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RUiXU Lithi2-16 + Sol Ark 18K-2P Hybrid Inverter Bundle

RUiXU Lithi2-16 + Sol Ark 18K-2P Hybrid Inverter Bundle
$10,299.00 - $10,299.00
$10,299.00
$10,299.00 - $10,299.00
$10,299.00
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16kWh Storage · 18kW Hybrid Inverter · 36kW Surge

RUiXU Lithi2-16 + Sol-Ark 18K-2P Hybrid Inverter Bundle

This bundle pairs the RUiXU Lithi2-16 — a 16.07kWh, 51.2V LiFePO4 battery rated for 9,500+ cycles — with the Sol-Ark 18K-2P, Sol-Ark's largest residential hybrid inverter at 18,000W continuous and 36,000W of 10-second surge. It's built for homes with heavy simultaneous loads: central air, electric heat, a well pump, a shop, or an EV charger that all need to run during an outage.

The 18K-2P accepts up to 28,800W of solar across 3 MPPT trackers and runs grid-tied, off-grid, or hybrid. Buying it bundled with the Lithi2-16 means voltage, communication, and current limits are already matched. Both components carry a 10-year manufacturer warranty. Renewable Outdoors is an authorized dealer for RUiXU and Sol-Ark, and we can help size the system to your real loads before you order.

RUiXU Lithi2-16 battery and Sol-Ark 18K-2P hybrid inverter bundle
10-Year Warranty on Both
Lowest Price Guarantee
Authorized RUiXU & Sol-Ark Dealer
Free Shipping
0% APR Financing
Expert Support: (303) 876-7654

Why Buy This as a Bundle

18kW Continuous, 36kW Surge

Sol-Ark's largest residential hybrid inverter — 18,000W continuous with a 36,000W 10-second surge for hard-starting motor loads.

28,800W of Solar Input

Three independent MPPT trackers with two inputs each accept up to 28.8kW of usable PV — room for a genuinely large array.

16kWh of Usable Storage

16.07kWh in a single wall-mount cabinet with built-in wheels, expandable as your needs grow.

Pre-Matched Components

The Lithi2-16's 48V nominal voltage and 200A current ceiling sit inside what the 18K-2P supports — no guesswork about compatibility.

Rated -40°F to 140°F

An IP65/NEMA 3R enclosure rated from -40°C to +60°C means the inverter can be mounted outdoors in genuinely harsh climates.

Code-Compliance Built In

UL1741 and IEEE1547-2018 listing, UL1699B PV DC arc-fault detection, ground-fault detection, and Type II DC/AC surge protection.

What's Included

RUiXU Lithi2-16 51.2V 314Ah LiFePO4 battery

RUiXU Lithi2-16 Battery

  • 51.2V, 314Ah, 16.07kWh LiFePO4 battery
  • Wall-mountable cabinet with built-in wheels
  • Integrated BMS with Canbus/RS485 communication
  • 10-year limited manufacturer warranty
Sol-Ark 18K-2P hybrid inverter

Sol-Ark 18K-2P Hybrid Inverter

  • 18,000W continuous split-phase hybrid inverter
  • 3 MPPT trackers, 2 PV inputs per tracker
  • IP65 / NEMA 3R outdoor-rated enclosure
  • 10-year manufacturer warranty

Bundle Specifications

RUiXU Lithi2-16 Battery

Nominal Voltage 51.2V
Nominal Capacity 314Ah @ 0.2C
Nominal Energy 16.07kWh
Cell Chemistry LiFePO4 (Lithium Iron Phosphate)
Cycle Life ≥9,500 cycles @ 80% DOD
Operating Voltage Range 44.8V–56.0V
Charge Voltage 56.8V
Recommended Charge Current 140A
Max Charge Current 200A
Recommended Discharge Current 100A
Max Discharge Current 200A
Dimensions (H×W×D, with wheels) 36.3" × 21.3" × 10"
Weight ~320 lbs
Warranty 10-Year Limited Warranty

Sol-Ark 18K-2P Hybrid Inverter

Type Hybrid (grid-tied, off-grid, or hybrid operation)
Continuous AC Power 18,000W
Surge Power (10s) 36,000W
Nominal AC Voltage 120/240V or 208V
Continuous Output Current 75A
Max Usable PV Power 28,800W
MPPT Trackers 3 independent trackers, 2 PV inputs per tracker
MPPT Voltage Range 150–425V
PV Startup Voltage 125V
Peak Efficiency 97.6%
Battery Support Lithium or lead-acid, 48V nominal (40–60V), 50–9,900Ah
Operating Temperature -40°F to 140°F (-40°C to +60°C), derating above 113°F (45°C)
Enclosure Rating IP65 / NEMA 3R
Dimensions (H×W×D) 33.98" × 18.27" × 11.10" (863 × 464 × 282mm)
Weight 137 lbs (62.4 kg)
Certifications & Protections UL1741, IEEE1547-2018, UL1699B PV DC AFCI, ground-fault detection, Type II DC/AC surge protection, integrated AC breaker
Warranty 10 Years

