SolarEdge Home Battery 400V (Energy Bank)

SolarEdge Home Battery 400V - Overview

Names first, because SolarEdge sells two batteries and mixing them up wastes everybody's time. This page is about the 9.7 kWh unit that launched as the SolarEdge Energy Bank and is now marketed as the SolarEdge Home Battery 400V, part number BAT-10K1PS0B. It's an NMC battery on a roughly 450 V DC bus. The separate SolarEdge Home Battery 48V is a different product entirely: LFP chemistry, 4.6 kWh per module, one to five modules for 4.6 to 23 kWh, about 54.7 kg a module.

The 400V unit pairs with a SolarEdge Home Hub inverter (the line SolarEdge used to call Energy Hub). DC coupling, where the battery charges straight off the array's DC output instead of going out through the inverter and back, delivers a round-trip efficiency above 94.5% against roughly 90% for a good AC-coupled battery. On a system that cycles daily from solar, that gap compounds.

The 8,500 USD price here is hardware. EnergySage puts a complete installed SolarEdge battery job between 10,000 and 20,000 USD, so budget accordingly.

DC Coupling Efficiency Advantage

In an AC-coupled system such as the Enphase IQ Battery 5P, solar DC becomes AC at the inverter, then DC again to charge the battery, then AC again to run the house. Three conversions, each losing a few percent. DC coupling charges the battery directly and converts once on the way out. Enphase publishes 90% round trip; this battery publishes above 94.5%. On 9.7 kWh a day at 0.30 USD/kWh, the roughly 4.5-point advantage works out near 48 USD a year. Modest. It just doesn't stop.

SolarEdge Home Hub Integration

The Home Battery 400V needs a SolarEdge Home Hub inverter. It won't run on a plain HD-Wave SE6000H or an older SolarEdge string inverter. Watch the suffix, though: SolarEdge sells a Home Hub inverter under the same SE6000H prefix with a different suffix, and that one does take a battery. Read the full part number on the quote, not the first seven characters.

The Home Hub gives one interface for solar production, battery state of charge, grid import and export, and EV charging, all from the mySolarEdge app. It can run for self-consumption, time-of-use arbitrage, or backup priority.

Modular Architecture

A single unit provides 9.7 kWh usable, and all of it is usable - depth of discharge is 100%. Up to three units connect per Home Hub inverter for 29.1 kWh total, which covers EV charging or a couple of days of careful backup.

Chemistry, and Why It Matters Here

An earlier version of this page called this an LFP battery and sold it on the absence of thermal runaway risk. That was wrong, and it's worth correcting plainly rather than quietly. The 400V battery is NMC. NMC packs more energy into less wall space and weighs less per kWh; LFP tolerates abuse better and is the chemistry people mean when they talk about thermal safety margins. If chemistry is what drives your decision, ask about the SolarEdge Home Battery 48V instead - that's the LFP one, and it's the same manufacturer and the same app.

None of which makes this a dangerous product. It's UL 9540 listed, and NMC packs run in hundreds of thousands of homes. But you should buy it knowing what's in it.

Who Should Buy It and the Catch Nobody Mentions

This battery is for households already committed to the SolarEdge platform on a Home Hub inverter. That's the whole pitch and also the whole problem. Retrofitting one onto an existing HD-Wave install means swapping the inverter too, and at that point you're pricing a different project.

The honest trade-offs are weight and cold. At 121 kg this is a two-person, brackets-into-studs job, and SolarEdge's published charging window starts at 0 deg C. US distributor listings give it a NEMA 3R enclosure, so an exterior wall is allowed, but an unheated wall in a cold climate still costs you winter charging exactly when you want backup most. My take: the efficiency edge is real and the Home Hub lock-in is not a dealbreaker if you're specifying a new system. Bolting it onto an old one later is the expensive path. Buy it with the inverter, or don't bother.

Key Advantages

• DC-coupled efficiency - greater than 94.5% round trip, near the top of what residential storage achieves
• NMC chemistry - high energy density in a compact wall-mounted box
• 9.7 kWh per unit, 100% usable - modular stacking to 29.1 kWh
• Unlimited cycles and throughput - 10 years to 70% capacity with no cycle counting
• Home Hub integration - solar, battery and EV management in one inverter
• NEMA 3R enclosure - wall or floor mount, indoors or out, though the 0 deg C charge floor still applies

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Related guides: SolarEdge SE6000H HD-Wave String Inverter · SolarEdge P370 Power Optimizer