About this system

What it is, and what it is for

Power large homes, farms, rural properties, and light commercial sites with the ROCKSOLAR 20kW Hybrid Solar System. Built around two Growatt SPH 10000TL-HU-US hybrid inverters, this system combines 24.57kW of solar generation with dedicated battery storage for each inverter, providing a scalable solution for solar self-consumption, backup power, and greater energy independence.

20kW Hybrid Output | 24.57kW Solar | 40.96–57.36kWh Nominal Battery Storage

What's Included

2 × Growatt SPH 10000TL-HU-US Hybrid Inverters — 20kW Total
42 × ZNShine 585W Solar Panels — 24.57kW Total
6 Sets × 100 ft 10 AWG PV Cable
Growatt parallel inverter communication accessories

Battery Option 2 — Growatt ALP 40.96kWh

8 × Growatt ALP 5.0L-E2 US 5.12kWh LiFePO₄ Batteries — 40.96kWh Nominal Total
Configured as 2 independent 20.48kWh nominal battery clusters
4 batteries → Inverter #1
4 batteries → Inverter #2

Battery Option 1 — GSL 57.36kWh

4 × GSL 14.34kWh LiFePO₄ Batteries — 57.36kWh Nominal Total
Configured as 2 independent 28.68kWh battery banks
2 batteries → Inverter #1
2 batteries → Inverter #2

Each GSL battery is rated at 51.2V, 280Ah, 14.34kWh.

Key Features

20kW Hybrid Inverter Capacity – Dual Growatt SPH 10kW inverters for high-demand residential and light commercial applications
24.57kW Solar Array – 42 × 585W ZNShine panels for strong daytime production and battery charging
Dedicated Battery Bank per Inverter – Simplifies battery architecture and avoids a shared high-current DC combiner
40.96kWh or 57.36kWh Nominal LiFePO₄ Storage – Choose the battery capacity that best fits your backup needs
6 MPPT Trackers Total – Three MPPT trackers per inverter for flexible solar array design
100 ft PV Cable Included – Six 100 ft sets of 10 AWG PV cable for greater installation flexibility
120/240V Split-Phase Capability
Solar + Battery + Grid + Generator Operation
Parallel Inverter Operation – Two SPH inverters provide 20kW total system capacity

Ideal For

This 20kW hybrid solar system is well suited for:

Large homes and estates
Farms and rural properties
Workshops and agricultural buildings
Whole-home battery backup
High electricity-consumption properties
Light commercial applications

Roof-Mount & Ground-Mount Installation

This system can be used for either roof-mounted or ground-mounted solar installations, depending on the property and system design.

For a ground-mounted installation, module-level rapid shutdown devices may not be required depending on the applicable electrical code and local AHJ.

For a roof-mounted installation, rapid shutdown devices may be required and should be added separately based on the installation design and local code requirements.

Rapid shutdown devices are not included in the standard package.

Important Installation Note

Mounting/racking is not included. Final racking, rapid shutdown, AC and battery protection, grounding, utility interconnection, permitting, backup-load configuration, and site-specific wiring should be confirmed by a qualified solar installer and the local AHJ.

The ROCKSOLAR 20kW Hybrid Solar System combines 24.57kW of solar generation, 20kW of hybrid inverter capacity, and up to 57.36kWh of nominal battery storage into a powerful solution for large residential, farm, and light commercial energy needs.

Nominal and Usable Battery Capacity

Battery option	Nominal energy	Usable battery energy
8 × Growatt ALP 5.0L-E2 US	40.96 kWh	36.8 kWh
4 × GSL 14.34 kWh	57.36 kWh	54.492 kWh

Manufacturer figures: Growatt ALP 5.0L-E2 US provides 5.12 kWh nominal and 4.6 kWh usable per module. GSL051280A-B-GBP2F provides 14.34 kWh nominal and 13.623 kWh recommended discharge energy per module at 95% DoD. These are battery-side energy values, before inverter losses; delivered AC energy depends on operating conditions and system settings.

What ships

4 components, and one thing that isn't here

Each one is a product we sell on its own, so you can read its full listing, and replace or add to it later.

Racking and mounting are not included.

