---
title: "Easun Power ISolar SMK 5K vs Growatt SPF 3500 ES Lite - Inverter Comparison | ComparePV"
description: "Compare Easun Power ISolar SMK 5K vs Growatt SPF 3500 ES Lite side by side: what actually differs, efficiency, MPP trackers, battery input and the full specification."
source: "https://comparepv.com/compare-inverters/easun-power-isolar-smk-5k/growatt-spf-3500-es-lite"
updated: 2026-01-19
---

# Easun Power ISolar SMK 5K vs Growatt SPF 3500 ES Lite

SPF 3500 ES Lite leads on the differences that matter

The largest is max dc voltage: 355 V apart. 7 of 13 comparable parameters are identical, with 19 more left out because at least one datasheet does not publish them.


## The two inverters


| Attribute | A | B |
| --- | --- | --- |
| Inverter | [Easun Power ISolar SMK 5K](https://comparepv.com/inverter/easun-power-isolar-smk-5k) | [Growatt SPF 3500 ES Lite](https://comparepv.com/inverter/growatt-spf-3500-es-lite) |
| Manufacturer | Easun Power | Growatt |
| Rated AC power | 5 kW | 5 kW |
| Type | Off-grid | Off-grid |


## Where they differ

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


| Parameter | ISolar SMK 5K | SPF 3500 ES Lite | Difference |
| --- | --- | --- | --- |
| Max DC voltage | 145 V | 500 V | 355 V apart |
| Max PV power | 4.00 kW | 4.50 kW | 0.50 kW apart |
| Weight | 13.5 kg | 9.2 kg | -4.3 kg for SPF 3500 ES Lite |
| Weight per kW | 2.7 kg/kW | 1.8 kg/kW | -0.9 kg/kW for SPF 3500 ES Lite |
| DC/AC ratio | 0.80 | 0.90 | +0.10 for SPF 3500 ES Lite |
| Dimensions | 525x303x140 mm | 135x330x485 mm | 525x303x140 mm vs 135x330x485 mm |


## Every compared parameter


| Parameter | ISolar SMK 5K | SPF 3500 ES Lite |
| --- | --- | --- |
| Rated AC power | 5.00 kW | 5.00 kW |
| Max AC power | 5.00 kW | 5.00 kW |
| Grid connection | Single-phase | Single-phase |
| Nominal AC voltage | 230 V | 230 V |
| Max AC current | - | - |
| Max PV power | 4.00 kW | 4.50 kW |
| DC/AC ratio | 0.80 | 0.90 |
| Max DC voltage | 145 V | 500 V |
| MPPT voltage range | - | 120-450 V |
| Start voltage | - | - |
| MPP trackers | - | 1 |
| Strings per tracker | - | 1 |
| Max input current per tracker | - | 22.0 A |
| European efficiency | - | - |
| Max efficiency | 93.0 % | 93.0 % |
| CEC efficiency | - | - |
| Battery input | Yes | Yes |
| Battery voltage | - | 48 VDC |
| Max charge current | - | - |
| Backup power | - | - |
| Weight | 13.5 kg | 9.2 kg |
| Weight per kW | 2.7 kg/kW | 1.8 kg/kW |
| Dimensions | 525x303x140 mm | 135x330x485 mm |
| Ingress protection | - | IP20 |
| Cooling | - | - |
| Noise | - | - |
| Max operating temperature | 55 °C | 55 °C |
| Wi-Fi | - | Yes |
| Ethernet | - | - |
| Arc fault protection | - | - |
| Integrated DC switch | - | - |
| Warranty | - | - |


## Related comparisons

- [Easun Power ISolar SMK 5K vs Growatt SPF 5000 ES](https://comparepv.com/compare-inverters/easun-power-isolar-smk-5k/growatt-spf-5000-es) - 6 differences, the largest is max dc voltage
- [Easun Power ISolar SMK 5K vs Growatt SPF 5000T DVM](https://comparepv.com/compare-inverters/easun-power-isolar-smk-5k/growatt-spf-5000t-dvm) - 6 differences, the largest is max efficiency
- [Easun Power ISolar SMK 5K vs Growatt SPF 5000T DVM-MPV](https://comparepv.com/compare-inverters/easun-power-isolar-smk-5k/growatt-spf-5000t-dvm-mpv) - 9 differences, the largest is max dc voltage
- [Growatt SPF 3500 ES Lite vs Growatt SPF 5000 ES Lite](https://comparepv.com/compare-inverters/growatt-spf-3500-es-lite/growatt-spf-5000-es-lite) - 4 differences, the largest is max pv power


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Source: https://comparepv.com/compare-inverters/easun-power-isolar-smk-5k/growatt-spf-3500-es-lite

Not in this file, on the page: a written summary generated on request.