Description
xSolis 50kW Three Phase Hybrid Solar Inverter High Voltage S6-EH3P50K-H
The Solis S6-EH3P50K-H is a 50kW three-phase hybrid inverter for commercial and industrial solar PV and battery storage installations. It runs on 400V AC at 50Hz, supports a high voltage battery range of 150V to 800V DC, and is designed for sites where large-scale solar generation, battery storage and backup power are needed in one system.
With 4 MPPT trackers, dual independent battery ports, DC and AC coupling support, and the ability to parallel multiple units, it suits new-build commercial systems as well as retrofits and system expansions.
Key Features
- 50kW rated output, 400VAC three phase, 50Hz
- 4 MPPT trackers, up to 8 string inputs
- Recommended PV array size: up to 100kW
- Max usable PV input power: 96kW
- Supports up to 2x rated PV input for improved harvest
- Max string input current: 20A per string
- Battery voltage range: 150V to 800V DC (high voltage only)
- Dual independent battery ports, up to 70A charge/discharge each
- DC and AC coupling supported for new systems and retrofits
- Backup switching time: less than 10ms
- Off-grid overload: 160% for 2 seconds
- Generator input supported
- Parallel operation supported for larger systems
- 7-inch industrial touchscreen with Bluetooth and app
- SolisCloud remote monitoring and diagnostics
- IP66 rated enclosure with intelligent fan cooling
Product Overview
The S6-EH3P50K-H is not a standard residential product. It is designed for commercial buildings, warehouses, agricultural sites, industrial premises and any three-phase installation where a single 50kW unit is needed to handle significant solar input, large battery storage and reliable backup power simultaneously.
The high voltage battery architecture, 150V to 800V DC, is the key differentiator from lower-tier commercial inverters. Higher battery voltage means lower operating current for the same power output, which reduces cable cross-sections, minimises heat losses and simplifies thermal management across the whole battery installation. This inverter is not compatible with standard 48V battery systems.
Dual battery ports allow two separate battery strings to be connected independently, which gives flexibility in battery sizing, phased expansion and redundancy. Each port handles up to 70A charge and discharge current. DC coupling means solar panels can charge the battery directly through the inverter without going via the AC bus, improving round-trip efficiency.
The 160% overload capability for two seconds in off-grid mode is sufficient to start most motor-driven commercial loads, including pumps, compressors and refrigeration equipment, without tripping the inverter.
Technical Specifications
| Parameter | Value |
| Rated output power | 50kW |
| AC output configuration | 3/N/PE, 400VAC, 50Hz |
| MPPT trackers / string inputs | 4 / 8 |
| Max recommended PV array | 100kW |
| Max usable PV input power | 96kW |
| Max string input current | 20A |
| Battery voltage range | 150V to 800V DC (high voltage) |
| Battery ports | 2 independent |
| Max battery charge/discharge current | 70A x 2 |
| Coupling | DC and AC |
| Backup switching time | <10ms |
| Off-grid overload | 160% for 2 seconds |
| Generator input | Supported |
| IP rating | IP66 |
| Display | 7-inch industrial touchscreen |
| Monitoring | SolisCloud (Bluetooth, WiFi, LAN) |
| SKU | S6-EH3P-50KW |
Applications
- Commercial and industrial solar PV and battery storage systems
- Three-phase commercial buildings: offices, warehouses, factories
- Agricultural sites and large farm energy installations
- Energy cost reduction and solar self-consumption projects
- Backup power for critical commercial loads
- Retrofit battery integration for existing commercial solar systems
- Sites requiring generator integration and flexible energy management
Installation Notes
This inverter is high voltage battery compatible only. It is not suitable for 48V battery systems. Installation must be carried out by a qualified electrical engineer with commercial solar experience. Three-phase grid connection requires G99 compliance (UK). High voltage battery systems require specialist design, cabling and commissioning. Contact us for pre-sales support and system design assistance before ordering.
Specifications
xTechnical Highlights
- Model: S6-EH3P50K-H
- Inverter type: Three-phase high voltage hybrid energy storage inverter
- European grid version: 3/N/PE, 230V / 400V, 50Hz
- Rated AC output power: 50kW
- Max apparent output power: 50kVA
- Recommended max PV array size: 100kW
- Max usable PV input power: 96kW
- Max DC input voltage: 1000V
- MPPT voltage range: 150V to 850V
- Start-up voltage: 180V
- MPPTs: 4
- Max input strings: 8
- Max string input current: 20A
- Battery voltage range: 150V to 800V
- Battery type: Li-ion
- Battery ports: 2
- Max charge/discharge current: 70A × 2
- Max charge/discharge power: 55kW
- Backup switch time: <10ms
- Max efficiency: 97.8%
- EU efficiency: 97.4%
- Ingress protection: IP66
- Dimensions: 530 × 880 × 290 mm
- Weight: 73 kg
Return Policy
xWe offer a 14-day, no-quibble returns or replacement policy because we want you to be totally satisfied with your purchase.
If you are unhappy in any way with your purchase, you can return it for a refund or a replacement, as long as you return it in the same condition as it arrived (original/undamaged packaging and product) and within 30 days of receiving it. We will pay for your return postage on a faulty item as long as you send it using Royal Mail 2nd class recorded delivery (for EU or International Shipments, you have to use our UPS account, we will provide you with a return label)
Please keep in mind the following:
- Items returned within 14 days but not in their original and undamaged packaging will also incur a -15% charge per package.
- If you return an item that doesn't adhere to our returns procedure or doesn't include a returns form, you may be liable for a £10 administration fee
- Individual items from a bundle can't be returned, refunded or exchanged. If you want a refund/credit/exchange for a bundle, all items must be returned to us.
Before you return your item, please make sure that:
- You follow our returns process (outlined below)
- The goods and packaging are undamaged
IMPORTANT: We need to be able to identify an item with your order. We can only do this if you follow our returns process. Please do not send us items back that do not follow this process as they cannot be identified properly and will not be replaced or refunded.
What delivery method do I need to use when returning an item?
You must send the goods back to us via Royal Mail 2nd class recorded delivery. Refunds on faulty items returned are reimbursed within 5 working days.
Can I return just one item from multiple purchases?
Yes. Once you start the returns process you will go to a page that will allow you to choose which items you want to be replaced or refunded.
Returning faulty goods
If your item is faulty, you need to follow the returns policy, where you will be able to state that it’s faulty. The product will then arrive at our warehouse for testing.
If your purchase is not within 14 days
You can still exchange your item for a different product or for credit to use on the Voltacon Solar or Ledison-led-lights.co.uk websites (-15% from the credit amount).
Returns outside of the 14-day period do not qualify for the free returns policy.
Returning an item within the warranty
If you have a warranty and want to return a faulty item, you just need to follow our standard returns process. When we receive your item, we will then check that it’s within warranty and for any faults before arranging a replacement.