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SunWell Energy

1.5kW 12V Solar Off-grid Inverter

1.5kW 12V Solar Off-grid Inverter

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Model

The SW-1.5KW-12V is a 1.5kW off-grid solar inverter for homes and sites without reliable grid access. It delivers clean pure sine wave AC power from solar panels and a 12V battery, and its built-in MPPT charger keeps the battery topped up from the array. Weighing just 3.5kg, it is easy to install in cabins, RVs, and remote setups.

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1.5kW 12V Solar Off-grid Inverter — Technical Specifications
MODELSW-SYP1.5KW-12V
AC Input
Rated Input Voltage208Vac / 220Vac / 230Vac / 240Vac, L + N + PE
Voltage Range90~280Vac±3 (normal mode); 170~280Vac±3 (UPS mode)
Frequency (Hz)50Hz / 60Hz (Auto Adaptive)
AC Output
Rated Capacity1.5kW
Surge Power2.4kVA
Voltage208Vac / 220Vac / 230Vac / 240Vac
Power Factor (PF)1
Frequency50Hz / 60Hz (Auto Adaptive)
Switch Time10ms (normal mode); 10ms(UPS mode)
Wave FormPure Sine Wave
Overload Capacity (Battery Mode)60@102%~110%load; 105@110%~130%load; 3@130%~150%load; 0.2@≥150%load
Max. Efficiency (Battery Mode)90%@12Vdc
Parallel QuantityNA
Charger (PV / AC)
Solar Charger TypeMPPT
MPPT input current / Input Power18A / 800W
MPPT Range/Operating Voltage17~115Vdc
Max.PV Open Circuit Voltage115Vdc
Max.PV Charge Current50A
Max.AC Charge Current50A
Max.Charge Current (PV + AC)100A
Battery
Rated Voltage12Vdc
Battery TypeLithium and Lead-acid
Interface
HMILCD
InterfaceNA
MonitoringNA
General Data
Ingress ProtectionIP21
Operating Temperature-10°C ~ 60 °C
Relative Humidity5% ~ 95% (Non-condensing)
Storage Temperature-15°C ~ 60 °C
Net Weight3.5kg
Gross Weight3.9kg
Product Dimension (W×D×H)320×100×227mm
Max.Operating Altitude4000m (Derating above 1000m)

Features

  • Standalone Off-Grid Power — Operating without grid connection, it turns solar and battery DC into stable AC for remote homes, cabins, and mobile systems.
  • Pure Sine Wave Output — It supplies a clean 208-240Vac pure sine wave that safely runs sensitive electronics and motors without modified-wave noise.
  • Built-In MPPT Solar Charger — A 18A MPPT stage harvests up to 800W from panels across a 17-115Vdc range, tracking the array to capture more sunlight.
  • Flexible 12V Battery Support — The inverter works with both lithium and lead-acid 12V batteries, so users can match chemistry to budget and lifecycle needs.
  • Compact, Lightweight Build — At 320x227x100mm and 3.5kg, it fits tight spaces such as RVs, boats, and small equipment enclosures.
  • Integrated Charger and Protection — A built-in AC charger tops up the battery from grid or generator, while overload, short-circuit, and IP21 protection support safe -10C to 60C operation.

Applications

  • Home Solar Systems: Powers lights, electronics, and small appliances in off-grid houses and cabins.
  • Cabins and Remote Houses: Supplies everyday AC power where utility lines do not reach.
  • RVs and Boats: Compact 3.5kg build fits vehicle and marine battery systems.
  • Solar Street and Monitoring: Runs remote equipment and sensors away from the grid.
  • Telecom and Field Sites: Keeps communication and field devices running on solar and battery.
  • Emergency Backup: Provides standalone power during outages for essential loads.

Solar Input & Power Conversion

The SW-1.5KW-12V centers on efficient solar harvesting through a dedicated MPPT charging stage. Rated for 18A and up to 800W of PV input, it operates across a 17-115Vdc MPPT range with a 115Vdc maximum open-circuit limit, tracking each panel string's operating point to draw the most energy as light conditions change.

On the output side, the inverter converts stored battery and panel DC into a stable 208-240Vac pure sine wave, protecting sensitive loads from distortion. A 10ms transfer and pure sine wave output help connected equipment run smoothly, whether the energy comes from solar, battery, or the built-in AC charger.

Off-Grid Load Management & System Operation

Although built for off-grid use, the inverter integrates closely with a 12V battery bank, supporting both lithium and lead-acid chemistries. This lets the system store solar energy by day and deliver stable AC power at night or during cloudy periods without any grid connection.

A built-in AC charger adds resilience by topping up the battery from a grid socket or generator when solar is insufficient. Combined with overload, short-circuit, and IP21 enclosure protection and a -10C to 60C operating range, the unit maintains safe, continuous operation in demanding environments.

Frequently Asked Questions

Can this 1.5kW off-grid inverter run my appliances without grid power?

Yes. It is designed for off-grid use, converting solar panel and 12V battery DC into 208-240Vac pure sine wave power for lights, electronics, and small appliances where no utility connection exists.

What battery can I use with the SW-1.5KW-12V?

It supports both 12V lithium and lead-acid batteries, giving you flexibility between lower upfront cost and longer cycle life.

How do I charge the battery if there is no sun?

The inverter has a built-in AC charger that replenishes the battery from a grid outlet or generator, so you are not dependent on solar alone.

Can I connect two of these in parallel for more power?

No. This model is not designed for parallel operation, so capacity cannot be expanded by linking units; choose a higher-power model for larger loads.

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