Pytes V5
#6 in Server rackFull review
A fully UL-listed, heated 5 kWh rack module for permitted home installs. It’s worth the premium when your inspector wants UL 9540.
Signature Solar $1,450$1,450
4.1/5
Pytes’ second-generation V5, adding a breaker, Wi-Fi and fire suppression. Worth seeking out for a code-compliant rack system once US stock appears.
- 5.1 kWhCapacity
- 75 AOutput
- 6,000Cycles
- YesUL 9540A
- 10 yearsWarranty
See it at Pytes
No store we check sells it online; the maker lists where to buy or who installs it.
Older model: this replaces the Pytes V5 (rated 4.4). See every Pytes generation.
Pros
- UL 9540 Ed. 3, UL 9540A and UL 1973 listed for permitted installs
- Built-in breaker, pre-charge and aerosol fire suppression add safety layers
- Heater and built-in Wi-Fi monitoring come standard
- Standard 19-inch rack width
Cons
- Hard to find at US retailers so far
- Pytes doesn’t publish a maximum continuous current, only 75 A recommended
How it scores
The rating comes from 6 measured or published factors, each scored 0-100 against fixed reference points for its case. How we rank explains each one.
Specifications
| Model number | V5°α Plus |
|---|---|
| Capacity | |
| Case | Server rack (19-inch) |
| Nominal voltage | 51.2 V |
| Capacity | 100 Ah |
| Energy | 5.1 kWh |
| Chemistry | LiFePO4 |
| Cycle life | 6,000 |
| Power | |
| Continuous discharge | 75 A |
| Modules in parallel | Up to 96 |
| Safety and communication | |
| UL 1973 | Yes |
| UL 9540A | Yes |
| UL 9540 | Yes |
| Communication | CAN, RS485, RS232, dry contact, Wi-Fi |
| Works with inverters | Victron, Sol-Ark, EG4, LuxPower, Growatt, Deye, SMA, Solis, Studer, Voltronic |
| Self-heating | Yes |
| App | Yes |
| Build | |
| Built-in breaker | Yes |
| Enclosure | IP20 |
| Dimensions | 19.1 x 22.8 x 5.5 in |
| Weight | 100 lb |
| Warranty | 10 years |
| Released | 2025-10 |
Alternatives in this case
Rich Solar Alpha 5 Pro
#7 in Server rackFull review
For DIY solar owners who want a rack battery with an app, heater and wide inverter support in one box. It costs a bit more than the budget leaders but needs no add-ons.
Amazon $1,799.99$1,799.99
ECO-WORTHY Cubix100 Pro
#9 in Server rackFull review
A cold-tolerant 5 kWh rack module with a screen, for off-grid builds in unheated spaces. Choose the Cubix100 instead if your permit needs a UL listing.
Amazon $1,099.99 ECO-WORTHY $1,099.99$1,099.99
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