Eco-Worthy OFF GRID INVERTER (ECO-INVCHA-48V5KWHRX01) Connect AC IN

Been looking at this unit for my static caravan setup and I keep coming back to the same question — what's the actual point of the AC IN on these hybrid-style inverters if you're genuinely trying to stay off-grid?

I get that it's there as a fallback, but connecting it to a generator feels like it defeats the purpose somewhat unless you're only doing it occasionally during a bad winter stretch. My current setup runs Victron kit so I'm used to having proper grid/generator integration done well, and I worry these Eco-Worthy units are a bit vague on how they handle the AC IN switchover logic.

A few things I'd love to know from anyone who's actually got one running:

• Does it prioritise solar properly before pulling from AC IN, or does it default to AC IN the moment it's available?
• What's the transfer time like? Some cheaper inverters take long enough to cause issues with sensitive equipment
• Can you actually configure the AC IN acceptance voltage/frequency range, or is it fixed?

The price point is tempting, especially compared to what Victron or even a Growatt equivalent would set you back. But I've been burned before buying budget kit that looked fine on paper and then had firmware that was basically abandoned six months after purchase.

Anyone running this alongside Fogstar or similar lithium batteries? Curious whether the charge profile is actually configurable or if you're stuck with whatever the factory programmed in.

@CharlieStevens85 the AC IN is essentially your fallback grid/genny connection — when your battery drops below a set threshold, the inverter automatically pulls from AC IN to either passthrough power to your loads or charge the bank, depending on how you've configured it.

On my setup I've got a small petrol generator wired into the AC IN purely as emergency backup. Most of the year it doesn't even start, but it's there if we get a run of grim Welsh weather and the panels aren't cutting it.

The "hybrid" label is a bit misleading for off-gridders — it's really designed for grid-tied-with-backup scenarios. If you're genuinely off-grid, AC IN might just sit unused 90% of the time, which is fine. Worth checking the transfer relay specs though — some cheaper units have a noticeable switchover delay.

@CharlieStevens85 Think of AC IN as the inverter's "I've given up on renewable idealism" port — basically where you plug shame in the form of grid electricity when your batteries have thrown a strop at 2am in November.

On my static caravan setup I've got the AC IN connected to a small genny as emergency backup. The

@CharlieStevens85 on mine the AC IN is dead useful for EV charging — I set the battery priority threshold high enough that the inverter only pulls from grid/genny when I've got decent charge headroom. Means I'm not hammering the pack just to top up the car.

Also worth knowing you can often set a charge current limit on the AC IN side, so if you're running a small genny you're not overloading it. The Victron units do this brilliantly but even budget inverters like this Eco-Worthy usually have that setting buried in the menus somewhere.

Basically AC IN = controlled backup, not defeat. Use it on your terms.

@CharlieStevens85 genuine question — has anyone actually tested what happens with these Eco-Worthy units when you're running a generator on AC IN and the genny cuts out mid-charge? On my Victron Multiplus setup the transfer time is near-instant, but I've heard these cheaper units can have a noticeable gap that'll upset anything sensitive plugged in. That's my main hesitation with the budget hybrid inverters for backup scenarios. What's the transfer time spec on this one — does Eco-Worthy even publish that figure anywhere? Can't find it on their site. For a garden office with a NAS or desktop PC running off it, that switchover lag actually matters quite a bit.