5.12 kWh Low-Voltage Indoor Battery (51.2 V, 100 Ah)
The Deye SE-G5.1 Pro-B is a 5.12 kWh indoor lithium battery designed to store your solar power for use at night or during blackouts. It uses safe LiFePO₄ (LFP) chemistry, is stackable for bigger systems, and comes with a 10-year warranty. It’s a great match for Deye hybrid inverters and ideal for homes and small businesses wanting reliable, expandable battery storage.
BSC Renewables can design and install a complete solar-and-battery system around this model so it fits your bills, your building and your future plans.
What Is the SE-G5.1 Pro-B, in Simple Terms?
Think of the SE-G5.1 Pro-B as a strong, safe, indoor battery block that stores the extra power your solar panels make.
From Deye’s official datasheet:
- Each battery gives about 5.1 kWh total / 4.6 kWh usable storage
- Runs at 51.2 V (low-voltage, safer for homes)
- Uses LiFePO₄ (LFP) chemistry – known for stability and long life
- Can be stacked to build bigger systems – up to 64 batteries (around 327 kWh)
- Comes with a 10-year warranty
You can start with one or two units and grow from there.
Why Homeowners and Small Businesses Like This Battery
1. Store Your Solar, Use Less Grid Power
During the day, your solar often makes more than you’re using. Without a battery, that extra power just goes back to the grid for a small credit.
With the SE-G5.1 Pro-B:
- Extra solar is stored in the battery instead of being wasted
- You can use that energy in the evening and at night
- Over time, that can reduce your power bills and make you less dependent on price rises
BSC Renewables can size the battery bank to match your actual usage so you’re not over- or under-doing it.
2. Peace of Mind During Blackouts (When Paired with a Hybrid Inverter)
If you choose a system designed for backup, this battery can help:
- Keep lights, fridge, Wi-Fi and other key circuits running during grid outages
- Avoid the stress of food spoiling or being left completely in the dark
- Provide a quieter, cleaner alternative to running a generator for short outages
BSC Renewables can design a “protected loads” circuit so the important stuff stays on when the grid goes off.
3. Start Small, Add More Later
Because each module is only ~5 kWh and made to work in parallel, you can grow over time. Deye’s official documentation shows: up to 64 units in one system, totalling roughly 327 kWh.
That means:
- You might begin with one or two batteries to cut evening usage
- Add extra modules if your usage goes up – for example, after you:
- Install an EV charger
- Add more air-conditioning
- Start working from home more
- Install an EV charger
You’re not locked into today’s size forever.
4. Safe LFP Chemistry and Long Life
The SE-G5.1 Pro-B uses LiFePO₄ (LFP) cells, not older cobalt-based chemistries. Deye’s datasheet notes: ≥ 6000 cycles at 90% depth of discharge under standard test conditions.
In everyday language:
- It’s built for daily charge and discharge over many years
- LFP is widely regarded as a very stable and safe lithium chemistry
- More cycles mean better value across the battery’s life
Add in the 10-year warranty, and you’ve got a product clearly intended for long-term use.
5. Neat Indoor Installation
This model is IP20, which means it’s designed for indoor spaces – garages, plant rooms, storerooms, comms rooms and similar. Deye lists several installation options: wall-mounted, floor-mounted or mounted in a 19″ rack (with enough depth).
What you’ll notice:
- The batteries can be stacked and tidied away, not sitting loose on the floor
- They’re about 45 kg each, so they’re chunky but manageable for installers
- Once installed, they just quietly do their job in the background
BSC Renewables will choose a location that’s safe, accessible and compliant with Australian standards.
Key Specs You Get:
- Model: SE-G5.1 Pro-B
- Energy: 5.12 kWh (about 4.6 kWh usable)
- Voltage: 51.2 V (low-voltage battery)
- Capacity: 100 Ah
- Chemistry: LiFePO₄ (LFP)
- Scalability: up to 64 units (~327 kWh)
- Cycle life: ≥ 6000 cycles @ 90% DoD (under test conditions)
- Install: indoor only (IP20), wall/floor/rack
- Comms: CAN & RS485 – for talking to Deye hybrid inverters and monitoring systems
- Warranty: 10 years
If you want the full technical datasheet, BSC Renewables can provide it – but for most people, the points above are the essentials.
How BSC Renewables Works With This Battery
When BSC Renewables uses the SE-G5.1 Pro-B in a project, we typically:
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- Review your usage and goals
- Look at your power bills, roof space and tariff
- Discuss whether you care more about bill savings, backup, or both
- Work out a sensible starting size – e.g. 1, 2 or more modules
- Look at your power bills, roof space and tariff
- Design the system properly
- Match the battery to a compatible Deye hybrid inverter
- Make sure cabling, breakers and location all follow manufacturer guidelines
- Plan for the option to add more batteries later without redoing everything
- Match the battery to a compatible Deye hybrid inverter
- Install and commission
- Physically install the battery in a safe indoor spot (garage/plant room/etc.)
- Pair the battery with the inverter so they communicate correctly
- Test the system, set basic operating modes and show you how to monitor it
- Physically install the battery in a safe indoor spot (garage/plant room/etc.)
- Support over the long haul
- Help you understand the monitoring app or portal
- Check settings if your tariff or usage changes
- Be there if you want to expand the battery bank or add more solar later
- Help you understand the monitoring app or portal
- Review your usage and goals
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Ready to Get Started?
Keen to store more of your own solar instead of buying from the grid? Reach out to BSC Renewables, and we’ll design a SE-G5.1 Pro-B battery setup that makes sense for your home or business.