Most reacted posts

Yes, I just told about that in another post, I saw a video from victron where they burn a big alternator directly charging a lithium battery at engine idle speed, it burns because there is not enough cooling at low speed, there are systems managing the current pull to charge the utility battery...

The second battery will disconnect if starting battery is under 12.7 V with traditional alternator, 11.5V with smart alternator witch is connected to the controller with communication cable, so, the 50amps are given by the starting battery, not overloading the alternator.

Well If you drive at noon in the desert, maybe you should put something on the pannels to cast a shadow, that will drastically reduce the power, and maybe also protect the pannels from to much heat, they don't like too much it seems. If you more batteries in parallel, they will accept more amp...

Sure I used round number for easy calculation, and pointing the fact that the amps are divided, but I can also calculate 57.6V divided by 14,4V, man, it's also 4 times, how can that be? hehehe :D

yes good idea, but the victron friend told its ok, once the voltage is set, for other brands it could be useful. I also think alot about losses when the power source is limited, any little gain added to other little gain can make the difference at the end. I pacticed that in computer tunning...

Ok, it pulled 51 Amps, but from a battle born which as no voltage sag, the lead acid starting battery will sag, and will rapidly get under 12.7V especially just after engine starting not being sucked off see at 4:10 the charge will resume from 13.2V. In the test he says that the charger senses...

Another solution to use thinner cables is to start with more volts from the pv. Because the loss in the line is counted in volts per meter, so if you must go 10 meters away with 12V and you loose 1v per meter ( It's not that much in reality for example only) you end with 2V. If you start with...

It makes some sense, he just read the description like we did first, having no other information.

Pps: one last thing, with one eye closed, I don't go more than 24V , with my 6 x 100 W panels, I could get 72V, but on mobile systems, there could be shadows when it's impossible to find the best place to park, with all panels in series only one panel in the shadow means, no more production...

Ok. It will be fine. Thank you, Miles, I've learned some more things, and thank you Joey, for digging, and make me dig too. See you.

Hello. The renogy site says: Maximum Charging Current : 50A (25A Alternator / 25A PV) amp outdoors says: Nominal Voltage: 12V Nominal Capacity: 60AH Discharge Cut-Off: 10V Charge Cut-Off: 14.65V Charge Current: 50A Max Cont. Discharge: 50A Peak Discharge: 80A But there are always lost amp in...

Hello. You could use a dc to dc boost converter. Of course, if you go from 12v to 48v , it is 4 times more, so you must divide your amps by 4. If it was 12V 100 Amps, At 48V, 25Amps. with the dc to dc 80% efficiency 25Amps x 0.8 = 20 Amps. Also, the alternator needs a 12V battery to excite the...

Sure lost volts. sorry, thank you for the correction. ;) Anyways there is always something lost somewhere. :)

As you said, if it's advisable to connect the car battery to both in, battery and solar, witch I'm not sure it is, it would most likely go to 50 amps, and the solar side wouldn't recognize the 12.7 volt low battery state, and maybe kill it and the alternator aslo, instead, you could go thru a...

I will use that in my van.

on here it states 25 amps from alternator

I can't see any model number, when I receive it, I'll tell you.

Hello. I half agree, because even double amp alternator still need enough rpm to cool down, I'm not in boat engines, but I suppose it's sometimes at idle rpm, and you'll need to limit your amp draw to the power the alternator can give at idle to not smoke, that's not much divided by 4 and 90%...

just a crazy idea, you could use 4 12V alternators powering 4 12V batteries in series, but each one must be isolated from the ground and from each others. On YouTube Julian Illet tries that with 18650 cells and usb single cell chargers, among many other interesting ideas, also small dc to dc...

@Pindrix I found An example: Design and manufacture by Yousun Overcharge Detection Voltage: 4.200V Overcharge Release Voltage: 4.170V Cell-balancing Detection Voltage: 4.160V Cell-balancing Release Voltage: 4.150V Overdischarge Detection Voltage: 2.800V Overdischarge Release Voltage: 3.00V...

No problem. :) I might add that the small converter 0.5v 30v has built in diodes to not feed the current back in, in the case, later if you want to charge batteries directy with it. You can add diodes on the 3806, but than the voltage reading wouldn't be accurate on his screen, because of the...

Hello Ernie. Your mpp solar is meant to charge a battery, all the loads are connected on the battery too, if they are 24V DC. Too power the 110V AC loads, you need to transform 24V DC with the use of a pure sine inverter. You need to size the complete installation to match the power needed by...

Hello. If you can almost make it through the weekend with 100W pannel and 100Ah battery, maybe flooded lead acid, or agm, witch will give at most 50Ah. Your installation could be ok. It means that your new system will give you 18 times the solar power, and 3 to 10 times battery autonomy...

I just read renogy's response again, I'm not sure what he means saying it charges 50% in the starting battery and 50% in the house battery, but, it makes me think that the pv should recharge also the starting battery, and maybe there could be a conflict somewhere, when the starting battery is...

Hello. Do you intend to keep those deep cycle baterries or to replace them with the 24V 280Ah lifepo4 battery bank? Is your 24V 12V dc to dc converter meant to power the loads or to charge another battery? It seems that in the actual configuration the legacy distribution panel is directly...

Ok sorry.

Hello. I = P/V = 200W/60V = 3.333333 Amp only. 200W/12V = 16,666666 Amp. If you use a bathroom light interrupter (shema 2 bipolar) it is 2 interrupters in one, cutting the 2 wires (phases here in europe) exists for 20Amp. You connect the solar pannels + on one phase, the corresponding...

Hi all. I found that illustration, on https://lygte-info.dk/info/BatteryLowVoltage UK.html, very interesting page. Are your cells new?

Hello. would it be something like this? https://www.enfsolar.com/pv/storage-system-datasheet/865