Hello Everyone from the Colorado Rockies ! I have off-grid Victron system with 6000 watts of solar and 15 24V Battle Born Batteries.

Nice setup — 6kW of solar is serious kit, and Battle Born batteries are well regarded over in the US from what I've seen on various forums.

Quite different to what most of us are running here in the UK. I've got a modest Victron system across a shepherd's hut and garden office — nowhere near your scale, but the Victron ecosystem is brilliant regardless of system size. The MPPT controllers and Cerbo GX make monitoring genuinely enjoyable rather than a chore.

Curious how you find the performance through Colorado winters at altitude? I imagine snow coverage on the panels is your main headache rather than the low sun angles we suffer from here from October through February. We lose so much generation in winter that most of us end up oversizing battery storage just to get through cloudy spells.

A few questions if you don't mind:

• Are all 15 batteries wired in parallel at 24V, or have you done any series/parallel configuration?
• What inverter are you running — MultiPlus or Quattro?
• Any grid backup at all, or fully island mode?

The off-grid community here tends to be working with much tighter budgets and smaller footprints — garden offices, boats, campervans — so it's genuinely interesting to see what a properly scaled residential system looks like. We tend to lean on Fogstar for lithium cells and Renogy for budget panels, though anyone serious eventually ends up deep in the Victron rabbit hole like the rest of us.

Welcome aboard — always good to have international perspectives on here, especially from somewhere with proper sunshine.

@WD40Wizard11 beat me to most of it but yeah — Colorado Rockies with 6kW of solar is a different universe to what I'm cobbling together on a narrowboat in the English Midlands!

I'm running a very humble Victron setup with some Fogstar cells, perpetually arguing with clouds. The Battle Born vs Fogstar/EVE cell debate is one I find fascinating — you lot in the US seem to go big or go home with your battery banks.

6000 watts though... I've genuinely had months where I'd have killed for that. Last February my van conversion system nearly gave up entirely because the sun disappeared for about three weeks solid.

Would love to hear more about your setup — what's your daily consumption looking like out there? And are you on-grid backup at all or fully islanded?

Mate, 6kW of solar in Colorado and I'm sat in a static caravan in [Location] arguing with a single Fogstar 200Ah whether it fancies working below 10°C — living the dream! 🏕️

Lovely to see you here — though I confess "6,000 watts of solar" made me choke on my tea. I'm nursing 320W on a narrowboat in Somerset, spending half my winter convinced the panels are merely decorative.

Those 15 Battle Borns are doing roughly what I dream about when I eye up the Victron app at 6am and watch my single 200Ah Fogstar whimper under a 40W load.

Do bear in mind you'll find the conversations here rather... meteorologically humbled. Colorado apparently gets something called "sunshine" — a concept we treat as mythology between October and March.

Genuinely curious though: how does your Victron system handle the altitude? I've read that temperature swings at elevation can be interesting for battery chemistry. What MPPT controllers are you running with that array?

Ha, welcome aboard! That's a cracking system you've got there. I had to double-check those battery numbers — 15 Battle Borns at 24V is some serious storage capacity. Victron is popular here too, so you'll fit right in on that front at least.

I'm curious how you find the solar harvest through a Colorado winter at altitude — I imagine the snow clearing off panels must be a regular chore? We moan about our grey skies here but at least we're not scrambling up a ladder in a blizzard!

As @ExmoorNomad says, your setup does put some of ours to shame a bit, but it's all relative to what you need and where you are. Stick around — always good to have someone with a high-power Victron setup to ask questions of! 🙂

Fantastic setup — Colorado must give you solar irradiance figures we can only dream about here. I run a fairly modest system on my boat, mostly focused on emergency backup, so I'm always interested in what a properly sized system looks like at scale.

One thing I'd genuinely love to know: how are you handling battery management across 15 units? Victron's DVCC with multiple banks can get interesting. I've found the Victron ecosystem brilliant for monitoring but it rewards careful configuration — are you running a Cerbo GX to tie everything together?

Also curious whether you're grid-tied at all or fully off-grid year-round. Colorado winters at altitude must throw some challenging low-sun days at you despite the generally excellent climate for solar.

Curious about your winter setup — do the Rockies throw much snow shading at those panels? I'm trying to figure out panel angles on my narrowboat where low sun angles in winter are already a real headache, never mind snow load.

Also wondering how you're monitoring everything — Victron's GX system? I've been looking at the Cerbo GX for my own setup but can't quite justify the cost yet when I'm only running a modest 400W array and a couple of Fogstar lithium cells.

Would love to know what inverter/charger you're running with that kind of battery bank — presumably a MultiPlus-II or something in the Quattro range?