Rails, roof hooks, ground-mount posts and clamps depend on the roof or ground they go on, so no system ships with them. They are sold separately, and the finder adds the right pack for your surface when it sizes a system.

Documentation

Published before you buy. No email required.

The wiring diagram and the commissioning record are drawn from this system's own figures.

The wiring diagram and commissioning record are for customer reference only. They are not a stamped design. Installation, grounding and any grid connection must be carried out by a licensed electrician, and a professional engineer's review is required where your jurisdiction calls for one.

Full specification

Every number, by component.

The figures the manufacturer publishes. The datasheet above is the reference if the two ever differ.

Growatt SPH 10000TL-HU-US 10kW Hybrid Inverter (2 in parallel, 20kW)	Details
Maximum DC Input	15,000W
MPPT Voltage Range	150V - 450V / 370V
Number of MPPTs	3
Maximum Charging and Discharging Current	200A
Continuous Charging and Discharging Power	10,000W
Battery Voltage Range	40V - 60V
AC Output Power	Rated Power: 10,000W; Max. Apparent Power: 10,000VA; Nominal AC Voltage: 120V/208V, 120V/240V Split
Efficiency	Peak: 97.5%; MPPT Efficiency: ≥99.5%
Cooling	Smart cooling
Communication Interfaces	RS485/CAN/USB; Optional: WIFI/4G cellular
Protection Devices	Type II Surge Protection (DC and AC sides), AFCI, Anti-islanding, Ground fault monitoring, Grid monitoring, Residual-current monitoring unit
Physical	Dimensions (W / H / D): 440/855/256mm; Weight: 48.84kg
Operating Environment	Temperature: -25°C to +60°C with derating above 45°C; Noise Emission: ≤ 30 dB(A)
Warranty	10 Years
Compliance	IEEE1547, CA RULE21, RULE14(HECO), UL1741, UL1741SA/SB, CSA C22.2, PREPA, UL1699B, UL1741 CRD, FCC Part15 Class B, Sunspec

ZNShine 585W N-Type TOPCon Bifacial Solar Panel (42 × 585W = 24.57kW)	Details
Power Output	585W
Module Efficiency	22.65%
Type	N-Type Mono-Crystalline
Facial	Bifacial
Connection Type	MC4 Compatible
Front Load	5400 Pa
Rear Load	2400 Pa
Frame Colour	Anodized Aluminum (Black/Silver)
Backsheet	Transparent
Pallet Quantity	31 Modules per Pallet
Dimension (mm)	2278 × 1134 × 30mm
Weight	31.5 ±1.0 kg

Battery option 2 — Growatt ALP 5.0L-E2 US 5.12kWh LiFePO₄ Battery (8 × 5.12kWh = 40.96kWh nominal)	Details
Battery Type	LiFePO4 (Lithium Iron Phosphate)
Nominal Voltage	51.2 V
Operating Voltage Range	46.4 – 57.6 V
Included ALP nominal energy	40.96 kWh total; 8 modules across 2 independent clusters
Included ALP usable energy	36.8 kWh total; 18.4 kWh per four-module cluster
Maximum charge / discharge current per four-module battery cluster	220 A battery rating; actual current is limited by the connected inverter and operating conditions
Manufacturer expansion limit per battery cluster	Up to 8 modules; expansion is not included and requires a compatible system design
Installation Type	Wall-mounted / Floor-mounted
Communication	CAN
Ingress Protection	IP66 / NEMA 4X
Operating Temperature	-10°C to +50°C
Cooling	Natural Convection
Battery Management System (BMS)	Integrated Smart BMS
Monitoring Parameters	SOC, Voltage, Current, Temperature
Warranty	10 Years
Included battery configuration	2 four-module battery clusters; 8 modules total
Energy per module	5.12 kWh nominal / 4.6 kWh manufacturer-stated usable
Energy per four-module cluster	20.48 kWh nominal / 18.4 kWh usable
Maximum continuous discharge power per four-module cluster	11 kW battery rating, not inverter AC output; temperature and state of charge can cause derating

