Recent content by Lookaflyingdonkey

thanks @sunshine_eggo I will give it a go when I head upstate next week, I would apply remotely but if it doesn't come back online for some reason its a LONG drive to head up to resolve it :ROFLMAO: That SoC chart is actually coming out of the BMS, so should be "accurate", I will have to do a...

That makes sense, it is effectively saying to stop charging short of 100% and then just "trickle charge" the remaining 5-10%, effectively keeping the PV turned on and supplying the majority of the power to the inverter. Solar hits around 2kw peak and probably 1.5kw average while it is bulk...

48v LiFePO4 (Lishen Cellls with overkill BMS) Absorption voltage is set to 55.2v with an Absorption Time of 2 minutes Charge Cycle is set to 2 stage (No Float) By ReBulk do you mean Recharge voltage? I have 55.2v set for my Bulk and 51v set for recharge

I have installed a Conext MPPT 80 600 and the SW 4048 at an offgrid cabin and it has been working well after a couple tweaks, I recently setup monitoring as I was seeing the battery run down overnight when I wouldn't have expected it to. From the graphs it looks like once the battery is charged...

Anyone have any thoughts on the bifacial panels? They worth it or more of a gimmick? We will get a fair bit of snow so solar reflection in those months may help

Ah k, I did see in the manual the warning about not pulling the fuse when under load as it will go boom ?

Makes sense you want to protect the underground wiring too, that would be an expensive replacement! I think that combiner has a. knockout on both sides, so makes sense that's there the arrester would go. I was going to do breakers, but they only have 150 and 300vdc versions and say you need to...

I think you do need the combox to get the monitoring, it looks like the attached image, can see flow direction and energy going between all the components, also does datalogging so I assume you can review historical. I suppose I should be able to monitor in/out from battery in the BMS too, as...

Was there a reason for not using the monitoring in the Conext system to get those values? Or just looking for a second opinion on them? Conext software should be able to get power in/out of all the components right? Good idea with the DC circuit too, may be worth trying to run some of the gear...

Ah nice! Good to see someone who has one in use and it was worth the extra $$ Looks like a very neat install, I see the lightning arresters there too, will have to add those to the shopping list. Are those current meters (blue screens between the SCC and Inverter)? Also what is that coming...

Also wondering @Horsefly what you used for the switchgear? Did you use the official Conext AC/DC enclosures? The Midnite Solar E-Panel? Or just built it out yourself? The official switchgear looks nice and straight forward, but pretty pricey. Midnite one is good too as it’s all in one, but not...

I’m thinking the higher voltage SCC may be the way to go, with #6 there is plenty of room to expand (higher number in series and additional strings in parallel), with what seems like similar upfront cost given the price of copper. The panels are undersized for the battery capacity too so may...

Thanks for the run down, good to know the math behind the magic calculator! The property is upstate NY so gets down pretty low, I think it would push it above the 150v limit of the smaller SCC. Knowing that would you think it is better to spend the extra money on bigger wire or a bigger SCC...

Ah k, that'll do it. So if I recalculate at 40.8v @ 10.66A per panel, so 82V @ 10.66A per string, 82V @ 33A for the 2s3p it is #0 for 2% loss and #2 for 3% loss. Either way #2 or #0 are significantly more expensive right? So I could spend the difference in wire cost and go up to the 80A 600v...

Hi Horsefly, I was using 49.1 voc and 11.38A Isc per panel, so ~100v @ 12A per string, then 100v @ 36A for the 2s3p setup. Running 100v @ 36A through the renogy calculator (https://www.renogy.com/calculators#tab_solar-cable) with 2% loss for 200' came out at #0. Am I not supposed to add the...