Renogy 48V 3500W SOLAR INVERTER CHARGER

Been eyeing this unit up for a while tbh. The spec sheet looks decent on paper — built-in MPPT, passthrough, the usual — but I've not seen many real-world installs with it yet, especially in the UK where our solar conditions are a bit... optimistic at best 😅

My current setup on the narrowboat is Victron based and I wouldn't swap that out, but I'm building out a cabin system and I'm genuinely tempted by the Renogy as a cheaper all-in-one option rather than piecing together separate components.

A few things I'd want to know before committing:

• How does the MPPT actually perform compared to a standalone Victron SmartSolar?
• Fan noise — anyone running this in an enclosed space?
• Comms/monitoring — the Renogy app has a sketchy reputation, does it actually work reliably?

The price point is attractive, no question. But I've been burned before buying budget kit that looked great until it didn't, and replacing an inverter-charger mid-season is a proper pain.

Anyone running this on a static setup or boat? Would love to hear from people who've had it through a full winter rather than just a shiny new install post. UK-specific experiences especially welcome — grid hookup behaviour at a marina, that sort of thing.

@Tango I ran a similar all-in-one unit on the boat for about eight months before ripping it out. The problem isn't what these things do on a sunny Wednesday — it's what they do at 2am in November when the inverter side throws a fault and takes your MPPT and your charger down with it. Single point of failure on a narrowboat in a dark marina is no joke.

The Renogy ecosystem is fine for caravans and sheds where you can just walk away and reset things. For anything live-aboard, I'd be looking at separating the functions — even a modest Victron Multiplus paired with a standalone MPPT gives you far more graceful fault handling.

What's your actual use case? That changes the answer quite a bit.

@DorsetCamper's post got cut off but I can guess where it's going — the "problem isn't what it says on the tin" conversation we've had about a dozen times on here.

My take: Renogy all-in-ones tend to be fine until they're not. Support is the real gamble. If something goes wrong 18 months in, you're dealing with a company that's essentially a Chinese manufacturer with a western-facing website.

Victron separates (MPPT + Multiplus) cost more upfront but you'll actually get firmware updates and proper community support. On my shepherd's hut build I went that route and haven't regretted it.

That said — what's your actual load profile and budget? If it's a seasonal shed build with modest draw, the Renogy might be perfectly adequate. Horses for courses.

@ExPostie you're probably both heading toward the same conclusion I'd land on — all-in-ones are a compromise, full stop.

I've got a Victron Multiplus-II paired with a separate SmartSolar on the boat and yes, it cost more up front, but when the MPPT developed a fault on a mate's all-in-one last summer he lost everything at once. No charging, no inversion, no passthrough. Sat in a marina for a week waiting for a replacement unit.

That's the bit Renogy's spec sheet won't mention. With separates you replace the broken component. With an all-in-one you replace the whole box.

The 3500W rating also needs scrutinising — is that continuous or peak? Because on 48V those numbers can be... creative. Worth digging into the actual datasheet rather than the Amazon listing.

@ExBrickie is right but let's be specific about why this particular unit concerns me.

That Renogy's MPPT is rated at 80A input — fine in theory — but the charge controller, inverter, and charger all share the same thermal envelope. On a warm summer afternoon when you actually need the solar, you'll find it throttling. I've seen this pattern repeatedly with integrated units.

My shepherd's hut runs separate Victron components precisely because when the MPPT throws a fault, the inverter keeps going. With an all-in-one, everything goes dark simultaneously.

Also worth noting: UK installer support for Renogy is essentially non-existent compared to Victron's distribution network. When something fails — and it will — you're posting to a forum at midnight rather than ringing a local dealer.

The price delta between this and a properly spec'd Victron MultiPlus setup narrows considerably once you factor in longevity.

@SolarJunkie go on then, finish the thought — what's the MPPT rating and why does it concern you specifically?

From my own experience, the MPPT being integrated into an all-in-one is fine until it isn't — and when it goes wrong, you're replacing the whole unit rather than just a standalone controller. Had a Victron SmartSolar fail on me last year, swapped it out in an afternoon. Can't do that with a combined unit.

That said, I'd not dismiss this Renogy outright. The price point is genuinely appealing if your setup isn't too complex.

Main questions I'd want answered before buying:

• UK warranty support — Renogy's after-sales here is patchy
• Firmware update history — are they actually maintaining it?
• Comms protocols — does it talk to anything useful or is it a closed ecosystem?