Battery option 1 — GSL Energy (4 × 14.34 kWh)	Details
Model	GSL051280A-B-GBP2F
Included quantity	4
Included nominal energy	57.36 kWh
Included usable energy	54.492 kWh (manufacturer recommended discharge energy at 95% DoD)
Battery chemistry	LiFePO₄
Nominal voltage per battery	51.2 V
Operating voltage per battery	46–56 V
Capacity per battery	280 Ah
Nominal energy per battery	14.34 kWh
Recommended discharge energy per battery (95% DoD)	13.623 kWh
Recommended charge / discharge current per battery	100 A
Maximum charge / discharge current per battery	150 A
Peak charge / discharge current per battery	200 A (2 minutes at 25°C)
Maximum continuous discharge power per battery	7.68 kW
Cycle life	≥8,500 cycles (25 ± 2°C, 0.5C/0.5C, 80% end-of-life capacity)
Operating temperature	Charge: 0°C to 55°C; discharge: −20°C to 55°C
Installation	Ground / outdoor
Ingress protection	IP65
Scalability	Manufacturer maximum: 16 units in parallel; not the included quantity
Communication interfaces	CAN 2.0, RS485, WiFi
Dimensions per battery (W × H × D)	700 × 1050 × 200 mm
Weight per battery	Approximately 134.5 kg (296 lb)
Warranty	10 years
Certifications listed in manufacturer datasheet	UL1973, UL9540A, UL9540, CB-IEC62619, CE-EMC, UN38.3, MSDS

Battery-side energy is before inverter losses. Battery current and power ratings above are per unit; actual system output is limited by the inverter, battery configuration and operating conditions. Battery certifications do not by themselves establish certification of the complete installed system.

Nominal and Usable Battery Capacity

Battery option	Nominal energy	Usable battery energy
8 × Growatt ALP 5.0L-E2 US	40.96 kWh	36.8 kWh
4 × GSL 14.34 kWh	57.36 kWh	54.492 kWh

Manufacturer figures: Growatt ALP 5.0L-E2 US provides 5.12 kWh nominal and 4.6 kWh usable per module. GSL051280A-B-GBP2F provides 14.34 kWh nominal and 13.623 kWh recommended discharge energy per module at 95% DoD. These are battery-side energy values, before inverter losses; delivered AC energy depends on operating conditions and system settings.

Common questions

Before you order.

If yours isn't here, ask an engineer. It costs nothing and it's the step most people skip.

Is the racking or mounting hardware included?

No. Rails, roof hooks, ground-mount posts and clamps depend on the roof or ground they go on, so no system ships with them. They are sold separately. The finder adds the right pack for your surface when it sizes a system, or ask us and we will match one to your roof.

Can I install it myself?

The equipment ships ready to connect, but the AC side, the grounding and any connection to the grid must be done by a licensed electrician. A grid-tied or hybrid system also needs a permit and your utility's interconnection approval before it is switched on. The wiring diagram and commissioning record we publish are for reference; they are not a stamped design, and a professional engineer's review is required where your jurisdiction calls for one.

Are the solar panels included?

Where the title names an array — “7.04 kW panels”, say — the panels are in the box and appear under What ships. A backup system whose title names no array, such as the Growatt whole-home and partial-home backup systems, is the inverter and battery only, and its listing says so. Panels for those are sold separately.

What is the difference between off-grid, grid-tie and hybrid?

An off-grid system has no utility connection: the battery carries the night and the generator input carries the dark days. A grid-tie system has no battery: it feeds your panel and the grid by day and goes dark in an outage. A hybrid system does both — it works with the grid and keeps a battery, and with its transfer switch it carries your essential circuits through an outage.

Which tax credits and incentives apply?

The 30% federal residential credit ended on 31 December 2025, and nothing on this page assumes it. Some states still run their own credits, sales-tax exemptions or generation payments; the savings estimate above lists the ones we know of for your state, and our tax credit guide explains what applies in 2026.

Can I charge from a generator?

Most off-grid inverters in the range have a generator input for charging on dark days; the specification table says whether this one does and at what current. A grid-tie inverter has no generator input. A hybrid system takes a generator through its transfer switch, if your electrician wires one in.

What if I'm not sure this is the right product?

Ask before you order. Send us what you need to run, or your pool or well figures, and an engineer will confirm the choice — it costs nothing. Or use the finder below, which sizes from what you actually run and shows its reasoning.

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20kW Hybrid Solar System with 24.57kW PV & Battery Storage

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