Sunny Island 4548-US / 6048-US

ID: prod:sma-sunny-island-us
IRI: https://solarlattice.org/kb/prod/sma-sunny-island-us
Status: active
Also known as: Sunny Island US, SI 4548 US, SI 6048 US, SI 4548-US-10, SI 6048-US-10, SI 4548/6048-US
Category: Inverters
Make: sma
Product level: family

The Sunny Island 4548-US and 6048-US are SMA battery inverters; the operating manual applies to models SI 4548-US-10 and SI 6048-US-10 as of firmware version 7.3. Both models reach a maximum efficiency of 96%, with CEC weighted efficiency of 94.5% for the 4548-US and 94.0% for the 6048-US. Efficiency stays above 90% from 5% to 120% of nominal power. Galvanically insulated RS485 communication is available as an option. Within a cluster, a communication interface links the master unit to the slave units. For more output, up to four clusters can be combined into a Multicluster system. This needs the Multicluster Box MCB-12U and a Multicluster Piggy-Back fitted in the external communication slot.

<!-- review notes

sentence 6: support check: partial - Up to four clusters, MCB-12U required and MC-PB plugged into external communication slot are stated, but passage doesn't explicitly say the Piggy-Back is required for Multicluster, only how it's installed. -->

Claims

`manufactured_by`

c1 drafted · lead SMA

sixx-20-us-commissioning sec=front h=0e5700fcb4b6
sixx-20-us-led-signals sec=front h=85b2c477ff9f

`efficiency`

c2 verified · fact nominal 96 PERCENT

Conditions: Maximum efficiency, SI 4548-US-10

SI4548-6048-US-BE-en-21W tbl=159 h=499768f9e93c
SI4548-6048-US-BE-en-21W tbl=159.r1 h=fbbba79b245a

verified by: review-workflowverified on: 2026-10-24review note: possible conflict with c3 (same source; check the conditions); possible conflict with c6 (same source; check the conditions)

c3 drafted · lead nominal 94.5 PERCENT

Conditions: CEC weighted efficiency, SI 4548-US-10

SI4548-6048-US-BE-en-21W tbl=159 h=499768f9e93c
SI4548-6048-US-BE-en-21W tbl=159.r3 h=ca0562e71f4f

review note: possible conflict with c2 (same source; check the conditions); possible conflict with c5 (same source; check the conditions); possible conflict with c6 (same source; check the conditions)

c4 drafted · lead ≥ 90 PERCENT

Conditions: SI 4548-US-10, over 5% Pnom to 120% Pnom

SI4548-6048-US-BE-en-21W tbl=159 h=499768f9e93c
SI4548-6048-US-BE-en-21W tbl=159.r2 h=17eca6a6e174

c5 drafted · lead nominal 96 PERCENT

Conditions: Maximum efficiency, SI 6048-US-10

SI4548-6048-US-BE-en-21W tbl=163 h=4db8cc99f6f1
SI4548-6048-US-BE-en-21W tbl=163.r1 h=f207f284e149

review note: possible conflict with c3 (same source; check the conditions); possible conflict with c6 (same source; check the conditions)

c6 drafted · lead nominal 94 PERCENT

Conditions: CEC weighted efficiency, SI 6048-US-10

SI4548-6048-US-BE-en-21W tbl=163 h=4db8cc99f6f1

review note: possible conflict with c2 (same source; check the conditions); possible conflict with c3 (same source; check the conditions); possible conflict with c5 (same source; check the conditions)

c7 verified · fact ≥ 90 PERCENT

Conditions: SI 6048-US-10, over 5 to 120% Pnom

SI4548-6048-US-BE-en-21W tbl=163 h=4db8cc99f6f1
SI4548-6048-US-BE-en-21W tbl=163.r2 h=35a2d6e3b672

verified by: review-workflowverified on: 2026-10-24

`uses_protocol`

c8 drafted · lead RS-485

Galvanically insulated RS485 communication is optional.

