Search results

Looking at ways to pass the 120% rule. Need to get to 40 amps or less and the Growatt 9k-18kPV does that with 38amps AC out. Larger two are 42 and 48 amps. Is an 18kPV inverter enough for 15-17kPV of panel's any over production? Will it just clip with planned east west split helping? Worst...

Looking at breaker change for 120% rule. With 200a feed, what determines a panel's amps - manufacture label, main breaker, volume for larger wires? Is code OK with changing a 200a panel's 200a main to 225a main breaker, or do I need a 225a panel? I assume you can change a 200a panel to a...

Learning more about 120% rule and load vs line. Where does the ability to tap line side end - at first ocpd? One of my meter feeds is external to an adjacent 200a disconnect (Q22200NRB). Does the 200a CB inside the disconnect make it an ocpd? Would changing to a knife style disconnect allow...

Running wire for new breaker panel in building where solar is going. Attached 200a panel connects directly to the meter through a disconnect. The lower right pair of breakers feed 100a to the shop/solar building. A supply side taps with four double entry, four hole polaris using Hedges idea...

Discussing grid tied inverters and AC amps out, Hedges wrote about the 120% rule and breaker choices. Liking the Growatt 11.4 grid tied, 48 amps AC out means an existing 200a breaker needs to be changed. My meter has three lugs wired to three 200a panels. One 200a panel connects to a 100a sub...

Want ~14-15k, 32 to 40 400W panels, on a building distant, but fed, from the meter. Utility (net zero) said grid tied easily approved but hybrid required $$ meter changes, batteries and transfer switch 'near' the meter, not in a separate building. Noted that only two of the 30 or so nearby...

R type trapezoidal metal roof, 5 degree slope. Started with the S-5 Rib 3 thinking 4 screws into the trapezoid's sides added shear strength vs another mount screwed to the top of the trapezoid. Looking at my metal purlins, I now wonder if a Versa guard or any L foot screwed to a purlin might...

Until a week ago I was fixed on hybrid with batteries later. A Utility pre inspection approved grid tied, as is, vs a $6K electrical prep estimate for hybrid. Had planned on a S-A 15 or the EG4 18kPV so the world of grid tied options is new. A hybrid installation estimate last year, for 48...

My meter panel with three 200 amp outputs complicates CT location. The local utility came by and said the meter's third 200amp leg, with its existing disconnect, would be approved for solar if a disconnect was added at the building where I want solar panels. I had planned on a hybrid inverter...

Utility wants a disconnect switch, no problem except my meter has three outputs. OK, find a 400 amp disconnect panel big enough to add dual three lugs out. Just talked with an electrician and he said a transfer switch is also needed to switch from grid to inverter source. With the grid...

STC is a nice set of fixed conditions but how many reach those levels in real life? Inverter limits state Watts and Amps but not if they are STC, NMOT, or NOCT values. The newer M10, 44" wide, panels exceed the EG4-18 MBBT 25a limit and the S-A 15 26a dual string limit if the STC value. The...

If panels, inverter, and batteries at an out building 200 ft from the meter, what current does the CT carry and what size wire for the distance? Out building has a sub panel with little load. 1997 house has two adjacent main 200a panels fed by four load wires directly behind the meter...

NNC has wire on sale. I need a 1/0 to 3/0 underground run and debating how much extra to order. Would I use this size anywhere else - battery connection/rack?

I want to replace a 100 amp sub panel, its #4AWG feed, and the 1 1/4" under ground conduit. A 200 amp panel, for S-A 15 or EG4 18, requires 3/0 THHN copper (225a) or 4/0 XHHW aluminum (205a) and larger conduit. Shorter to dig new trench than replace the old conduit though a large oak sits over...

First step in adding solar is replacing a small 35 year old sub CB panel. Currently has a pair of (original)125 amp CBs feeding 14 slots. This panel connects, with #4 AWG THWN-2 wires, 75' underground to a pair of 100 amp breakers in a 200 amp main panel. With a Sol Ark 15 AC out at 62.5...

I want to add 14K of panels and inverter to a 50'x60' metal building that is 150' from the utility meter. Original owners started with an apartment in the building so it has a small 125 amp CB panel and under ground power line. House was added ten years later, closer to the street, and the...