GoodWe ET LV Three Phase Hybrid Inverter Guide for Pakistan — GW12K, GW15K or GW20K
Complete buying guide for the GoodWe ET LV three phase hybrid inverter series in Pakistan. Compares GW12K-ET-L-G10 at Rs 485,000, GW15K-ET-L-G10 at Rs 585,000 and GW20K-ET-L-G10 at Rs 765,000. Property size decision framework for Lahore marla and Karachi gaz buyers with three phase connections.
16 min read
The GoodWe ET LV Series is a range of three phase low voltage hybrid inverters from GoodWe (Jiangsu) Co., Ltd. covering 12kW, 15kW and 20kW of output in Pakistan. All three models — the GW12K-ET-L-G10, GW15K-ET-L-G10 and GW20K-ET-L-G10 — share the same sub-4 millisecond switching speed, IP66 ingress protection and built-in Type II surge protection on both DC and AC sides. What separates them is output power, the number of MPPTs, battery input configuration and price — differences that map directly onto Pakistani property sizes from 15 marla up to 2 kanal and beyond.
This guide answers the one question the individual model reviews do not answer: which ET LV model is right for your specific property and load. It covers the complete series comparison, a property size decision framework for Pakistani buyers in both Lahore and Karachi, battery scaling across all three models, and the key differences between the GoodWe ET LV three phase range and the single phase alternatives available in Pakistan.
Series price range as of October 2026:
| Model | Output | Price |
|---|---|---|
| GW12K-ET-L-G10 | 12kW | Rs 485,000 |
| GW15K-ET-L-G10 | 15kW | Rs 585,000 |
| GW20K-ET-L-G10 | 20kW | Rs 765,000 |
Do You Have a Three Phase Connection — Check Before Reading Further
Every model in the GoodWe ET LV Series requires a three phase electricity connection. None of these inverters will function on a single phase supply. Before choosing a model, confirm your connection type.
How to check your electricity meter in Pakistan:
Look at the main incoming cables entering your electricity meter box. A three phase connection has three live wires plus a neutral wire — four cables total entering the meter. A single phase connection has one live wire and one neutral — two cables. If you are unsure, call LESCO on 118 in Lahore or K-Electric on 118 in Karachi and ask whether your connection is single phase or three phase. Your electricity bill tariff category also indicates your connection type — a three phase or industrial tariff confirms three phase supply.
Who typically has three phase in Pakistan:
Properties of 15 marla and above in DHA Lahore, Bahria Town, Gulberg, Model Town and Cantt almost always have three phase LESCO connections. Properties of 300 gaz and above in DHA Karachi, Clifton, PECHS and Gulshan typically have three phase K-Electric connections. Small commercial offices, clinics and retail shops with heavy air conditioning loads generally operate on three phase connections.
If your property has single phase:
The GoodWe ET LV Series is not for your property. Single phase alternatives available from MartOnline include the SAJ H2 range from Rs 175,000 to Rs 365,000 and the GoodWe ES Uniq range from Rs 194,000 to Rs 412,000.
What Is the GoodWe ET LV Series
The GoodWe ET LV Series is a family of three phase hybrid inverters designed for residential and light commercial use with low voltage battery storage. ET stands for Energy Three phase. LV stands for Low Voltage — the series integrates with standard 48V LFP batteries in the 40V to 60V range, the same batteries used in single phase residential systems.
GoodWe (Jiangsu) Co., Ltd. is publicly listed on the Shanghai Stock Exchange and ranks among the top 10 global inverter manufacturers by annual shipment volume. Products are installed in more than 100 countries. The ET LV Series was specifically developed for markets where three phase residential connections are common alongside low voltage battery storage — Europe, Australia and large-format homes in Pakistan.
Three specifications are shared across all ET LV models:
Seamless switching under 4 milliseconds from grid to battery backup — faster than the SAJ H2 single phase series (under 10ms) and the Crown Micro Elego Oyster series (under 20ms). IP66 ingress protection for indoor and outdoor installation. Built-in Type II surge protection devices on both DC and AC sides, protecting the inverter and battery bank against lightning-induced voltage spikes without requiring separately purchased external SPDs.