SI4548-6048-US-BE-en-21W tbl=161.r8 h=f3af70b11a05

`requires`

c9 drafted · lead SMA Multicluster-Box

Multicluster Box MCB-12U is needed when clusters are combined into a Multicluster system.

SI4548-6048-US-BE-en-21W sec=16.1 h=adb5b04fd881

review note: support check: partial - MCB-12U is required for Multicluster systems, but not for every unit; 'requires' is conditional on multicluster use, which the note captures roughly.

`compatible_with`

c10 verified · fact Battery inverter cluster

Each cluster has a master connected to slaves over a communication interface.

SI4548-6048-US-BE-en-21W sec=16.1 h=adb5b04fd881

verified by: review-workflowverified on: 2026-10-24review note: support check: partial - Passage describes clusters with master and slaves, but compatibility with a battery inverter cluster architecture is implied rather than stated.

Referenced by

SMA SI-US E101 applies_to c2
SMA SI-US E102 applies_to c2
SMA SI-US E103 applies_to c2
SMA SI-US E104 applies_to c4
SMA SI-US E105 applies_to c4
SMA SI-US E106 applies_to c4
SMA SI-US E107 applies_to c3
SMA SI-US E108 applies_to c3
SMA SI-US E110 applies_to c5
SMA SI-US E115 applies_to c2
SMA SI-US E118 applies_to c2
SMA SI-US E119 applies_to c3
SMA SI-US E120 applies_to c4
SMA SI-US E121 applies_to c3
SMA SI-US E122 applies_to c3
SMA SI-US E129 applies_to c3
SMA SI-US E130 applies_to c5
SMA SI-US E131 applies_to c3
SMA SI-US E132 applies_to c3
SMA SI-US E202 applies_to c3
SMA SI-US E203 applies_to c3
SMA SI-US E204 applies_to c3
SMA SI-US E205 applies_to c3
SMA SI-US E206 applies_to c3
SMA SI-US E207 applies_to c3
SMA SI-US E221 applies_to c3
SMA SI-US E222 applies_to c3
SMA SI-US E223 applies_to c3
SMA SI-US E401 applies_to c3
SMA SI-US E402 applies_to c3
SMA SI-US E403 applies_to c3
SMA SI-US E404 applies_to c3
SMA SI-US E405 applies_to c3
SMA SI-US E406 applies_to c3
SMA SI-US E407 applies_to c3
SMA SI-US E408 applies_to c3
SMA SI-US E501 applies_to c3
SMA SI-US E502 applies_to c3
SMA SI-US E503 applies_to c3
SMA SI-US E504 applies_to c3
SMA SI-US E505 applies_to c3
SMA SI-US E506 applies_to c3
SMA SI-US E507 applies_to c3
SMA SI-US E508 applies_to c3
SMA SI-US E601 applies_to c3
SMA SI-US E602 applies_to c3
SMA SI-US E603 applies_to c3
SMA SI-US E604 applies_to c3
SMA SI-US E605 applies_to c3
SMA SI-US E606 applies_to c3
SMA SI-US E607 applies_to c3
SMA SI-US E608 applies_to c3
SMA SI-US E609 applies_to c3
SMA SI-US E610 applies_to c4
SMA SI-US E611 applies_to c4
SMA SI-US E612 applies_to c4
SMA SI-US E613 applies_to c4
SMA SI-US E614 applies_to c4
SMA SI-US E615 applies_to c4
SMA SI-US E616 applies_to c4
SMA SI-US E617 applies_to c3
SMA SI-US E618 applies_to c3
SMA SI-US E619 applies_to c3
SMA SI-US E620 applies_to c3
SMA SI-US E621 applies_to c3
SMA SI-US E622 applies_to c3
SMA SI-US E623 applies_to c3
SMA SI-US E624 applies_to c3
SMA SI-US E625 applies_to c3
