6.65kWh Solar Backup: SimpliPHI 48V LiFePO4 Battery + 6.5kW Phocos 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 6.65kWh Solar Backup: SimpliPHI 48V LiFePO4 Battery 6.5kW Phocos Any-Grid Hybrid Inverter ESS Kit is a pre-engineered solar battery backup system for home use, bundling a 6.65kWh LiFePO4 battery module with a 6,500W hybrid inverter — both components confirmed compatible at 48V and sized to work together. Offered through A1 SolarStore as a matched set, this energy storage system removes the guesswork of pairing a battery and inverter from separate sources and having the right charge parameters on hand before installation.

What's included

• SimpliPHI 6.6 Battery (052015 / SPHI-6.6-LO) — 1× 6.65kWh LiFePO4 battery module, 48V nominal
• Phocos PSW-H-6.5KW-120/48V — 1× 6.5kW single-phase hybrid solar inverter/charger

One purchase, one verified system

Building a home energy storage system from individual components means verifying voltage compatibility, charge-rate limits, and cutoff thresholds — then manually programming those parameters into the inverter before commissioning. This kit removes the research side of that process. The SimpliPHI 6.6 Battery and the Phocos PSW-H-6.5KW-120/48V are pre-matched at 48V, and the correct charge profile for the SimpliPHI (float, boost, equalization, and low-voltage cutoff voltages) is configured manually on the Phocos inverter at setup — no automated BMS handshake is required or used between these two components.

Who this kit fits

• Home backup power — 6.65kWh of usable LiFePO4 storage covers essential loads (refrigeration, lighting, critical circuits) through a typical overnight outage without a generator
• Solar self-consumption — charge from your PV array during the day via the dual MPPT inputs and draw from the battery after sunset to reduce grid dependence and lower utility bills
• Off-grid and hybrid operation — the Phocos PSW-H supports both fully off-grid and grid-tied hybrid configurations, with automatic source switching between PV, battery, grid, and generator
• Small to mid-size residences — sized for a 1,000–2,500 sq ft home or cabin that needs reliable backup without the cost of oversizing
• Scalable starting point — expand the battery bank to 18 modules (~119.7kWh) or parallel up to 9 Phocos inverters as energy needs grow, without replacing core components

How the system connects

The SimpliPHI 6.6 Battery connects to the Phocos PSW-H-6.5KW-120/48V on the 48V DC bus. These two components do not communicate over BMS protocol — charge parameters (float at 55.2V, boost at 57.6V, low-voltage cutoff at 44V, and related thresholds) are entered manually into the Phocos inverter during commissioning using SimpliPHI's published charge settings. Solar panels feed into the inverter's dual MPPT inputs (2× 90–230Vdc, up to 5,000Wp each), which charge the 48V battery bank and simultaneously supply connected loads at 120Vac. When grid or generator power is available, the inverter uses it as a secondary charge source or pass-through for loads during low-solar periods. Buyers will also need DC and AC breakers, conduit, mounting hardware, and all interconnect wiring sized to their specific installation — contact our team for a custom equipment list before installation.

Why choose this solar backup kit?

This kit takes the sourcing and compatibility work out of residential energy storage: both components are pre-matched and confirmed to operate together at 48V, so installation teams can focus on wiring rather than troubleshooting. The SimpliPHI 6.6 Battery's LiFePO4 chemistry delivers up to 6,000 cycles at 80% depth of discharge and ≥96% round-trip efficiency — a meaningful lifespan advantage over standard lithium-ion cells, backed by a 10-year warranty. Paired with the Phocos PSW-H-6.5KW-120/48V's dual MPPT inputs (up to 8,000W combined usable PV), 120A charge current capacity, and 9-unit parallel expandability, this 6.65kWh Solar Backup Kit available through A1 SolarStore delivers a complete, scalable solar battery backup system for home and small commercial installations — with charge parameters that are straightforward to configure at commissioning using SimpliPHI's published voltage settings.