"All three GoodWe ET LV models — GW12K-ET-L-G10, GW15K-ET-L-G10 and GW20K-ET-L-G10 — switch from grid to battery backup in under 4 milliseconds and carry IP66 ingress protection, as confirmed in the official GoodWe ET LV Series datasheet GoodWe-Single page-20250424-EN-D2.1."
Complete ET LV Series Comparison — All Three Models
This is the only table in Pakistan that presents all three GoodWe ET LV models side by side against every key specification. Individual model reviews cover each inverter in depth — this table covers the complete picture for buyers deciding between models.
| Feature | GW12K ET LV | GW15K ET LV | GW20K ET LV |
|---|---|---|---|
| Price | Rs 485,000 | Rs 585,000 | Rs 765,000 |
| Rated Output | 12kW | 15kW | 20kW |
| Switching Time | Under 4ms | Under 4ms | Under 4ms |
| MPPTs | 3 | 4 | 4 |
| Max PV Input | 24,000Wp | 30,000Wp | 40,000Wp |
| Battery Inputs | 1 | 2 (Dual) | 2 (Dual) |
| Max Charge Current | 250A | 165A + 165A | 208A + 208A |
| Combined Charge A | 250A | 330A | 416A |
| Max Discharge | 13.2kW | 16.5kW | 22kW |
| Max Backup Surge | 24kVA / 10s | 30kVA / 10s | 40kVA / 10s |
| IP Rating | IP66 | IP66 | IP66 |
| Built-in SPD | DC + AC | DC + AC | DC + AC |
| Monitoring | WiFi + 4G | WiFi + 4G | WiFi + 4G |
| Weight | 47.5 kg | 52.0 kg | 52.0 kg |
| Dimensions | 754×549×262mm | 754×549×262mm | 754×549×262mm |
| Warranty | 5 years | 5 years | 5 years |
Source: GoodWe official datasheet GW12K/GW15K/GW20K-ET-L-G10, document GoodWe-Single page-20250424-EN-D2.1.
How to Choose — Property Size Decision Guide
The right ET LV model maps directly onto your property size and peak simultaneous load. This framework is specific to Pakistani properties and uses both marla (Lahore standard) and gaz (Karachi standard).
12 to 15 Marla / 300 to 400 Gaz → GW12K ET LV
A 15 marla home in Lahore or 300 to 400 gaz bungalow in Karachi typically runs two to three large ACs alongside full household loads — a peak simultaneous demand of approximately 8,000W to 10,000W. With a 20 percent safety margin the inverter needs to handle approximately 10,000W to 12,000W comfortably. The GW12K ET LV at 12kW rated output and 13.2kW maximum discharge handles this load with headroom.
Lahore areas: 15 marla in DHA Phase 1 to 5, Johar Town, Wapda Town, Model Town Extensions with three phase connections.
Karachi areas: 300 to 400 gaz in DHA Phase 2 to 6, PECHS, Gulshan-e-Iqbal, Clifton blocks 1 to 3.
Key GW12K features for this size: 3 MPPTs for moderate roof complexity, single battery input (1 to 4 batteries), 24,000Wp maximum solar for 20 to 40 panels of 600W.
→ Read the complete GoodWe GW12K ET LV review
1 Kanal / 400 to 500 Gaz → GW15K ET LV
A 1 kanal home in DHA Lahore or Bahria Town, or a 400 to 500 gaz villa in DHA Karachi, runs three to four large ACs with a combined peak load of 10,000W to 14,000W. The GW15K ET LV at 15kW output and 16.5kW maximum discharge handles this load comfortably. Its second key advantage at 1 kanal scale is the dual battery input — two independent 165A ports for a combined 330A, allowing two large battery banks to charge simultaneously for a total of 91.2kWh or more of usable storage.
