Comparing home battery quotes by price per kWh is misleading — unless you know what's inside the box. A "$300/kWh" battery that excludes the inverter, mounting brackets, and cables costs more than a "$450/kWh" all-in-one system that ships ready to install. Always compare usable kWh (not nameplate) and the complete BOM, not the headline number.
The Trap: Comparing $/kWh Across Different Scopes
A distributor shopping three quotes sees:
| Quote | Headline price | What's included |
|---|---|---|
| Supplier A | $280/kWh | Battery only, 100% DoD marketing number |
| Supplier B | $420/kWh | Battery + inverter + brackets + cables |
| Supplier C | $550/kWh | All-in-one, installed, 10-year warranty |
On paper, Supplier A wins. On site, Supplier A's customer buys a $280/kWh pack, then spends $1,500 on an inverter, $200 on brackets, $150 on cables, and discovers the marketing "10kWh" only delivers 8kWh usable because the DoD is 80%. The real installed cost per usable kWh ends up higher than Supplier B.
Number 1: Nameplate vs Usable Capacity
LiFePO4 batteries are marketed by nameplate kWh, but you don't get all of it.
- The Dawnice HZEB-LCT-10 is rated at 10.24 kWh nameplate. At 90% DoD, usable energy is 9.2 kWh.
- A competitor quoting 10 kWh at 80% DoD delivers 8 kWh usable.
- The $/usable kWh — not the $/nameplate kWh — is the number that matters.
When you compare quotes, divide the total system price by the usable kWh (nameplate × DoD), not by the nameplate figure.
Number 2: Is the Inverter in the Price?
This is the biggest scope gap. A "battery" quote is often just the battery cabinet. The hybrid inverter is a separate line item.
| Product line | What's in the box |
|---|---|
| HZEB-LCT-5/10/16/20 | Battery only — pair with DWH series hybrid separately |
| BS06-S 15.36–46.08kWh | Battery stack only — pair with HV hybrid inverter |
| 6kW/10kWh All-in-One | Inverter + battery, pre-matched |
| LumiSun-32K 32.14kWh | Three-phase inverter + battery, single cabinet |
The wall-mounted and stackable lines are battery-only. The all-in-one lines bundle the inverter. A $350/kWh battery-only quote versus a $600/kWh all-in-one isn't apples-to-apples — you're adding $800–$2,000 for a DWH hybrid on the battery-only side.
Number 3: What Else Is Missing
Walk down the BOM before you sign:
- Mounting brackets: wall studs, masonry bolts, rail kits
- DC cables: battery to inverter, usually 1–5 meters
- AC backup box: essential-load transfer switch
- CT clamp and energy meter: for self-consumption control
- Wi-Fi / communication dongle: remote monitoring
- Warranty: 5 years standard, 10 years extended
Our USA 100kWh residential project initially quoted battery-only, then added the DWH 8–15K split-phase inverter, backup panel, and CT meter. The final system cost per usable kWh was 40% higher than the headline — but it was a complete, install-ready system, not a cabinet sitting on a pallet.
Number 4: Cycle Life Throughput
Price per kWh ignores how many kWh the battery will actually deliver over its life. A cheap pack rated at 4,000 cycles at 80% DoD delivers less total energy than a Dawnice HZEB-LCT rated at 6,000+ cycles at 90% DoD. The $/kWh-cycled over the warranty period is the real comparison.
Ask the supplier: what's the throughput warranty in MWh? That number — not the cycle count at 25°C lab conditions — is what determines cost over 10 years.
When a customer sends us three quotes to compare, we rebuild them on a spreadsheet: usable kWh, inverter included, brackets included, cables included, throughput warranty. The cheapest headline quote rarely wins once those columns are filled in.
Send us your competing quotes — or the configuration you're thinking of — and Ruibit Energy will show you the real $/usable kWh on a complete, install-ready Dawnice system, not a cabinet-only number.
Frequently Asked Questions
Q1: What is a good price per kWh for a home battery?
It depends on what's included. Battery-only LiFePO4 packs typically run $250–$400/kWh nameplate. All-in-one systems with inverter pre-matched run $500–$700/kWh. Always compare on usable kWh (nameplate × DoD) and on a complete BOM, not the headline figure.
Q2: Why is usable capacity lower than the rated kWh?
LiFePO4 batteries are not discharged to 0%. The Dawnice HZEB-LCT series uses a 90% depth of discharge — a 10.24 kWh unit delivers 9.2 kWh usable. Some cheaper packs quote 80% DoD, which means even less energy per nameplate kWh.
Q3: Does the quoted price include the inverter?
Not always. The HZEB-LCT wall-mounted and BS06-S stack lines are battery-only — you add a DWH series hybrid separately. The all-in-one units (6kW/10kWh, LumiSun-32K) bundle inverter and battery from the factory. Always confirm before comparing.
Q4: What other costs should I budget for beyond the battery?
Typically 15–25% on top of the battery price: mounting brackets, DC cables, backup transfer box, CT meter, Wi-Fi dongle, and commissioning. For our USA 100kWh residential project, these accessories added 40% to the initial battery-only quote.
Q5: How does cycle life affect the real price?
A cheaper pack rated at 4,000 cycles delivers less total energy over 10 years than a 6,000+ cycle unit. Compare the throughput warranty in MWh, not the cycle count at lab conditions. The $/kWh actually delivered over the warranty period is the real number.
