Yo Scott, I am wonder which utility company you have, and if or what the consequences were when ... they called you on feeding back to grid (if I understand your info. correctly) ... I would think if you feedback to grid where I live with PG&E in Northern California, that might produce a hassle like new building dept permitt requirements, and UL approved Grid Tie Equipment (but do not really know).
Easy words. I think it would likely cost too much to get a dependable option. If I ever saw a reasonably priced option ( ... have search/ and not found one. Do you have any web links?) ... I would consider reconfiguring my three LV2424s currently configured for 240vac split phase (w up to 40 amp ability on one leg/ 20 amp ability on other leg of my sub panel) .. INTO: three 120vac single phase LV2424 parallel configured for up to 60 amps output that I would put on both legs of my isolated from the grid sub panel. I could then use a 120/240V transformer /converter's output (needs to be USA 240 vac "split phase", and NOT European 220 vac) / to power up my 200 + yards of 14 AWG line to my 1/2 hp well pump that uses only 5 amps on each 240 vac hot wire. I have searched for such a transformer, and Not Yet Found an attractive option with reviews for dependability for that idea. If you have a web link to one you think worth looking at, ... please share the info.
This one has two, 120V windings and is rated 1kVA. So it should be able to take 2kVA from a 120V generator and deliver as 120/240VAC at 2 kVA to the stack of inverters. Unless it is limited by winding ampacity to half that current? "Max amps 31.5" so it's got to be at least 15A per winding, and kVA limit is magnetics. Maybe not as many watts as you want, in which case either live with it or look for larger. I got myself a 9000VA toroid for the same money.
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About $300 bucks delivered. (Like I said, cheaper than having someone write software.)
Avista here in WA installed a smart meter, then replaced it thinking it was defective. When they asked if I had anything feeding the grid, I said I would check my batter backup system (white lie). I turned off hybrid mode and went to off grid. Avista came by a few days later and dropped a note things were now good. I now turn it on occasionally when running the dryer or other large loads, but have set up the Pip in this thread’s original theme. When the Pip dies, I think the Sun limiting inverters might be the next thing I try. Maybe some proper affordable UL gear might be available by then?
Thank for info. inspiring me to research 120ac to 240vac split phase converstion transformers a little more. I noticed Outback and SMA transformer options that CAN really covert 120vac single phase to 240vac USA spec split phase in the $600 + category at quick glance. Seems hard for to find specifics on specs including their efficiency factor for that conversion (not so easy to find specs or prices). My initial research for a 120vac to 240vac split phase / combined with my DIY orientation to get the most bang for my dollars had me looking at Amazon's and eBay's much lower cost Transformers from and/or for Europe (and other country's single phase standards); transformers that only setup to single phase 208v or 220v or 240vac. That was initially kind of confusing for me. Those sellers of such lesser options are starting to clarify that their products are not for USA's 240ac split phase; and one might have to look in their questions sections to answer that question). I still wonder if there are any lower cost transformers in the $100 - $200 arena that could dependably convert 120vac to 240vac split phase that could maybe handle 1200 - 2000 watts or more (with some review reference to gauge their dependability)? I also wonder if Alibaba has any such low cost options (w reviews) ? If anyone knows of such a lower cost transformer, Please share the info. and any web link(s). ... Learning More All the Time :+)
I used drop-in Lion Energy batteries which has their BMS inside each. There are limitations that I understand you trying to address. It does feel a bit like we're bleeding edge and the kinks need to be worked out, with the next generation looking back wondering how we survived.
From what I've found, Mpp uses a scale of 22v=0%, 29v=100% and its not changeable, and is for all battery types, user defined is what is to be used for Lifepo4.
Thanks. That's the conclusion i came to as well. I just needed to be a little more patient with the unit. By the second day, it stopped its bulk charge and seems to be keeping the batteries within the specs i set, so all is well. I just basically ignore the percentage. If the middle green light is solid, the charge is complete. i confimred with my volt and amp meters, so I'm good at this point. Thanks for the help.
just glancing at thread here, while wonder what different versions MPP has for its 24v All In Ones. I have the LV2424 for 120vac or 240vac split phase output options. In "user defined" mode for battery charging myLiFePO4 battery bank, ... Bulk or Absorption Charge voltage; and then Float voltage, and well as cut off voltage CAN Be Set within certain available ranges. ... :+)
