Batteries we build by hand, to order.
12, 24 and 48 V battery storage for home PV systems, off-grid systems, motorhomes and backup power. Built from EVE grade A cells, with the BMS configured directly for your inverter.
in Czechia
Depending on what you power.
The voltage is determined by the inverter you connect the battery to. We then size the capacity to your consumption. Not sure? Send us your inverter type and what you want to power.
Home PV and backup
From 5 to 16 kWh in a single battery, up to 16 batteries in parallel. For low-voltage hybrid inverters from Deye, Victron, GoodWe ES/EM, Growatt and others.
Motorhomes, caravans and cabins
Replacement for lead-acid batteries: 105 to 640 Ah, CAN for Victron Cerbo GX, HEAT heating for winter. Also for backup power supplies and UPS.
Off-grid systems and boats
24 V off-grid systems in cabins and garages, Victron systems, electric boat motors. 105 to 320 Ah in an AkuBox or a compression box.
Deye hybrid inverters
We supply them with the battery, set up communication between the battery and the inverter and help with commissioning remotely.
We measure every cell. We configure every BMS for a specific inverter. And if something doesn't make sense, we say so straight away.
- Production
- By hand in two workshops — near Klatovy and near Ostrava
- Cells
- EVE grade A
- Payment
- No deposit, payment only before dispatch
- People
- Petr Baxa · Michal Komenda
Which inverters they work with.
Our batteries are low-voltage. They communicate with the inverter via CAN or RS485, and we configure the BMS for the specific model. They do not work with high-voltage (HV) inverters.
…and other low-voltage inverters that support lithium batteries. Send us the exact model — we will check it in advance.
| Voltage | Cells | Typical use |
|---|---|---|
| 12.8 V | 4 in series | motorhomes, caravans, cabins, UPS |
| 25.6 V | 8 in series | off-grid systems, electric boat motors |
| 48 V | 15 in series | inverters with a lower battery voltage range, parallel operation with Pylontech |
| 51.2 V | 16 in series | home PV, home backup |
BAKOM BMS and BAKOM Cloud — your battery on your phone and on the web.
Our own app, developed in the Czech Republic, for iPhone, iPad and Android — free for BAKOM batteries and without ads. On the BAKOM Cloud web portal you have your batteries, their history and settings in one place — at home and on the go.
- State of charge, power, individual cell voltages and temperatures
- Multiple batteries in one overview
- Diagnostics and BMS event log
- Remote support — a technician looks at the battery remotely, only when you allow it
- BAKOM Cloud: measurement history and comparison of BMS settings; add a battery using the QR code on its label
- Czech, Slovak, English
Tests, wiring and experience from the workshop.
On the ElektroMaster YouTube channel, Petr Baxa shows how we build our batteries, how to connect them to inverters and how they behave in real-world use — including in frost. A new episode usually comes out every other Friday.
What you ask us.
You will find more answers on the individual battery pages. Or write to us — we are happy to help.
How long does delivery take?
We build batteries by hand to order and do not keep them in stock. After your inquiry we will confirm the current lead time and add you to our order queue. The reservation is free and non-binding; we will contact you before production starts.
Do I pay a deposit?
No. We build and test the battery, then send the invoice, and once the payment arrives we ship it. For collection in person, you can pay on the spot.
How will you deliver the battery?
We send smaller batteries via PPL. Large batteries (a 16 kWh unit weighs roughly 100 kg) travel on a pallet. We state the delivery cost in our quote. Collection in person is free, by appointment, from our workshop near Klatovy or near Ostrava. We also deliver to Slovakia. Delivery to other EU countries is arranged individually for each order.
Will the battery work with my inverter?
With low-voltage inverters, yes — Deye, Victron, GoodWe ES/EM series, Growatt, Voltronic/Axpert, MUST, Luxpower and others. Our batteries do not work with high-voltage (HV) inverters. We configure the BMS directly for your inverter; just tell us its model.
Can I expand the capacity later?
Yes. 48 and 51.2 V batteries with BMS+ are connected in parallel and work as a single bank — two to four batteries are common in home PV systems. We can also run them alongside an existing Pylontech battery (15-cell configuration).
Do you also install it?
Installation is carried out by your electrician. We help with the design and choice of components, prepare a recommended wiring diagram and supply the battery with the BMS configured for your inverter. During commissioning we are available by phone and remotely.
Will the battery cope with frost?
Below +1 °C the BMS blocks charging to protect the cells; discharging is possible down to −22 °C. For unheated spaces, cabins and motorhomes in winter there are variants with HEAT heating.
What is the warranty?
4 years on the cells. Every battery comes with a warranty certificate and a manual in Czech. Please do not interfere with the BMS protection settings — changing the protection configuration voids the warranty. Warranty and claims
Tell us
what you need.
Describe what you need the battery for — appliance or inverter, daily consumption, available space. We will design a system and send you the price in writing.
- baterie@bakom.czInquiries, orders and technical questions
- Bronislava Baxová
- +420 737 344 853Orders, lead times, invoices and dispatch
- Petr Baxa
- +420 603 552 577Production, wiring of batteries and Deye inverters
- Michal Komenda
- +420 602 564 571Technical matters, off-grid systems and Victron, BAKOM BMS app
- Workshops
- Svrčovec near Klatovy and Krmelín near OstravaVisits and collection by appointment only