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  1. cisumma

    MPP VOLTS and poor performance

    How much power do these lights use? 100w of light would cost you 2.4kwh per day Actually, all the lights are in a 12 volts 3p 400 ah battery bank powered by a 300 watt harbor freight system and a 24 step down regulator that has maintained a 14 volt charge for several years now. I hope to get...
  2. cisumma

    MPP VOLTS and poor performance

    Hello, all; I am trying to understand watts and volts from a 2,2 kw, 2s3p PV array energizing MPP that maintains a 400 AH ,24 volt battery pack. First, I have a emergency low light ( trailer taillights) system to illuminate 6 rooms. Additionally, I have a dozen bright LED lights...
  3. cisumma

    MPP VOLTS and poor performance

    That's good to know. To coin a phrase " the future will be much brighter". Right now I have the MPP utility charging throughout the night; so, I start each day with 27.8 +- . I appreciate you evaluation. It confirms that the system is working according to the terrible conditions. I think that...
  4. cisumma

    MPP VOLTS and poor performance

    Yep. I'm lucky to have any output. When the neighbors trees are gone I will set a footing and kick those panels out a little and the numbers should be 100 times better. Thanks again.
  5. cisumma

    MPP VOLTS and poor performance

    Lol, overpanelling is an understatement. That's good news. I won't condemn the panels yet. Soon , ($$$ dependent) I will kick those panels out and soon the neighbors trees will be totally gone. Then I will repeat a second MPP and put a couple kw on the roof; but, for now , your right lol...
  6. cisumma

    MPP VOLTS and poor performance

    I will show pictures that will explain the poor paneling. The next move is to put them on the flat roof. But , the outputs seem way low; but, the winter angle does help. Now the MPP is utility charging throughout the night ; but even with the panels a averaging a out 60 v through out the day...
  7. cisumma

    MPP VOLTS and poor performance

    Question: I have 3 strings and each and I have never seen the PV volts at the MPP ever go above 80 volts total. First , the three strings are in a definite " temporary overpanling " setup; meaning, lots of trees and panels are perpendicular; but, the sun is low for winter and all the panels...
  8. cisumma

    Mpp and lock rotor amps

    Thanks for all the feedback. It is sounding like extension cords and power strips are the norm for AC output; so , I will run a power strip for smaller loads and wire in a separate output plug to energize the 1 amp refrigerator; unless having 2@ AC outputs from the inverter is a bad thing...
  9. cisumma

    Mpp and lock rotor amps

    I just have always learned not to run fridge on a extension chord and I have seen those power strips catch fire.
  10. cisumma

    Mpp and lock rotor amps

    Interesting DC current inverter stuff. I am not clear on the difference between The use of vac when it comes to talking about volts; so, I would assume I could fuse the wire for the frig to protect the wire if the compressor locks up; and, I guess that the inverter surge system will have to...
  11. cisumma

    Mpp and lock rotor amps

    Lock rotor amps. I am writing today to explore options concerning the " all in one mpp" Although, my ac output is minimal right now it is set up to run off of a metal bus bar;And, it runs a radio, chargers and small loads. Now, I have not tried to run a 1 amp fridge; but, it may...
  12. cisumma

    AC Input/Output setup

    Right, I don't need to mess with the service ; not yet anyway and, when and if that time comes I will have to get an electrician because grid tie and subpanel issues are unforgiving if not totally sound. Correct, a split phase 120 /240 inverter is most likely code ; and, that is probably how...
  13. cisumma

    PV panels and grounding rods vs warerline ground

    Grounding my PV panels. I am bonding and grounding my panels to a indoor waterline. Is this sufficient? My decision to ground to a waterline over ground to an outside ground rod was based on some research that swayed me to believe that an outside ground may be effected by nearby...
  14. cisumma

    AC Input/Output setup

    Thanks, MichaelK; Your explanation is logical ; again, thank you. If I decide to run the MPP out put to a breaker panel I would ground to a waterline. However, sharing a neutral of a this L1 out put with a second MPP out put to create a L2 in this panel is still questionable do...
  15. cisumma

    AC Input/Output setup

    Lol, impressive; not sure what you have there. I was just starting to work with output for the allinone mpp so I might use the power strip method; however, I have seen those explode into flames. Ideally, I am under the impression that I could use every other breaker on a old panel by...
  16. cisumma

    AC Input/Output setup

    Thanks, Is it possible to energize a totally off grid double phase panel with L1 only? And would that create every other breaker available to protect circuits? It would seem nice to send my inverter single phase to one side of a panel to localize and protect a few circuits. So,From my...
  17. cisumma

    Testing PV when MPP reads 0 V and 0WATT

    Thanks: yep, bad connection. At the panel it reads 80 v +- 3; but, the MPP is reading 40 +- . That's weird? 80 ft. Of 10awg & 30 amp fuse. Real Quick, now the testing begins. Are there any hazards if I begin plugging loads into a surge protecting power strip [ ex: radios, amp, piano , a...
  18. cisumma