Sol-Ark 18K-2P figures come from Sol-Ark's own current 18K datasheet (model Limitless 18K-2P-LV, also listed as 18K 2P-N), whose continuous power, surge, output current, PV capacity, dimensions, and weight match this listing exactly. RUiXU Lithi2-16 figures are from RUiXU's own Lithi2-16 operation manual and product page. We've deliberately left an IP rating off the battery row: RUiXU's product page states IP55 while their own manual lists no rating at all, so rather than assert a figure we can't confirm, please call us if the exact ingress rating matters for your install location.

Documentation & Downloads

RUiXU Lithi2-16 Operation Manual (PDF) Sol-Ark 18K-2P Datasheet (PDF) Sol-Ark 18K-2P Installation Manual (PDF) Sol-Ark 18K-2P Quick Start Guide (PDF)

10-Year Warranty on Both

The RUiXU battery and the Sol-Ark inverter each carry a full 10-year manufacturer warranty.

Lowest Price Guarantee

Found this bundle cheaper elsewhere? Call us at (303) 876-7654 before you buy.

Authorized Dealer

Genuine hardware from both manufacturers, full warranty support, and expert sizing advice.

RUiXU Lithi2-16 + Sol-Ark 18K-2P Bundle: Frequently Asked Questions

Should I get the 18K-2P or the 15K bundle?
Go with the 18K-2P if you have large simultaneous loads — central air plus an electric range plus a well pump, a workshop, or an EV charger — or if you're planning a big solar array. It delivers 18,000W continuous and 36,000W of surge versus the 15K's 15,000W, and accepts 28,800W of PV versus the 15K's smaller array capacity. If your home's peak demand is more modest, the 15K bundle is the better value.
What does 36,000W of surge power actually do for me?
Surge headroom is what lets motor-driven equipment start. A well pump, air conditioning compressor, or large shop tool can briefly draw several times its running wattage at startup. With 36,000W available for 10 seconds, the 18K-2P can absorb those spikes without tripping — which matters most when you're running on battery during an outage.
How long will 16kWh of storage run my house?
It depends on your loads. A household drawing 1kW average — lights, fridge, internet, electronics — would see roughly 14 to 15 usable hours. Running central air conditioning or electric heat will cut that to a few hours. Given the 18K-2P's capacity, many buyers add a second battery; call us at (303) 876-7654 and we'll work through your load list.
Can I add more batteries later?
Yes. The Sol-Ark 18K-2P supports 48V battery banks from 50Ah up to 9,900Ah, so there's substantial room to add Lithi2-16 capacity as your needs grow. Talk to us about parallel wiring and communication setup before you expand.
How much solar can I connect?
The 18K-2P accepts up to 28,800W of usable PV power across 3 independent MPPT trackers with 2 inputs each, within an MPPT window of 150–425V and a 125V startup voltage. Your installer will size string lengths to stay inside that window at your coldest expected temperature.
Can it be installed outdoors in a cold or hot climate?
The inverter is rated IP65 / NEMA 3R and specified from -40°C to +60°C (-40°F to 140°F), with output derating above 45°C (113°F) — so it handles genuinely harsh outdoor conditions. The RUiXU battery is a different story: RUiXU's product page and manual don't agree on an ingress rating, so call us at (303) 876-7654 to confirm siting rather than relying on a figure we can't verify.
Does it work grid-tied, off-grid, or both?
Both. The Sol-Ark 18K-2P is a true hybrid inverter, so it can run grid-tied with battery backup, fully off-grid, or in a hybrid mode using grid power as an assist — the same hardware follows you if your setup changes.
Is this system code-compliant for a permitted install?
The 18K-2P carries UL1741 and IEEE1547-2018 listing with UL1699B PV DC arc-fault detection, ground-fault detection, Type II DC/AC surge protection, and an integrated AC breaker — the safety features inspectors generally look for. Permitting requirements still vary by jurisdiction, so confirm specifics with your local authority and installer.
Do I need a licensed electrician to install this?
Yes, we strongly recommend it. This system involves high-current DC battery wiring, split-phase AC service connections, grounding, and rapid shutdown provisions — work that needs to be done by a licensed electrician familiar with your local code and inspected before commissioning.
What's covered under warranty, and do you offer financing?
Both components carry a 10-year manufacturer warranty — RUiXU covers the battery and Sol-Ark covers the inverter — and as your retailer we can help you navigate either claim. We also offer 0% APR financing through Affirm at checkout and back this bundle with our Lowest Price Guarantee. Call us at (303) 876-7654.
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