SimpliPHI™ ESS 4.9 kWH Battery

Click to Download PDF Product Brochure

The SimpliPHI™ 4.9 kWh Battery utilizes advanced Lithium Ferro Phosphate (LFP) chemistry to deliver more efficient, safer and reliable energy storage. Designed and built with versatility in mind, the SimpliPHI 4.9 kWh Battery seamlessly integrates with all leading inverters, making it an ideal solution for battery replacement, expansion of existing systems or as a new installation. This leading-edge power storage solution is also at the core of the Energy Storage System (ESS): the most advanced, safety- certified ESS available for homes and businesses.

Where to Buy
  • Features
  • Specifications
  • Documentation



Long battery life

10,000 cycles at 80% depth of discharge (DoD), 96% round-trip efficiency, 26.8 MWh of energy throughput, with 80% retained capacity.


No ventilation, cooling or thermal regulation required; 10-year limited warranty.1

Scalable for any energy need

Battery can scale to allow for expansion up to 358 kWh for longer-duration storage.

Versatile installation options

IP65 rating supports all weather conditions for both indoor or outdoor installations.

Flexible to pair with leading inverters

Ready to be integrated with SimpliPHI, Sol-Ark and SMA. Other inverters pending.

Validated to industry’s toughest safety standards

UL 1642, UL 1973, UN 3480 and UN DOT 38.3.

LFP battery chemistry

Provides peace of mind by reducing cobalt, risk of thermal runaway with fire propagation, operating temperature constraints and toxic coolants.

Closed-loop communication

Optimizing the inverter performance with ongoing feedback between the elements of the system.

Broad operating temperature

Ability to be used in a variety of temperature ranges.

Proven overcurrent protection

Integrated BMS and 100A DC breaker on/off switch protects the battery from overcharge and discharge, increasing safety during installation and operation.

1See operator’s manual or for complete warranty details.


SimpliPHI 4.9 kWh Battery
Battery Specifications
Model NumberSPHI-B-4.9
DC Voltage – Nominal51.2 VDC
Amp-Hours97 Ah
Rated kWh Capacity4.9 kWh DC @ 100% DOD 3.9 kWh DC @ 80% DOD
Max. Surge Discharge Rate (10 minutes)100 amps DC (5.1 kW DC)
Max. Continuous Discharge Rate48.5 amps DC (2.48 kW DC)
Max. Continuous Charge Rate48.5 amps DC (2.48 kW DC)
DC Voltage Range148 VDC to 56 VDC
Depth of Discharge1up to 100%
Charging Temperature132° to 120° F (0° to 49° C)
Operating Temperature1-4° to 140° F (-20° to 60° C)
Storage Temperature6 months: 14° to 77° F (-10° to 25° C) 3 months: -4° to 113° F (-20° to 45° C)
Self-Discharge Rate< 1% per month (when off)
Cycle Life10,000+ cycles (@ 80% DOD)
Memory EffectNone
IP RatingIP65
Warranty10 years
MountingWall-mount only
Efficiency Rating96%
CertificationsUL 1642, UL 1973, UN 3480 and UN DOT 38.3
Terminals3/8 in (10 mm)
Battery Cables4/0 Parallel Connections – Up to 4 batteries per string
Product Dimensions
Dimensions (W x H x D)/strong>23 x 28.5 x 8.5 in (30 in H w/terminals) /
3.2 ft33 (584 x 724 x 215.5 mm / 0.10 m3)
Weight160 lb (73 kg)
Wall Mount Dimensions (W x H x D)17.5 x 22.69 x .95 in (444.5 x 576.2 x 24 mm)

1Maximum operating ranges. Refer to Installation Manual for recommended conditions. All specifications listed are typical/nominal and subject to change without notice.

  • UN3480, Lithium Ion batteries, 9, II
  • Certified to UL 1973
  • UL and CE listed, UN/DOT and RoHS compliant components
  • Manufactured in the United States
  • Stay Current
    with SimpliPhi

    Subscribe to our newsletter
    for news, updates, free
    Elite IQ trainings and more.

  • This field is for validation purposes and should be left unchanged.