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Hi, for my sanity sake please do help me confirm the correct order of actions for my packs. It's 3 packs of 16 cells each, on custom made stainless steel rack, shelves made of Cetris (essentially sawdust and concrete), end plates made from 15mm (1/2 inch-ish) Pertinax (FR-2? in the US?) with...

Hi, I have another "the local bigshots are suggesting something and I don't quite believe them" question: I've bought a lot of 550Wp DAH panels a few months back for my own use and mounted them quite successfully on my roofs. These panels are quite big (89 inches tall 45 inches wide) but since...

Please recommend me a nice AC charger for my LiFePO4 48V pack. No Victron. Alibaba links welcome. 30A minimum. Doesn't have to be very smart or anything.

This is more "solar panel" talk but since it's intrinsically linked to residential solar (since this is a non issue on free standing panels IMHO). There is A LOT of discussion going off in EU solar groups which focus mainly on roof mounted systems about "panels overheating". Especially now when...

What are everyone's favorite DC-DC step-downs for the 40-58.4V range and let's say 30W/50W/100W/150W/200W ranges? Normally I would go with MeanWell as I always do but for the love of god I can't get my hands on many of the models (I use them at work and have really really good prices but they...

Anyone has any idea what's the torque spec on these rails? I've googled 130 in-lbs (15 Nm) but when tightened to 130 in-lbs (15 Nm) the rail got severely damaged. Everything is ok at 90 in-lbs (10 Nm). The wall thickness of this paticular rail is only 3/64 inch (1.2mm). I've retested it again on...

Anyone running any TBB Power inverters? They seem very nice. Pic below is the Kinergier Pro.

Hi, could someone please review the DC (panel to charger) side of this roof install of mine? It consists of 36 DAH DHM-72X10 550W panels connected in 3S3P configuration to 4 Tracer 10420AN MPPT charger controllers. Each series connected string is fused with 20A (below max spec but above max Isc)...

Hi, what's the downside of running an AIO as an hybrid off-grid inverter (aka a simple inverter/charger)? Since most of my stuff will be DC-DC I would like to turn off the inverters completely when they aren't needed but nowadays almost everything has MPPT included. Will it cause problems?

Anyone has any experience with this Alibaba seller? I've been messaging several sellers about off-grid inverters (but ones with AC charging feature aka "hybrid" ones) and this one can speak perfect English, their shipping makes sense, they can provide manuals datasheets and respond very quickly...

Hi, anyone has "grid assist" Victron Multiplus setup without ESS/external HW? It should be possible to set it up with "Self-consumption hub-1" but no matter how I set it up I can't seem to be able to force it to draw from both the grid and the battery at once. Is that really impossible to do...

Hi, I've seen post on this form along the lines "well Voltronic is the OEM and then there are tiers of rebranded inverters with MPP Solar being "tier 1" as in the highest quality rebrands and other brands being lower tiers. Is there a definitive list of those? I can get the MPP Solar inverters...

What do you all think about this contraption I've come up with? It's a concrete roof tile made for solar water collectors repurposed for solar panels. Each row is around 45' long with one tile every 3'. Each tile is fastened with two Ø 5/16 washer head screws directly to the rafters. The black...

Hi, anyone with an off-grid workshop? What 3-phase inverters are you running? I've got 3 Victron Multiplus 24/5000 inverters but wonder if there is a better way to set things up (I haven't even unpacked them yet so I can resell them no problem).

Hi, with the recent expansion of my off-grid system I will have enough power to fast charge my EV. At the moment I'm using a bank of 8S LiFePO4 cells with a single phase Victron 5000VA inverter then the OEM Mitsubishi AC 230V (I'm in Europe) 3kW charger to charge my car. Is it possible to get...

Hi, I'm building a few packs all from Grade A brand new cells from Amy that are very closely matched: Quantity Configuration Individual cell capacity Are these packs connected together in parallel? 2 pcs 1P16S 280Ah Yes 1 pcs 2P8S 110Ah No 7 pcs 1P8S 280Ah Yes All pack...

I'm tripling my offgrid system since I bought an EV and I need solar panels in bulk. Is there a reputable Chinese seller (something like Amy for lifepo4) that can ship panels in bulk?

Hi, anyone got any tips on a good and tried Alibaba suplier who can supply about 100pcs of 1S3P 18500 li-ion packs from grade A cells?

Hi, I'm expanding my system and I need about 40 300-ish Ah cells. Years ago I've bought some Winston cells locally here in Europe and while they are still kicking strong the price of about 450-500 USD per cell is just too much. The 280Ah cells from "Shenzhen Luyuan Technology" from "Mrs. Wan...