---
title: "Hyundai HIE-S395VG vs Hyundai HIE-S400VG - Solar Panel Comparison | ComparePV"
description: "Compare Hyundai HIE-S395VG vs Hyundai HIE-S400VG side by side: what actually differs, output when it is hot, thirty-year production, and the full specification."
source: "https://comparepv.com/compare/hyundai-hie-s395vg/hyundai-hie-s400vg"
image: "https://comparepv.com/og/compare/panels/hyundai-hie-s395vg/hyundai-hie-s400vg.png"
updated: 2026-09-11
---

# Hyundai HIE-S395VG vs Hyundai HIE-S400VG

S400VG leads on the differences that matter

The largest is module efficiency: 0.20 pp more efficient. 17 of 18 comparable parameters are identical, with 1 more left out because at least one datasheet does not publish it.


## The two panels


| Attribute | A | B |
| --- | --- | --- |
| Panel | [Hyundai HIE-S395VG](https://comparepv.com/panel/hyundai-hie-s395vg) | [Hyundai HIE-S400VG](https://comparepv.com/panel/hyundai-hie-s400vg) |
| Manufacturer | Hyundai | Hyundai |
| Power | 395 Wp | 400 Wp |
| Efficiency | 20.20 % | 20.40 % |
| Technology | PERC | PERC |


## Where they differ

Ranked by how much the difference matters, not by datasheet order.


| Parameter | S395VG | S400VG | Difference |
| --- | --- | --- | --- |
| Module efficiency | 20.20 % | 20.40 % | +0.20 pp for S400VG |


## Every compared parameter


| Parameter | S395VG | S400VG |
| --- | --- | --- |
| Rated power | 395 Wp | 400 Wp |
| Module efficiency | 20.20 % | 20.40 % |
| Power density | 201.6 Wp/m² | 204.1 Wp/m² |
| Open-circuit voltage | 46.30 V | 46.40 V |
| Voltage at max power | 38.50 V | 38.60 V |
| Short-circuit current | 10.92 A | 10.97 A |
| Current at max power | 10.26 A | 10.36 A |
| Temperature coefficient | -0.340 %/°C | -0.340 %/°C |
| Dimensions | 1719x1140x35 mm | 1719x1140x35 mm |
| Module area | 1.960 m² | 1.960 m² |
| Weight | 22.0 kg | 22.0 kg |
| Weight per kWp | 55.7 kg/kWp | 55.0 kg/kWp |
| Product warranty | 25 yrs | 25 yrs |
| Performance warranty | 25 yrs | 25 yrs |
| Annual degradation | 0.55 %/yr | 0.55 %/yr |
| Cell technology | PERC | PERC |
| Cell type | Monocrystalline | Monocrystalline |
| Cell count | - | - |
| Bifacial | No | No |


## Thirty-year yield

Each panel's own declared degradation curve, at 1,200 kWh/kWp a year

Same temp coeff. for both panels (-0.340 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.

- **Cumulative output, S395VG:** 12,802 kWh
- **Cumulative output, S400VG:** 12,964 kWh
- **Gap:** 162 kWh


## Output when hot


| Condition | Cell temperature | S395VG | S400VG | Retained |
| --- | --- | --- | --- | --- |
| Standard test conditions | 25 °C | 395 W | 400 W | 100.0% of rated power |
| Cool, bright day | 40 °C | 375 W | 380 W | 94.9% of rated power |
| Typical summer roof | 55 °C | 355 W | 359 W | 89.8% of rated power |
| Hot roof | 70 °C | 335 W | 339 W | 84.7% of rated power |


## Against the whole database


| Measure | S395VG | S400VG | Out of | Note |
| --- | --- | --- | --- | --- |
| Efficiency | #12,039 | #11,680 | 14,129 | S400VG leads by 359 places |
| Power density | #12,121 | #11,678 | 14,129 | S400VG leads by 443 places |
| Heat behaviour | #8,846 | #8,846 | 14,129 | Tied - the same position in the database |
| Weight | #10,175 | #9,445 | 14,129 | S400VG leads by 730 places |
| Warranty | #9,912 | #9,912 | 14,129 | Tied - the same position in the database |
| Overall | #11,072 | #10,832 | 14,129 | S400VG leads by 240 places |


## Questions


### Which panel is better: Hyundai HIE-S395VG or Hyundai HIE-S400VG?

According to our database: **Hyundai HIE-S400VG** has higher module efficiency (**20.40%** vs **20.20%**). See the full spec comparison and 30-year energy simulation above for a complete picture.


### What is the efficiency of Hyundai HIE-S395VG and Hyundai HIE-S400VG?

**Hyundai HIE-S395VG** has a module efficiency of **20.20%**, while **Hyundai HIE-S400VG** is **20.40%**. Higher efficiency means more electricity from the same roof area - useful when space is limited.


### What cell technology does Hyundai HIE-S395VG use vs Hyundai HIE-S400VG?

**Hyundai HIE-S395VG** uses **PERC** cells; **Hyundai HIE-S400VG** uses **PERC**. Modern **n-type** technologies (**TOPCon**, **HJT**, BC) typically deliver higher efficiency and lower degradation compared to older **PERC** (p-type) cells.


### What is the warranty on Hyundai HIE-S395VG and Hyundai HIE-S400VG?

**Hyundai HIE-S395VG** has a **25 years** power warranty; **Hyundai HIE-S400VG** has a **25 years** power warranty. The power warranty guarantees a minimum percentage of rated output at the end of the warranty period (typically 80**-87%**). Product (materials) warranties are usually shorter.


## Related comparisons

- [Hyundai HIE-S395VG vs Hyundai HIE-S410VG](https://comparepv.com/compare/hyundai-hie-s395vg/hyundai-hie-s410vg) - 4 differences, the largest is module efficiency
- [Hyundai HIE-S395VG vs Hyundai HIE-S405VG](https://comparepv.com/compare/hyundai-hie-s395vg/hyundai-hie-s405vg) - 3 differences, the largest is module efficiency
- [Hyundai HIE-S395VG vs Hyundai HIE-S390VG](https://comparepv.com/compare/hyundai-hie-s395vg/hyundai-hie-s390vg) - One difference: module efficiency
- [Hyundai HIE-S395VG vs Hyundai HiS-T640NJ](https://comparepv.com/compare/hyundai-hie-s395vg/hd-hyundai-energy-solutions-his-t640nj) - 16 differences, the largest is module efficiency
- [Hyundai HIE-S395VG vs Hyundai HiS-T635NJ](https://comparepv.com/compare/hyundai-hie-s395vg/hd-hyundai-energy-solutions-his-t635nj) - 16 differences, the largest is module efficiency
- [Hyundai HIE-S395VG vs Hyundai HiS-T630NJ](https://comparepv.com/compare/hyundai-hie-s395vg/hd-hyundai-energy-solutions-his-t630nj) - 16 differences, the largest is module efficiency


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Source: https://comparepv.com/compare/hyundai-hie-s395vg/hyundai-hie-s400vg

Not in this file, on the page: the thirty-year yield curve year by year at a cell temperature you pick and a written summary generated on request.