Does the battery work during a power outage?

Yes, if the inverter has a backup function (most hybrid inverters do). When the grid fails, the system switches to the battery and powers essential circuits. In a hybrid kit, this function is configured from the start.

Can I add batteries later?

Yes. The BRLV series expands in parallel up to 16 modules — you can start with one battery and add more as your consumption grows — say you get an EV or a heat pump — without changing what you already have.

Why LiFePO4 and not another lithium type (NMC)?

LiFePO4 is the safest lithium chemistry: it does not go into thermal runaway under overload and does not ignite. It also has 2–3 times more cycles than NMC (6,000+ vs 2,000–3,500) and degrades much more slowly — exactly what you want for a battery that charges and discharges daily.

How long does a BRLV battery last?

The cells are certified for ≥ 6,000 cycles at 80% DOD. At one cycle per day, that is over 16 years in theory; in practice we are talking about more than 10 years of daily use, with slow and predictable degradation.

Which inverters are they compatible with?

The 51.2 V batteries work with BR Solar, Solis hybrid inverters and most major 48 V brands. BMS-inverter communication is via RS485 / CAN. Tell us which inverter you have and we confirm compatibility before quoting.

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LiFePO4 batteries — BRLV series

Name: BRLV-300 — LiFePO4 batteries 15.36 kWh (51.2 V · 300 Ah)
Brand: BR Solar
Price: 2100 EUR
Availability: InStock

Store the solar energy you produce during the day and use it in the evening, when you consume the most.

Ultra-safe lithium iron phosphate chemistry, ≥ 6,000 cycles at 80% DOD and a smart BMS with online monitoring. From 5.12 to 15.36 kWh, expandable up to 16 modules in parallel.

LiFePO4 · ultra-safe≥ 6,000 cyclesExpandable 16× in parallel

Request a battery quote See the models

Backup & independence

Stop caring when the power goes out

The first argument for a home battery isn't the money — it's peace of mind: your home keeps running, whatever happens on the grid.

Automatic switch-over at an outage

When the grid fails, a hybrid inverter with a backup function switches to the battery automatically: the essential circuits — fridge, lighting, internet, heating — stay powered.

Independence from the grid

Your evening consumption comes from the energy you produced during the day. You are less exposed to grid prices and grid faults.

Bonus: the bill goes down too

And on top of that, your bill shrinks as well — see the calculation below

How it works

Why a LiFePO4 battery at home?

Without a battery, the midday surplus from your panels is injected into the grid at a low price, and in the evening you buy it back at a high price. The battery stops this loss: it stores the daytime surplus and delivers it exactly when you need it, in the evening and at night.

LiFePO4 (lithium iron phosphate) chemistry is the safest in the lithium class: it does not ignite under overload, withstands thousands of cycles without significant degradation and operates stably across a wide temperature range.

✓No more selling your daytime surplus cheap and buying it back at a premium in the evening

✓Uninterrupted supply to essential loads during power outages

✓LiFePO4 chemistry — does not ignite under overload, unlike NMC

Daytime

The panels power the home; the surplus charges the battery.

Evening

Production drops, but the battery takes over the home load.

Night

Base consumption comes from the battery, not the grid.

Outage

Essential loads stay powered automatically.

The key numbers

≥ 6,000

Cycles at 80% DOD

Over 10 years of daily use — LiFePO4 cells with slow degradation.

16×

Expandable in parallel

Start with one battery and add modules as your needs grow.

51.2 V

Broad compatibility

Works with BR Solar, Solis and most inverter brands.

−20…+58 °C

Operating range

Wall or floor mounting, with online monitoring via BMS.

The BRLV range

Three capacities, the same technology

All models: 51.2 V, LiFePO4 cells, smart BMS with online monitoring and parallel expandability. You choose the capacity based on your daily consumption.

BRLV-100

5.12 kWh

51.2 V · 100 Ah

Recommended: low consumption / minimal backup

Nominal power6 kW

Weight≈ 45 kg

Mountingwall / floor

on request

Request a quote

How the battery works on a sunny day

The midday surplus isn't free: without a battery, your supplier compensates it quantitatively — but only the active energy. When you store it, the real cost of charging is the compensation you give up; in return, in the evening you avoid the full grid price, network tariffs included.

Compensation covers only the active energy — you still pay the network tariffs either way. The battery avoids them entirely.

Illustrative example: 10 kWh battery, indicative prices (compensation ~0.65 lei/kWh · full grid price ~1.3 lei/kWh); the real profile depends on consumption and season.

Grid energy avoided (full price)Quantitative compensation lost

Compensation you give up

−6.5 lei

Grid energy avoided

+11.7 lei

Net per day (summer)

≈ +5 lei

Technical specifications

The common characteristics of the BRLV series — chemistry, BMS, operating environment and certifications.

Chemistry & energy

Cell typeLiFePO4 (lithium iron phosphate)

Voltage51.2 V (44.8–58.4 V)

Capacities5.12 / 10.24 / 15.36 kWh

Cycles≥ 6,000 at 80% DOD

Lifespan> 10 years

BMS & communications

BMSsmart, online monitoring

BMS current150 A max.

ProtocolsRS485 / RS232 / CAN

Protectionsnano-coating, cell self-healing

Environment & mounting

Temperature−20 … +58 °C

Mountingwall or floor (on casters)

Expandabilityup to 16 modules in parallel

Certifications & compatibility

CertificationsCE · IEC 62619 · UN 38.3

InvertersBR Solar, Solis, most 48 V brands

Source: BR Solar BRLV series datasheet and VistaVerde offer. Full PDF datasheet available on request.

Want the complete turnkey system?

In a hybrid kit you get the inverter, battery, installation and commissioning in a single offer — with a final price agreed before the start.

See the 5–15 kW hybrid kits

FAQ

Frequently asked questions about batteries

Simple rule: the battery should cover your evening and night consumption, when the panels do not produce. For an average home (~20–25 kWh/day) a 10 kWh battery typically covers the evening load; for large homes or those with a heat pump, 15 kWh or two modules. We calculate your exact capacity free of charge, based on your consumption.

Find out which battery capacity fits you

Send us your monthly consumption and which inverter you have (or want). We'll get back to you within 48 hours with the recommended capacity and a final offer.

Request a project analysis

Reply within 48h · Technical recommendation · Final agreed price