AmpliPHI 3.8kWh Battery Installation Manual

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Table Of Contents

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3.0 – Pre-Installation

3.1 – AmpliPHI Battery Performance

AmpliPHI Batteries do not need to be de-rated unless running continuously at more than 90% capacity. To

achieve the greatest cycle life of 10,000 cycles, AmpliPHI Batteries are typically operated at 80% maximum

Depth of Discharge.

Due to the AmpliPHI Battery’s internal self-protection mechanisms, the battery will not charge when internal

battery temperatures are below 32° F (0° C), will not discharge when internal temperatures are below -4° F

(-20° C), and will not charge or discharge when internal temperatures exceed 158° F (70° C). When connected

to an approved inverter, the AmpliPHI battery will automatically curtail charge rates to 20A when the

internal temperature drops between 32° - 44.6° F (0° - 7° C). The battery will continue to charge at reduced

rates of 3A from 14° - 32° F(-10° - 0°C) and 1A from -4° - 14° F (-20° - 10° C). Strategies such as proper

insulation of battery enclosure and/or capture of residual heat from other power electronics within the

enclosure can mitigate temperature concerns in cold climates.

All AmpliPHI Batteries are balanced during final production and testing stages. Following proper wiring

guidelines ensures that a system will not require any manual balancing processes.

3.2 – AmpliPHI Battery System Sizing

AmpliPHI Batteries are designed to operate at the continuous ratings specified in Table 1.0 – AmpliPHI Battery

Specifications. AmpliPHI batteries with communications, when paired with an approved inverter will enable

proper settings for any size battery bank up to 40 battery modules. Settings also specified in Table 1.0 will be

automatically communicated to the inverter. Battery bank sizes larger than 40 battery modules are not

supported as sufficient communications to the inverter and between the batteries cannot be achieved.

AmpliPHI battery banks larger than 40 battery modules potentially causes damage to the

AmpliPHI batteries and Voids the Warranty.

3.2.1 – Sizing for All Systems

AmpliPHI batteries in DC Coupled or AC Coupled Systems should be sized according to the connected

loads’ energy (kWh) and power (kW) requirements. While as few as one AmpliPHI battery may be

paired with compatible equipment without voiding the battery warranty, consider that the AmpliPHI

battery is rated according to the specifications listed in Table 1.0 above, and that, without a backup AC

power source, loads that exceed the battery bank’s total capacity or power rating will result in the

entire system shutting down. For additional system sizing recommendations, refer to Section 3.2 in the

standard PHI Battery Installation Manual

3.2.2 – Additional Sizing Considerations for AC Coupled Systems

In an AC Coupled system, significantly limiting the solar array’s charging power does not work well. In

addition, because the solar charging cycle in an AC coupled system will frequently have minimal absorb

time, the level of charge achievable with a full absorb is not equivalent to the battery’s 100% SoC. This

effect is less significant at slower charging rates. Therefore, SimpliPhi recommends sizing a larger

battery bank relative to the AC Coupled PV array. In the below AC Coupling example, the batteries’

typical maximum continuous charge rate is multiplied by a de-rate factor of 0.8.

The charge calculation uses the nomenclature below:

• Battery maximum continuous charge rate (kW

) = Bat

(typically @ C/2)

= (maximum battery charge current × battery voltage nominal)

• PV charge maximum = PV

REV202203161200

CAUTION: An AmpliPHI Battery bank cannot exceed 40 modules per bank. Sizing