    Testing PV when MPP reads 0 V and 0WATT

    Set up the MPP and connected first string of PV: 2s1p , 48.7 v and 355 watts each panel. Am I missing something? MPP shows no v and no watts. Granted, it is my first time using MC4 connectors; and I did not get voltage readings off of each panel prior to install; my bad. The crimping is...
  19. cisumma

    Testing PV when MPP reads 0 V and 0WATT

    Set up the MPP and connected first string of PV: 2s1p , 48.7 v and 355 watts each panel. Am I missing something? MPP shows no v and no watts. Granted, it is my first time using MC4 connectors; and I did not get voltage readings off of each panel prior to install; my bad. The crimping is...
  20. cisumma

    Fusing 2 panels in series

    I have 10 awg homerun fused with 30 amp fuse on a string homerun from panel to controller mpp . The two panels in series are 2@ 355 watt, 48 v ,9.06 amp paneles in series. Is an additional fuse needed at the panels to protect 9.06 amp? Thanks
  21. cisumma

    Watt hour relationship

    Thanks so much, now I have to find a ground mount rack. I ve been calling " Unbound solar "; but, they don't want to call back. I guess I could get 2 inch service 40 steel and electricion steel and put one together. Thanks again.
  22. cisumma

    Watt hour relationship

    Thanks , I will have to digest this info. In the real world I am temporarily attempting to hook up two panels temporarily, I need to maintain the battery because grid power is of [ as part of my savings plan, go figure ,right?] I have 6 panels all together and my goal is to have basic...
  23. cisumma

    Watt hour relationship

    So, 5400wh/115w = 46.9565217391h , and that doesn't sound reasonable. Also, I have 120v ,12 amp chest freezer. 120v*12a=1440w ; and, 5400wh/ 1440w= 3.75 h this is possible I suppose but I am not sure; because, during the day I will have roughly 3.3 hrs of peak sunlight and at least 10 hrs...
  24. cisumma

    Watt hour relationship

    The frig says 115v at 1 amp and the panels are rated at 48.7 v at 9.06 amps Incidentally, the battery bank is 450 amp hours; so, 450/2 gets me 225 ah Actually, I come up with 28.3125 amps. I was trying to fuse the 10awg homerun to a 30 amp fuse. At some point I ended out with 32 amps...
  25. cisumma

    Watt hour relationship

    I need to run a 115 watt hour fridge in a 450 ah 24 volt lead acid AGM vmaxtank battery; and, the two 355 watt PV rated in series at 110 v and 32 amps Can this be possible? I have yet to learn the watt hour relationship. Thanks
  26. cisumma

    Battery bank : lead acid

    I like 2awg because the setup is at the moment will need the positive and negative to be 3' long. Thanks,
  27. cisumma

    24v battery bank charges 12v battery bank

    Can a 24v battery bank charge a 12v battery bank?
  28. cisumma

    Battery bank : lead acid

    How does one calculate the fuse needed to fuse a 5 foot 4awg positive wire from the MPPT to the 24 v battery bank? I have 6 PV panels and I will run them in as 2s3p. The 3 strings feeding the MPPT will max out at 32 amps each ? So, does that mean I have an input of 96 amps ? I have...
  29. cisumma

    Battery bank : lead acid

    Well it seems to be under the glass. I will have to contact san-tan. The are new and under warranty so I will have to deal with it. I dont have the MPPT Yet. Are hybrids anygood? I want the all in one system but I think they will out of stock by friday:(. So, I will have time to mess with the...
  30. cisumma

    Battery bank : lead acid

    I got some panels in today. One of them had a blotch of rusty corrosion under the glass. Do you think it will cause problems? Thanks
  31. cisumma

    Battery bank : lead acid

    Lol, I will have to focus on discharge and charge rate and try to wrap my head around that c rate of the vmaxtank. Anyway. Thanks, I would probably just use the deep freeze and throw a couple bags of ice in it on a hot pull down.
  32. cisumma

    Battery bank : lead acid

    I am still waiting for my PV panels to arrive. I was wondering about what you think of a 2 kw PV system and a 24v 4s2p 450 ah bank trying to run emergency DC light in 6 rooms a d also trying to keep a deep freeze on chill ( 120v 12 amps) and possibly a 115v, 1 amp refrigerator running...
  33. cisumma

    Battery bank : lead acid

    Good luck with the install and congratulations on the upgrade. Those Li-ion BMS systems are very impressive. At the same time it looks like a wiring nightmare. Nothing to complicated you just cant get your wires crossed. I took a look at the BMS Setup, very nice! This might help ya...
  34. cisumma

    Battery bank : lead acid

    Thanks again. Guess what. I have decided to go to 24 v and wire the whole sh*t show to this animal: MPP and a few other manufacturers now sell a "complete off grid system in a box" that has: AC Inverter Solar Charge Controller AC Battery Charger Automatic Transfer Switch (if grid power is...
  35. cisumma

    Battery bank : lead acid

    I hate to mention it; however, I have 3@ harbor freight 100watt plug and play systems hooked up for a couple years now charging to a 1200+- ah battery bank and I have lights in 6 rooms and my controllers ar pegged at 13.2v. I can't explain this. Granted I have 2200watts of PV arriving today...
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