ECO-WORTHY 3500W 48V Off-Grid All-in-One Inverter
SVT Score, Mid
A 3,500 W, 120 V all-in-one off-grid inverter charger with an 80 A MPPT controller limited to 145 V of PV input, a 40 A AC charger and parallel stacking up to 6 units.
$500
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Usability
3.6 out of 10At 3,500 W continuous it sits on the 3,500 to 4,999 W rung for a 48 V all-in-one, so it scores 3 on capacity.
Better on capacityECO-WORTHY Liber 6kP Inverter$789.99Scores 7.0ECO-WORTHY rates its efficiency at 92 percent on the spec table and 91 percent in inverter mode in the manual, and publishes no no-load draw (its 50 W power-saving figure is a load threshold, not an idle draw), so the 91 percent is scored alone, capped at 6, and it scores 6 on efficiency.
Its spec table gives a 6,000 W peak, 1.7 times its continuous rating, against 7,000 W in the product page's description, and the lower figure is scored, so it scores 3 on operating range.
Better on operating rangeECO-WORTHY Liber 6kP Inverter12,000 W peak is 2.0 times its continuous rating. $789.99Scores 5.0It has a built-in MPPT controller, a 10 ms typical transfer by the manual, parallel operation of up to 6 units, RS485 communication with a matched battery's BMS, app monitoring through ECO-WORTHY's plug-in Wi-Fi module and a 40 A AC charger, 160 A at 12 V-equivalent, but one unit puts out 120 V only, so it scores 8 on features.
Eco-Worthy's manual claims a cETL mark to UL 1741 and CSA C22.2 No. 107.1, but Intertek's directory has no record for the ECO3500W(SR), so it scores 2 on verification.
Better on verificationECO-WORTHY 5000W All-in-One InverterIntertek's directory lists this inverter. $759.99Scores 8.0ECO-WORTHY's warranty table gives inverter-chargers 1 year and does not list this model under its 2-year all-in-one inverter policy, so it scores 1 on warranty and support.
Eco-Worthy's warranty page gives most products 1 year and its 12 and 24 V batteries 3 years, for the original buyer only, against 10 years on its 48 V server-rack and PowerMega batteries and 2 years on its all-in-one inverters, both tiered by age.
Better on warranty & supportLiTime 48V 5kW All-in-One InverterLiTime's product page gives it a 2-year warranty. $699.99Scores 3.0$499.99 at eco-worthy.com.
Small cabin AIO, low PV voltage
The ECO3500W(SR) is ECO-WORTHY's 48 V all-in-one off-grid inverter charger, a 3,500 W, 120 V pure sine wave inverter with an 80 A MPPT controller and a 40 A AC charger for cabins, sheds and critical-load backup.
It suits a buyer who wants a low-cost 120 V all-in-one for a small off-grid building, and who will not need more than 145 V of PV open-circuit voltage or a warranty beyond 1 year.
Strengths
- Up to 6 units in parallel for 21 kW
- 10 ms typical transferper the manual
- 80 A MPPT4,400 W max PV input
- RS485 BMS link with selectable battery protocols
- Four charging modesincluding solar-only and hybrid
Drawbacks
- 145 V max PV Voc and a 60-115 V MPPT range
- One unit puts out 120 V onlypage text says 120V/240V split phase
- Spec table gives 6,000 W peakpage text says 7,000 W surge
- No published no-load draw
- 1-year warranty for inverter-chargers
Specs
- CapacityNot applicable
- AC Output3,000-3,999 W
- System Voltage48 V
- Panel PowerNot applicable
- Charge Current40-49 A
- Safety ListingClaimed only
- Cell TypeNot applicable
- Low-Temp ChargingNot applicable
- Warranty1 Year
- MonitoringWired display or port only
- Weight23.1 lb
At a glance
- 16.8 x 12.7 x 4.9 in case
- USB and dry-contact ports
- In 5.12 kWh bundle $1,299.99
ECO-WORTHY is the brand of Xiamen Eco-Sources Technology Co., Ltd of Xiamen, China, which its own pages date to 2007, with a US company, Eco-Sources USA, Inc., in Springfield, Missouri.
It sells direct from eco-worthy.com, which ships US orders from a US warehouse, and through its Amazon and eBay stores and dealers such as Off Grid Stores and Current Connected.
The ECO-WORTHY ECO3500W(SR) (store SKU L03SRUS3.5KWYTJ-1) is a 48 V all-in-one off-grid inverter charger: 3,500 W continuous pure sine wave output at 120 VAC, 6,000 W peak on the spec table (the page description says 7,000 W surge), 92% efficiency on the spec table and 91% in inverter mode by the manual, and a 10 ms typical transfer between bypass and inverter. Solar input is an 80 A MPPT controller rated 4,400 W, with a 145 V maximum open-circuit voltage, a 60-145 V operating range and a 60-115 V MPPT range. AC input is 110/120 VAC (90-140 VAC) with a 40 A bypass breaker; the AC charger is rated 40 A, with up to 120 A of combined AC and solar charging by the manual. It runs a 48 V battery (40-60 V), lead-acid or lithium, with RS485 BMS communication, a USB port, a dry-contact relay and parallel ports for up to 6 units; app monitoring runs through ECO-WORTHY's RS485 Wi-Fi/GPRS module, which the manual calls optional. It measures 426 x 322 x 124 mm (16.8 x 12.7 x 4.9 in) and weighs 10.5 kg (23.1 lb). In the box: the inverter and its accessories. It is also sold in ECO-WORTHY's 5.12 kWh Home Backup bundle ($1,299.99).
Questions answered from our data
Is ECO-WORTHY good?We list 20 ECO-WORTHY products and score 19 of them. Their overall scores run from 4.0 to 6.6, with a median of 5.6, against a median of 5.5 for all 127 products we score.
How much does an off-grid inverter cost?The 9 off grid inverters we list run from $500 to $3,800, with a median of $760.
Are off-grid inverters UL listed?One of the 9 off grid inverters we list carries a UL 1741-type listing we could look up by model.
Which off-grid inverters give 3,000 W or more?Nine of the 9 off grid inverters we list are rated for 3,000 W or more, continuous.