Lahore areas: 1 kanal in DHA Phase 4 to 8, Bahria Town all phases, Gulberg, Model Town with three phase LESCO connections.
Karachi areas: 400 to 500 gaz in DHA Phase 6 to 8, Clifton Block 4 to 6, Bahria Town Karachi.
Key GW15K features at 1 kanal scale: 4 MPPTs for complex 1 kanal rooftop, dual battery inputs (330A combined), 30,000Wp for 28 to 50 panels of 600W.
→ Read the complete GoodWe GW15K ET LV review
2 Kanal and Above / 600 to 800 Gaz → GW20K ET LV
A 2 kanal property in DHA Lahore Phase 6, 7 or 8, or a 600 to 800 gaz villa in DHA Karachi Phase 8 or Clifton Block 7 to 9, runs four or more large ACs with a peak simultaneous load approaching 15,000W to 20,000W. Only the GW20K ET LV at 22kW continuous discharge handles this scale without throttling. Its 416A combined dual battery charging (208A + 208A) is the fastest battery recharge rate in the ET LV range, and its 40,000Wp maximum solar input accommodates the full rooftop of a 2 kanal property with up to 66 panels of 600W.
Lahore areas: 2 kanal in DHA Phase 6, 7 and 8, Bahria Town 2 kanal plots, Gulberg 2 kanal bungalows.
Karachi areas: 600 to 800 gaz in DHA Phase 8, Clifton Block 7 to 9, Bahria Town Karachi.
Also for: Large farmhouses along the Lahore–Sheikhupura corridor, large commercial offices and clinics with 15 to 20kW peak loads, and buyers replacing 20kVA or larger diesel generators.
Key GW20K features at 2 kanal scale: 22kW discharge for full 2 kanal simultaneous load, 416A combined charging for fast recharge, 40,000Wp for full 2 kanal rooftop coverage.
→ Read the complete GoodWe GW20K ET LV review
Small Commercial Properties
The ET LV Series also serves small commercial properties with three phase connections:
| Commercial Load | Recommended Model |
|---|---|
| Small office, 5 to 7 ACs, 10 to 12kW peak | GW12K ET LV |
| Medium office, clinic, 8 to 12 ACs, 12 to 15kW peak | GW15K ET LV |
| Large office, hospital, 15 to 20kW peak | GW20K ET LV |
The Key Differences — What Changes Between Models
The step from GW12K to GW15K (Rs 100,000 more):
You gain a fourth MPPT, 6,000Wp more solar input (30,000Wp vs 24,000Wp), 3kW more output and discharge power, and the most significant upgrade — dual battery inputs. The GW15K's second battery port changes the system from a single large battery bank to two independent banks charging simultaneously at 330A combined. For buyers who need more than 4 batteries or want independent redundancy in their storage system, this upgrade is the correct choice.
The step from GW15K to GW20K (Rs 180,000 more):
You gain 5kW more output (20kW vs 15kW), 5.5kW more maximum discharge (22kW vs 16.5kW), 10,000Wp more solar input (40,000Wp vs 30,000Wp), and higher per-port battery current (208A vs 165A, combined 416A vs 330A). The MPPTs stay at 4. This upgrade is justified only when peak load regularly exceeds 15kW — which means 2 kanal properties and larger commercial operations. For 1 kanal homes the GW15K is sufficient and saves Rs 180,000.
GoodWe ET LV vs Single Phase Alternatives
Some buyers with three phase connections consider single phase inverters because they are less expensive. Here is the honest comparison at the 12kW level:
| Feature | GW12K ET LV | SAJ H2 12kW |
|---|---|---|
| Price | Rs 485,000 | Rs 365,000 |
| Phase | Three Phase | Single Phase |
| Switching | Under 4ms | Under 10ms |
| MPPTs | 3 | 2 |
| IP Rating | IP66 | IP65 |
| Max Discharge | 13.2kW | 12kW |
| Price Difference | +Rs 120,000 | — |
Choose GW12K ET LV if: Your property has a three phase connection, sub-4ms switching is important for computers or sensitive equipment, or 3 MPPTs suit your complex rooftop layout.
