can two of these be hooked to one 12v battery for faster charging and does it make sense
1832902
Yes; in full sun one of these 15w panel will produce well over 800 milli amps close to 1 amp. 2 panels like these will double the charge rate and so on. My one panel easily maintains and keeps two 105 amp hour 12v deep cycle flooded batteries fully charge to over 12.6v month after month with about 6-8 hrs of full sun.
1832903
No. Two panels on one battery will not work. Waste of money only one panel needed if using as a maintance charger. If looking at using as a power supply to a cabin this is not the setup you will want. Would need larger panel and controller for that purpose. This unit is strictly a 1.25 amp charger for maintaining a battery in storage. Like my old beat up pickup that is used once or twice a month and sets outside all the time. Keeps the battery in top shape and counter acts the lite drain of the factory radio and computer in modern vehicle.
1832904
You may need a regular battery charger with instant start mode. I have one of those too, but I prefer the battery tender even if it takes longer, if I can wait. I also have the Tender unit w/a solar panel trickle charging one of my boat's batteries right now. Pete
1832905
No.The circuitry is designed to look at the battery conditions (voltage, current draw etc.) and another charger in parallel would confuse that.If you need more power, you need to buy a larger charger or get multiple solar panels and feed those into Delran's separate solar controller.
1220634
You could have them both connected to the same battery. Each has its own controller. I do not know if you can wire them for any configuration other than 12v....
1039869
it's best to work in pairs. ie if you have 4 batteries, put 2 on one side, and 2 on the other. This allows faster charging as there's a fixed amount of current available on each side, so balancing the load when you have less than a full load will charge faster. Batteries are in correctly when charging icon blinks, complete when all bars steady. That's about it, unless you want all the legal don't do stuff (dont stand in water and operate device, and so on)
433009
You can do either of the two. You can charge one single battery, or charge two batteries simultaneously. It does not matter at all.
1889035
I just called Deltran (the company that makes these) and they said it is not intended to charge more than one battery because the charging circuit will only detect the charge condition of the first battery it is connected to, and so any other battery connected in parallel may not get fully charged.
887419
I would advise against running it in a two batteries to one panel setup. If one battery went bad it could/will cause the loss of the other battery. The charging controller in this unit is meant to work in a one to one relationship to a single battery. Properly wired it could possibly work as a temporary solution. Is it advised? No. Eventually there will be a massive failure when one battery in the circuit has problems and an overcharge hits the remaining good battery. I would suggest a Battery Tender 022-0165-DL-WH. This is a dual battery charger but is not solar powered.
1205646
Sure, but are your needs for 12V or 48V? If 12V, tap power from two of your 6V batteries.
1927798
The Idea is that you use one battery while the other is charging. Then, when your in use battery runs out (or low) - swap the batteries. It takes about 3 seconds. Having two chargers would be silly.
1051501
Yes, but the answer is not as simple as connecting the batteries in parallel. Because each battery has slightly different capacity and internal resistance, over time, you will get uneven charges between them. The charge controller will stop charging once one of the batteries gets full, leaving the other not-fully changed. The result is reduced capacity, that is, you will not get twice the capacity of individual battery. The solution is to insert battery balancer between controller and batteries. See this wiki page. http://en.wikipedia.org/wiki/Battery_balancing
409920
Probably not the best idea. You could run the 12v unit off the connectors on one battery but that imbalance could shorten the life of the two batteries since they won't automatically balance. Best options - get a separate 12 volt battery for the inverter, or the company makes a 24 volt inverter. I've been very happt so far with the 12 volt model. It powers the coffee brewer and microwave oven in my RV just fine. Jim
1263777
I don't know where you got this info, but the high capacity chargers for both devices are rated at 5VDC, 2.1A. So NO. And, if you charge at a faster rate the battery will fry!
287861
Absolutely, if you wire up the appropriate 12V battery with the current capacity you need for the target runtime. It would be a relatively trivial hack to do if you want to, but is it designed to do so? No.
443897
The way I've done it is just plug a USB cord into each of the two ports. One USB is a higher charging power than the other. I've had good luck charging two things at once.
1136674
You can connect two of these to your battery but I don't recommend charging the battery and using the USB at the same time.
1615006
These inverters are commonly used with multiple 12 v. batteries. They need to be wired in parallel --pos to pos, neg to neg. This creates a "bigger" 12 v. battery, but the voltage at the terminals is still approx. 12 volts. With this configuration multiple batteries will charge at the same time. ALWAYS use identical batteries of the same age/capacity as one bad battery spoils the bunch.
1510325
You would have to put 4 batteries in series and all would have to be in about the same condition--not an optimal method. you would be better off putting two 6 volt batteries in series on a 12V charger
340684
Generally this charger is set to deal with one battery at a time but the charge is generally quick depending on the type of battery you are trying to charge.. I would not recommend that you charge more than one at a time.