SRGFTS SUMRY Solar Inverter Charger, 3600W DC 24V to AC 110V Hybrid Voltage Converter with 120A MPPT Charge Controller, Pure Sine Wave Power for Battery-Less or AGM Lithium Battery Home Energy System

Why this all‑in‑one stood out in my test rig

I set up the ECO‑LV 3.6kW inverter as a compact backbone for a 24 V system in a small outbuilding that often doubles as my testing ground. Right away, the appeal is obvious: it’s a single box that handles inversion (24 VDC to 110/120 VAC), solar charging via a built‑in 120 A MPPT, and a 100 A AC charger for top‑ups from grid or generator. For a modest off‑grid or backup install, fewer boxes, fewer points of failure, and simpler wiring are big wins.

Physically, the unit feels solid and purpose‑built. The DC lugs are appropriately beefy for a 24 V platform, the PV terminals accept high‑voltage strings, and the interface is the familiar LCD‑plus‑keypad combo found on many hybrid inverters in this class. Fans are thermally controlled; they’re audible under load but not obnoxious.

Setup and system design notes

• Battery: I ran it on a 24 V, 200 Ah LiFePO4 bank and briefly with a 24 V AGM bank. The menu makes it easy to set absorb/float voltages and current limits; lithium presets are close, but I still fine‑tuned.
• PV: I used two strings of 4× 400 W panels in series (per string), operating comfortably within the 60–500 V MPPT window. The PV input current is capped at 18 A, so think series‑heavy strings rather than big parallel combiner layouts.
• AC input: Tied to a small inverter generator and to grid at different points to exercise the 100 A charger and hybrid modes.
• Wiring: At 24 V, pulling real power means big DC currents. If you plan to approach 2–3 kW for any length of time, budget for stout cabling (I used 2/0) and an appropriate DC fuse/breaker near the battery.

The LCD is utilitarian but clear. You can set solar/battery/utility priorities, charging current caps, low cut‑off thresholds, and a few protections. There’s an optional Wi‑Fi module if you want app monitoring; it’s not included by default.

Solar performance and MPPT behavior

The MPPT tracked quickly and sensibly through the day. With roughly 3.2 kW of available PV at peak in my test array, I saw the unit allocate power in a predictable way:
- First to the loads,
- Then to battery charging (up to the 120 A cap on a 24 V bank),
- With excess curtailed if the batteries were full and loads were low.

High‑voltage PV input simplifies stringing, reduces combiner complexity, and keeps array current low—nice for long rooftop runs. Just be mindful that 4.2 kW is the listed PV ceiling and that the 18 A input spec means you should design strings to sit in the voltage sweet spot for your climate.

Batteryless mode actually works—within its limits

The batteryless feature is a genuine advantage for daytime‑only, “use‑it‑as‑you‑make‑it” scenarios. With my PV strings producing well above the 120 V minimum and sunny conditions, the inverter ran shop lights, a laptop, and a small fridge without a battery connected. However:
- If clouds rolled in fast and PV voltage sagged, the unit dropped the output as expected. There’s no energy buffer, so ride‑through depends entirely on the panels.
- For mixed clouds or intermittent loads, a small battery (even 24 V, 50–100 Ah) stabilizes the system dramatically.

If you want a low‑cost, battery‑light setup for daytime workshop use or to offset utility power, this mode is practical, but I wouldn’t plan on running heavier loads without at least a modest battery bank.

AC charger and hybrid behavior

The 100 A AC charger is a workhorse. On shore power or grid, it can top up a 24 V bank quickly. I appreciated that I could dial the charge current down; that’s crucial with small generators that can bog if you let the charger pull full tilt. In hybrid modes, the ECO‑LV can prioritize solar, then blend in grid or use the battery to cover peaks depending on your chosen profile. For backup use, setting utility as a fallback with solar‑first for charging strikes a good balance.

Output quality and load handling

The inverter’s pure sine output was clean on my scope and friendly to sensitive gear. AV equipment and test instruments behaved normally, and induction motors (well pumps, small tools) ran quietly. Where I hit some turbulence was on large inductive startup surges:
- A 10,000 BTU window AC with a conventional compressor occasionally tripped the inverter into a fault during startup, particularly if other loads were present.
- A mid‑sized microwave worked, but when combined with a fridge cycling on, I could provoke a fault.
- Heat tools (resistive loads) like a 1,500 W space heater are a non‑issue; they’re straightforward and predictable.

While the unit is rated 3,600 W continuous (7,200 W peak), real‑world handling of motor inrush seems more conservative. If your critical loads include big compressors or tools with hefty startup currents, plan for headroom or consider a soft‑start capacitor kit for AC units. In my experience, treating this as a comfortable 2,000–2,500 W inverter for mixed inductive loads yielded a fault‑free experience, whereas pushing near nameplate with challenging surges was hit‑or‑miss.

Thermal management and noise

Under sustained 1.5–2.5 kW output, temperatures stayed well‑managed and the fans cycled as expected. They’re audible in a quiet room but fade into the background in a utility space. I didn’t notice thermal throttling; the unit either powered the load or faulted due to surge events. Ventilation clearance is a must—don’t box it in.

Monitoring and controls

• The LCD gives you the essentials: input/output voltages, charge currents, mode, and fault codes.
• Settings are logical, though not deep compared to high‑end hybrids. Still, everything you need for sane operation is present.
• The optional Wi‑Fi dongle is worth it if you’re remote; on‑device logs are limited.

I’d love to see finer‑grained logging and better export options, but given the price class and all‑in‑one ambition, the basics are covered.

Reliability and protections

I intentionally staged overloads and short, spiky transitions. The inverter’s protections caught faults quickly and recovered cleanly after I cleared the condition. Over‑temperature and overcurrent handling feel well‑tuned. If you find yourself rebooting often to clear faults, it’s usually a sign that your load mix asks for either more surge headroom or better load sequencing.

What it’s great for

• A compact 24 V off‑grid or backup system where simplicity matters.
• Daytime solar use with optional battery‑light operation.
• Mixed household loads under ~2.5 kW continuous, especially resistive and electronics.
• Fast battery charging via grid/generator with adjustable current.
• Users who want configurable priorities (solar first, battery first, or utility assist) without a steep learning curve.

What to watch out for

• Large inductive surges can trip it. Soft‑start kits or load staggering help; otherwise consider a unit with more surge capability if AC compressors are a must.
• At 24 V, high power equals high current. Budget for heavy cables, solid lugs, and proper DC protection.
• Batteryless mode requires PV voltage over 120 V and consistent irradiance for stable output.
• Monitoring is basic unless you add the Wi‑Fi module.
• This is a 120 V‑only solution; no native split‑phase output.

Recommendation

I recommend the ECO‑LV 3.6kW for small to mid‑size 24 V systems where you want one box to do most of the work: clean 120 V output, a capable high‑voltage MPPT, and a stout AC charger with sensible priority modes. It’s a particularly good fit for workshops, cabins, and home backup circuits focused on lighting, electronics, refrigeration, and other modest loads, with the bonus that it can run in a batteryless, solar‑only mode during sunny hours.

I wouldn’t choose it as the heart of a system intended to start and run larger inductive loads (big window ACs, large compressors) unless you plan for soft‑starts and keep total load well below the nameplate. In that specific use case, stepping up in capacity—or moving to a higher‑voltage battery platform—will make life easier.

For most practical off‑grid and backup scenarios in its class, though, the ECO‑LV strikes a smart balance of capability, configurability, and cost, and it performed reliably for me once I matched it with the right load profile and wiring.