Choose SAJ H2 12kW if: Your property has single phase only (the GW12K will not work), or the Rs 120,000 saving takes priority and 10ms switching is sufficient for your equipment.
For a full single phase inverter comparison read our SAJ H2 12kW review.
Compatible Batteries Across All ET LV Models
All three ET LV models accept the same low voltage LFP batteries in the 40V to 60V range via RS485 or CAN. Three batteries are available from MartOnline:
SAJ 16kWh Lithium Battery — Rs 580,000 15.2kWh usable. CAN. 8,000+ cycles. Most cost-effective for large banks.
Sunwoda Atrix Max+ 16kWh — Rs 600,000 16kWh usable at 100% DOD. CAN 2.0 and RS485. 10,000 cycles.
Mesol 16kWh Infiniti — Rs 635,000 ~15.2kWh usable. RS485 and CAN. 6,000+ cycles.
Battery count by model and use case:
| Model | Hybrid Backup | Off-Grid Minimum | Off-Grid Recommended |
|---|---|---|---|
| GW12K (1 port) | 1 to 2 batteries | 4 batteries | 6 batteries |
| GW15K (2 ports) | 2 to 4 batteries | 6 batteries | 8 batteries |
| GW20K (2 ports) | 4 to 6 batteries | 8 to 10 batteries | 10 to 12 batteries |
Solar Panel Sizing by Model
All ET LV models support 200% DC oversizing — connecting panels rated above the inverter's nominal AC output is standard practice and maximises energy harvest during Pakistan's limited peak solar window.
| Model | Recommended Panels | Total PV Range | Est. Daily Gen (Lahore) |
|---|---|---|---|
| GW12K ET LV | 20 to 40 panels (600W) | 12,000 to 24,000Wp | 62.4 to 124.8 kWh |
| GW15K ET LV | 28 to 50 panels (600W) | 16,800 to 30,000Wp | 87.4 to 156.0 kWh |
| GW20K ET LV | 40 to 66 panels (600W) | 24,000 to 39,600Wp | 124.8 to 205.9 kWh |
Based on Lahore annual average of 5.2 peak sun hours per day.
Generator Integration
All three ET LV models accept three phase generator input at 400/380V. The inverter manages generator operation automatically — starting when battery levels fall below a set threshold, charging the battery bank from generator power, and switching back to solar when generation resumes.
Minimum generator size by model:
| Model | Minimum Generator | Type |
|---|---|---|
| GW12K ET LV | 15 kVA | Three Phase |
| GW15K ET LV | 20 kVA | Three Phase |
| GW20K ET LV | 25 kVA | Three Phase |
Installation Requirements
All ET LV models are wall mounted, IP66 rated for indoor or outdoor installation, and require a qualified solar engineer for commissioning. Key requirements common to all three:
A verified three phase electricity connection. Proper earthing for inverter, battery bank and panel mounting structure — mandatory for safety and NEPRA compliance. DC and AC cables rated for the maximum current of the specific model. A three phase generator connected to the generator input port is recommended for all off-grid and heavy-duty hybrid installations.
For professional installation in Lahore and Karachi, Matrix Technologies offers solar energy installation services through their energy division at matrixtechnology.net.pk/Energy. MartOnline supplies the equipment and connects buyers with the right installation team for their system scale.
Read the Full Reviews
This guide covers the complete series. For detailed specifications, backup hour calculations, battery compatibility tables, generator ROI analysis and individual model comparisons, read the dedicated reviews:
GoodWe GW12K ET LV — Complete Review Rs 485,000 | 12kW | 3 MPPTs | Single battery input | Best for 15 marla and 300–400 gaz
GoodWe GW15K ET LV — Complete Review Rs 585,000 | 15kW | 4 MPPTs | Dual battery inputs (330A) | Best for 1 kanal and 400–500 gaz
GoodWe GW20K ET LV — Complete Review Rs 765,000 | 20kW | 4 MPPTs | Dual battery inputs (416A) | Best for 2 kanal and 600–800 gaz
Frequently Asked Questions
Which GoodWe ET LV three phase inverter is best for Pakistan?
