diy solar

diy solar

Recent content by Master Dalor

  1. Master Dalor

    24v mppsolar unit wiring

    Hello capt. I don't know if he found out, but if I understand the question now, He wants to know the needed wire gauge. I=p/v 2700/110=~25amp. The fuse 30A is ok. If we follow the rules of 5A for 1 sqmm, 30/5=6 minimum witch is close to 9gauge cable. 12gauge is close to 3.3 sqmm, 15amp max or...
  2. Master Dalor

    Batteries Not Keeping Up

    Wow. I didn't thought the charge controller could only accept 260W at 12V. Better go 24V.
  3. Master Dalor

    Batteries Not Keeping Up

    Hello. 100w panel will produce about 5amps in the best conditions, during 1 hour, you get 5Ah. During 1 summer day, maybe you had 5h sun, 5days x 5hours x 5 ampères = 125Ah Now, with shadow/bad weather, maybe it produces less than 1amp, you should measure it with the ammeter. With 20A mppt...
  4. Master Dalor

    Recommended settings for a homemade ( out of 18650 used cells ) lithium ion battery 7S60P 135 Ah ( 24V )

    @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...
  5. Master Dalor

    Using 8S BMS on 7S Battery for a Trolling Motor

    Hello. I read your post again, I don't know how, I understood you couldn't find 7s bms. Sorry. I can't confirm your idea of using 8 s bms for 7s batteries, but it works with active balance bords 8s board for 7s batteries.
  6. Master Dalor

    Recommended settings for a homemade ( out of 18650 used cells ) lithium ion battery 7S60P 135 Ah ( 24V )

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

    DC to DC charger / battery compatibility

    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...
  8. Master Dalor

    DC to DC charger / battery compatibility

    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...
  9. Master Dalor

    DC to DC charger / battery compatibility

    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...
  10. Master Dalor

    how to modify a car alternator for 48v charging

    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%...
  11. Master Dalor

    Travel trailer - 24v battery - buck converter question

    Ah ok. Thanks, sorry, I must have missed posts, you know I'm a newbie in the forum. ;)
  12. Master Dalor

    how to modify a car alternator for 48v charging

    Hello efficient pv. Depending on the rpm, the alternator stator produces different variable voltage and frequency, the regulator energising the rotor winding modifies the magnetic field of the rotor. The magnetic field becomes weaker with higher rpm to keep stable voltage output. To use the 3...
  13. Master Dalor

    DC to DC charger / battery compatibility

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