16kWh Whole Home Backup: MidNite Power 48V LiFePO4 Battery + 18kW Sol-Ark Hybrid Inverter - ESS kit

This kit includes the primary components listed below. Additional wiring, mounting hardware, or balance-of-system equipment may be required depending on your installation requirements. Contact our team for a personalized equipment review and custom add-on pricing.

The 16kWh Whole Home Backup: Midnite Solar 48V LiFePO4 Battery (MidNiteSolar version) 18kW Sol-Ark Hybrid Inverter ESS Kit is a pre-engineered solar battery backup system that pairs a 16kWh wall-mount LiFePO4 battery with a 18,000W hybrid inverter — both selected and verified for full closed-loop compatibility. Rather than sourcing and cross-referencing components individually, this ESS kit gives residential and light commercial buyers a single, pre-matched 48V energy storage solution ready for backup power, solar self-consumption, or off-grid operation.

What's included

• MidNite Power MNPowerflo 16 — 16kWh, 51.2V, 314Ah LiFePO4 wall-mount battery; IP65 outdoor/indoor rated
• Sol-Ark 18K-2P-LV — 18,000W single-phase hybrid inverter, 120/240Vac split-phase pure sine wave output

Component specifications

One purchase, one verified system

Building an energy storage system from separate components means hours of cross-referencing voltage windows, charge rate tolerances, and communication protocols — with no guarantee the pieces will actually work together. This kit eliminates that entirely. The MNPowerflo 16 and the Sol-Ark 18K-2P-LV share a common 48V architecture and communicate over CAN/RS485 using the PYLON protocol, so the inverter reads battery state of charge directly from the BMS for automatic charge management

Who this kit fits

• Whole-home partial backup — powers refrigerators, lights, fans, and small appliances through a grid outage without a transfer switch overhaul
• Solar self-consumption — pair with a rooftop or ground-mount PV array to reduce daytime grid draw and store surplus energy for evening use
• Off-grid cabin or workshop — 16kWh of storage paired with a 5,200W PV input ceiling covers overnight power from a typical day's solar harvest
• Light commercial facility — reliable backup for critical loads: point-of-sale systems, servers, lighting, and communications equipment
• Scalable starting point — add up to 15 additional MNPowerflo 16 units in parallel, reaching 257kWh as energy needs grow, without replacing the inverter

How the system connects

The MNPowerflo 16 communicates with the Sol-Ark 18K-2P-LV via CAN/RS485 for closed-loop BMS communication — the inverter actively monitors state of charge and adjusts charging in real time. Solar panels feed into the inverter's 3 MPPT inputs (500Vdc max OCV, up to 32.4kW supported PV), which charges the 48V battery bank and simultaneously supplies connected loads at 120/240Vac split-phase. When grid or generator power is available (120/240Vac input), the inverter uses it as a secondary charge source or pass-through for loads during low-solar periods. The 10ms transfer switch keeps connected equipment running through brief outages. Buyers will also need solar panels and racking, AC/DC overcurrent protection per local electrical code, 4/0 AWG copper battery cables with hydraulic-crimped ring terminals, and conduit.

Why choose this solar backup kit?

Where most backup kits use generic lithium cells with short warranties, this pairing uses EVE A grade LiFePO4 cells — the same grade used in electric vehicles — backed by MidNite Solar's industry-leading 15-year warranty and rated for 8,000 cycles at 77°F. The Sol-Ark 18K-2P-LV adds exceptional headroom: 32,400W of supported PV input, 350A continuous battery charge/discharge, and a 36,000W surge rating for 10 seconds mean the system starts HVAC units, well pumps, and motor loads without hesitation — even in a full grid-down scenario. For buyers who want a professionally matched ESS without the integration risk, this 16kWh Whole Home Backup kit available through A1 SolarStore pairs an IP65-rated, 8,000-cycle battery with one of the most capable residential hybrid inverters on the market.