Fogstar 48V 32kWh Battery

Fogstar 48V 32kWh Battery for UK solar and battery storage

The Fogstar 48V 32kWh Battery gives larger homes, whole-home backup designs, farms and small commercial sites with high evening or overnight demand a larger, more deliberate way to store electricity for later use. This listing provides 32.00kWh of usable LiFePO4 storage in a large-capacity battery system. It is designed to work as part of a properly specified low-voltage energy system, not as a standalone plug-in power station.

Battery capacity only creates value when the system can charge and discharge at useful times. With solar PV, the battery can absorb surplus generation that would otherwise be exported and make it available after sunset. With a suitable tariff, it may also charge during a lower-cost window and discharge when the property would otherwise import at a higher rate. The right choice depends on the site's half-hourly demand, inverter, tariff, export value and future loads.

What makes this model different

At 32kWh, this is a serious storage size. It should be justified by measured demand, solar export and the inverter's charge/discharge capability, not selected simply because more capacity sounds better.

• 32.00kWh usable storage: enough to make a measurable difference to evening and overnight demand when the system is correctly sized.
• LiFePO4 chemistry: a common stationary-storage chemistry selected for stability, durability and predictable operation when managed within the manufacturer's limits.
• 48V-class architecture: intended for a compatible low-voltage hybrid inverter, battery-management communications and correctly rated DC protection.
• Manufacturer installation requirements: the installation environment must still be assessed for temperature, moisture, clearance, access and fire safety.
• Modular planning: rack and stack configurations can make future capacity decisions easier, but expansion is only possible when the inverter, controls, cabling and mounting system support it.

How to decide whether 32.00kWh is right

Do not size a battery from annual electricity consumption alone. Start with the energy used after solar production falls away, especially between late afternoon and the following morning. Then compare that demand with the solar surplus available to charge the battery, the inverter's maximum charge and discharge power, and the tariff periods you can actually access.

1. Use smart-meter or inverter data to estimate typical evening and overnight demand.
2. Measure how much solar is exported on a normal day and across the seasons.
3. Check whether the proposed inverter can charge and discharge the full battery at a useful rate.
4. Model losses, export income given up, degradation, standing charges and any installation work.
5. Leave room for planned EV charging, heat-pump demand or changes in occupancy rather than buying capacity that will sit unused.

Solar, tariffs and backup use

For a solar household, the financial case usually comes from shifting surplus daytime generation into later on-site use. The saving is not the full import tariff: it should allow for the export value that the stored unit would otherwise have earned, plus conversion and battery losses. For a grid-charged system, the key number is the real difference between the cheap charging period and the avoided import period after all losses and system costs.

A battery should not be described as whole-home backup unless the inverter, changeover equipment, essential-load design and commissioning genuinely provide that function. If backup matters, ask for a written explanation of what remains powered during an outage, for how long, and what happens when the battery reaches its reserve limit.

Compatibility and professional installation

This is a battery component for a designed energy system. Confirm the exact inverter protocol, operating-voltage window, charge and discharge limits, communications cable, firmware requirements and protection equipment before purchase. Voltage alone does not prove compatibility.

• Install in the environment specified for this model: Manufacturer installation requirements is not a substitute for a site-specific assessment.
• Use correct DC isolation, over-current protection, earthing, polarity, cable sizing and torque.
• Do not connect incompatible batteries, mix chemistries or create a series arrangement unless the current manufacturer documentation explicitly allows it.
• Use a suitably qualified installer and retain the commissioning record, settings, warranty documents and proof of purchase.
• For larger stacks, confirm access routes, floor loading, cabinet or base requirements, thermal management and fire-safety arrangements before delivery.

Catalogue specification

• Usable capacity: 32.00kWh
• Chemistry: LiFePO4 for stationary energy storage
• System class: 48V-class hybrid installation
• Installation format: a large-capacity battery system
• Warranty: 6 years, subject to the manufacturer warranty terms

The product page's technical data should be read alongside the latest manufacturer datasheet and installation manual. Manufacturer specifications, supported inverter lists, warranty conditions and availability can change between batches.

What to include in a quotation

Ask for an itemised system quotation rather than comparing battery prices alone. It should state the exact battery model and quantity, inverter, cabinet or mounting arrangement, DC protection, cables, communications, commissioning, monitoring, warranty responsibilities and any electrical or DNO work. For an IP-rated or stacked system, ask where it will be installed and how the proposed enclosure, access and maintenance route meet the site requirements.

Buy with a complete system plan

We can help compare this Fogstar configuration with other capacities, estimate how much storage the property can use and request an installation quotation. Send your postcode, current solar size, inverter model, annual usage, tariff, export arrangement and any future EV or heat-pump plans. Those details let an installer recommend a useful system rather than simply the largest battery that fits the budget.

Important: this listing is for battery storage. Confirm the latest technical documentation, compatibility and warranty terms before ordering or installation.

Manufacturer source: Fogstar product specifications and warranty (checked 4 November 2026).