The right GoodWe ET LV model depends on your property size and peak load. The GW12K-ET-L-G10 at Rs 485,000 is best for 12 to 15 marla homes in Lahore and 300 to 400 gaz bungalows in Karachi with peak loads below 12kW. The GW15K-ET-L-G10 at Rs 585,000 is best for 1 kanal homes in Lahore and 400 to 500 gaz properties in Karachi with peak loads of 12 to 15kW and a need for dual battery banks. The GW20K-ET-L-G10 at Rs 765,000 is best for 2 kanal properties and above in Lahore, 600 to 800 gaz villas in Karachi, and buyers replacing diesel generators with peak loads of 15 to 20kW.
What is the price range of the GoodWe ET LV series in Pakistan?
The GoodWe ET LV Series is available in Pakistan from MartOnline in three models as of October 2026: GW12K-ET-L-G10 at Rs 485,000, GW15K-ET-L-G10 at Rs 585,000 and GW20K-ET-L-G10 at Rs 765,000, all including free delivery across Pakistan. All three prices are for the inverter unit only — batteries, solar panels, mounting structure and installation are additional costs that vary by system size.
Do all GoodWe ET LV inverters need a three phase connection?
Yes. All three models in the GoodWe ET LV Series — GW12K, GW15K and GW20K — require a three phase electricity connection from your local DISCO. None will function on a single phase supply. To check your connection type call LESCO on 118 in Lahore or K-Electric on 118 in Karachi. If your property has single phase supply, the GoodWe ES Uniq single phase series (Rs 194,000 to Rs 412,000) or the SAJ H2 single phase series (Rs 175,000 to Rs 365,000) are the correct alternatives.
How fast do GoodWe ET LV inverters switch during load shedding?
All three GoodWe ET LV models — GW12K-ET-L-G10, GW15K-ET-L-G10 and GW20K-ET-L-G10 — switch from grid power to battery backup in under 4 milliseconds, as confirmed in the official GoodWe ET LV Series datasheet GoodWe-Single page-20250424-EN-D2.1. This sub-4ms switching is faster than the SAJ H2 single phase series (under 10ms) and the Crown Micro Elego Oyster series (under 20ms), and fast enough that computers, servers, medical equipment and LED lighting continue operating without interruption during load shedding.
What is the difference between GW12K, GW15K and GW20K ET LV?
The three models differ in output power, MPPT count, solar input capacity, battery input configuration and price. The GW12K has 12kW output, 3 MPPTs, 24,000Wp solar and one battery input port. The GW15K has 15kW output, 4 MPPTs, 30,000Wp solar and two independent battery input ports with 330A combined charging current. The GW20K has 20kW output, 4 MPPTs, 40,000Wp solar and two independent battery input ports with 416A combined charging current. All three share the same sub-4ms switching, IP66 rating, built-in Type II SPD and 5-year warranty.
Can I use the same batteries with all three GoodWe ET LV models?
Yes. All three ET LV models accept the same low voltage LFP batteries in the 40V to 60V range via RS485 or CAN communication. Compatible batteries from MartOnline include the SAJ 16kWh (Rs 580,000, CAN), Sunwoda Atrix Max+ 16kWh (Rs 600,000, CAN 2.0 and RS485) and Mesol 16kWh Infiniti (Rs 635,000, RS485 and CAN). The number of batteries required scales with the model — the GW12K typically uses 1 to 6 batteries through its single input port, while the GW15K and GW20K use 2 to 12 batteries split across their dual input ports.
View all GoodWe ET LV products: GW12K ET LV | GW15K ET LV | GW20K ET LV
Need a single phase inverter? See the SAJ H2 Series or GoodWe ES Uniq Series
Use our free solar calculator to estimate panels, batteries and system size for your property, or contact MartOnline via WhatsApp at 0324-3493060 for a complete system design.