Selection by parameters

Batteries for Solar Panels

Batteries for solar panels: what capacity to size for your home

Customers buy batteries for solar panels in two cases. First: offline mode during blackouts – the customer wants fridge, gas boiler, lights and a few outlets to run 6-12 hours without grid. Second: storage for night-time consumption under net metering. A typical customer this year is a 100-150 m² homeowner with 4000-7000 kWh/year consumption, installing a 5-15 kWh battery alongside a 5-10 kW hybrid inverter.

The chemistry we install in 2026: LiFePO4 (lithium iron phosphate). Why not lead-acid: 5000-6000 cycles vs 500-800 on AGM, 90% depth of discharge vs 50%, three times lighter, no off-gassing on charge. Why not NMC: LiFePO4 is safer thermally (no thermal runaway on overcharge) and 20-30% cheaper per kWh in 2024-26. Our warehouse stocks Pylon US-series, Deye SE-G5.1 Pro, Volts. We also stock EcoFlow.

First question we ask: how many kWh do you need

Baseline math: a typical 150-200 m² home gets 5 kWh (one battery). That covers 6-8 hours of fridge, boiler, lights, internet, laptops. A house with a heat pump, electric water heater or electric stove takes 10-15 kWh (2-3 batteries). Full off-grid without mains: 15-20 kWh plus a generator for winter weeks. Without a PV array, the battery charges from grid at night on the cheap tariff, but that is a different scenario altogether.

What else we ask before ordering. First: which inverter you run, because the comms protocol (CAN BUS, RS485) must match. Pylon US3000C pairs with most Deye, Veichi, Solis units; Deye SE-G5.1 Pro pairs with its own SUN-K series. Second: do you plan to expand capacity – Pylon US lets you stack up to 16 batteries (80 kWh), Volts up to 4 modules. Third: where you put it – LiFePO4 dislikes frost below -10°C during charging (it discharges down to -20°C), so an unheated garage or basement requires a thermal cabinet or relocation to a heated space. Warranty 5-10 years depending on the brand. We ship from Kyiv in 1-3 days.

ModelCapacity, kWhVoltage, VCyclesApplication
Veichi VCLB-5K-D015.1251.26,000Apartment, small house
Felicity LPBA48100-OL5.12486,000+Home power station
Rosen BAT-51.2V-200AH10.2451.26,000+House, small production facility
Felicity LPBF48200-H10.0486,000+Medium house, office
Felicity LPBA4850025.0486,000+Large house, farm

Manufacturers of batteries for solar panels

Our catalog features batteries from verified manufacturers with proven sales in Ukraine:

  • Felicity: capacities from 5 to 25 kWh, Grade A LiFePO4 cells, built-in BMS, 6,000+ cycles. The broadest selection of capacities for cascade connection.
  • Veichi: industrial-grade quality, precise specifications (BMS with CAN/RS485), wall-mount and floor-mount options. Models at 5 and 10 kWh.
  • Rosen: rack-mount and wall-mount solutions. 5 and 10 kWh capacity. BMS with CAN/RS485.

Batteries for solar panels by specifications

Warranty & support

All batteries come with an official manufacturer warranty. Delivery across Ukraine via Nova Poshta and Delivery services. Our engineers will help calculate required capacity, select a compatible hybrid inverter together with solar panels for a complete system. Consultation is free of charge.

Frequently Asked Questions

Which batteries suit solar panels?

Deep-cycle lithium iron phosphate (LiFePO4) packs at 51.2 V. An inverter datasheet calls the same input a 48 V battery terminal. In stock we hold Felicity, Rosen and Veichi from 5.12 to 25 kWh, in wall-mounted or rack format. Do not use a starter car battery: it is built for a short cranking discharge and falls apart within months of daily deep cycling.

Can a battery be wired straight to a solar panel?

No. Panel voltage drifts with irradiance and temperature, so an MPPT controller always sits in between: either standalone or built into the hybrid inverter. The inverter holds the correct charge profile and reads pack status from the BMS over CAN or RS485. Wiring a panel straight to a battery kills it.

48 volts, 51.2 V, 200 amps: how do these relate?

The 48 V figure comes down from lead-acid practice, and inverter battery inputs are still labelled that way out of habit. The real voltage of a lithium string of 16 cells at 3.2 V each is 51.2 V. It is the same pack. Amp-hours quoted without voltage, on the other hand, say nothing about stored energy: 100 Ah at 51.2 V gives 5.12 kWh, 200 Ah gives 10.24 kWh. Count in kilowatt-hours.

What capacity does a 5–10 kW installation need?

Size it against overnight consumption, not against array power. 5.12 kWh carries a fridge, lighting, router and boiler pump until morning. 10–12.5 kWh runs a whole house. From 15 kWh covers electric heating or a round-the-clock load. There is a second constraint too: the inverter charge current. A small pack physically cannot absorb the full midday surplus from the array.

Why are lithium batteries better than gel for solar?

Usable capacity and cycle life. LiFePO4 is routinely taken to 80–90% depth of discharge, while gel and lead-acid must not go much below half or they degrade fast. So for the same nameplate figure lithium delivers twice the energy. Storage life is also counted in charge cycles rather than calendar years, and under the pattern typical for Ukraine, where the pack carries the house through outages instead of being run flat every night, a lithium string lasts markedly longer than a lead one.