakes or smaller bodies of water which don’t require as extensive accommodations or creature comforts.
Having refrigeration, etc requires power. What you have Currently won’t fit the bill. Your CS now, Is someone else’s stuff and fits what they wanted in their sailing profile. I am suggesting you make it yours. you have the opportunity to build your own solid electrical system for the boat which will allow you to Outfit her so you can have creature comforts ( refrigeration) , electronics, comfort for charging phone I pod and laptops. Only you can decide what you expect and how you will use the boat. And inevitably whether your family will love it or leave it.
Diddling around with cheap camping battery testers, chasing what you already know.....( the batteries are suspect and not the best deep cycle kind) and don’t fit you increasing or future needs. Don’t get distracted on wiring , as that has to be brought up to standards for this to work, but that’s such a simple fix. Reading up on how to wire and the type to use , the connectors etc . Your are chasing down someone else’s hard to understands antiquated power solution. Make your CS your own so you don’t have to continually worry about it.
It’s simple....adequate house bank....starting battery, and the two methods to charge them. 3 stage shore power charger, and either alternator or solar. A monitor to check on them by a glance. Even if the batteries you are trying to reclaim work temporarily, you’ll never trust them till you replace them. Have you looked to see how old they are? There is a date on them somewhere. If you either put a new charger or found out if the Charles fits the bill you still need batteries. Your car charger is dangerous , and is the WRONG way to charge deep cycle batteries. Others who have expertise have told you that in addition to me.
I’m still not sure why you don’t just start this over. You’ll not have to worry about old batteries, old charger, wrong charger, . You’ll look at a monitor built for you system which is relatively inexpensive and in one glance know the charge on the battery bank, if the charger is working correctly, and how much power you have left to use.
I thought you were serious in improving what you have and learning about electrics so as to not waste money and match your systems components. The beauty of SN is there are all types of boats. Small, medium and large.Boats to camp on, boats to overnight on, boats to take extended trips on, boats to live full time on. The suggestions you’ll get from SN members including me usually reflect how you use your own boat.
Be very careful about statements which have authoritarian must in them, like you must use 10 gauge wire. That’s simply not true. The is a difference between opinion and fact. On Haleakula I have a soft briefcase with lots of spools of different gauges of wire. 12 years ago I re- wired the whole boat from bow to stern , top of the mast to control panel.
I got the advice of a marine electrician on batteries, wire, connectors, how to splice, how to build corrosion resistant attachments etc. I did this when I noticed on my mast when the removed it one year, there was lamp wire in it. That’s how the manufacturer a very reputable one (C&C) Did it. After I spent the time to re-wire , one piece at a time over a year, it was up to current standards. I knew all connections were solid. I knew I had a reliable large power system and a way to monitor and recharge it to make Haleakula fun to travel on, and fun for my wife too.