SMA SI-US E626 applies_to c3
SMA SI-US E627 applies_to c3
SMA SI-US E628 applies_to c3
SMA SI-US E629 applies_to c3
SMA SI-US E630 applies_to c3
SMA SI-US E631 applies_to c3
SMA SI-US E632 applies_to c3
SMA SI-US E705 applies_to c2
SMA SI-US E706 applies_to c3
SMA SI-US E707 applies_to c3
SMA SI-US E708 applies_to c3
SMA SI-US E709 applies_to c3
SMA SI-US E710 applies_to c3
SMA SI-US E711 applies_to c3
SMA SI-US E712 applies_to c3
SMA SI-US E851 applies_to c3
SMA SI-US E852 applies_to c3
SMA SI-US E853 applies_to c3
SMA SI-US E854 applies_to c3
SMA SI-US E901 applies_to c3
SMA SI-US E902 applies_to c3
SMA SI-US E903 applies_to c2
SMA SI-US E904 applies_to c2
SMA SI-US E905 applies_to c4
SMA SI-US F109 applies_to c3
SMA SI-US F113 applies_to c5
SMA SI-US F117 applies_to c4
SMA SI-US F121 applies_to c3
SMA SI-US F141 applies_to c3
SMA SI-US F158 applies_to c4
SMA SI-US F201 applies_to c4
SMA SI-US F206 applies_to c3
SMA SI-US F208 applies_to c4
SMA SI-US F213 applies_to c4
SMA SI-US F221 applies_to c4
SMA SI-US F314 applies_to c4
SMA SI-US F605 applies_to c5
SMA SI-US F702 applies_to c3
SMA SI-US F703 applies_to c3
SMA SI-US F704 applies_to c5
SMA SI-US F706 applies_to c3
SMA SI-US F710 applies_to c3
SMA SI-US F716 applies_to c4
SMA SI-US F720 applies_to c5
SMA SI-US F721 applies_to c5
SMA SI-US F731 applies_to c4
SMA SI-US F732 applies_to c4
SMA SI-US F733 applies_to c4
SMA SI-US F739 applies_to c4
SMA SI-US F743 applies_to c4
SMA SI-US F754 applies_to c4
SMA SI-US F758 applies_to c4
SMA SI-US F781 applies_to c5
SMA SI-US F782 applies_to c4
SMA SI-US F783 applies_to c4
SMA SI-US F801 applies_to c5
SMA SI-US F806 applies_to c4
SMA SI-US F809 applies_to c5
SMA SI-US F810 applies_to c5
SMA SI-US F811 applies_to c5
SMA SI-US F816 applies_to c5
SMA SI-US F817 applies_to c5
SMA SI-US F818 applies_to c5
SMA SI-US F890 applies_to c4
SMA SI-US F891 applies_to c4
SMA SI-US F892 applies_to c4
SMA SI-US F893 applies_to c4
SMA SI-US F920 applies_to c3
SMA SI-US F921 applies_to c4
SMA SI-US F922 applies_to c4
SMA SI-US F923 applies_to c4
SMA SI-US F924 applies_to c4
SMA SI-US F925 applies_to c4
SMA SI-US F926 applies_to c4
SMA SI-US F927 applies_to c4
SMA SI-US F928 applies_to c4
SMA SI-US F929 applies_to c3
SMA SI-US F930 applies_to c4
SMA SI-US F931 applies_to c4
SMA SI-US F932 applies_to c4
SMA SI-US F935 applies_to c4
SMA SI-US F952 applies_to c4
SMA SI-US W110 applies_to c5
SMA SI-US W111 applies_to c5
SMA SI-US W112 applies_to c5
SMA SI-US W114 applies_to c5
SMA SI-US W115 applies_to c5
SMA SI-US W116 applies_to c5
SMA SI-US W118 applies_to c4
SMA SI-US W119 applies_to c4
SMA SI-US W120 applies_to c4
SMA SI-US W122 applies_to c4
SMA SI-US W123 applies_to c4
SMA SI-US W124 applies_to c4
SMA SI-US W137 applies_to c8
SMA SI-US W138 applies_to c8
SMA SI-US W139 applies_to c8
SMA SI-US W140 applies_to c8
SMA SI-US W142 applies_to c4
SMA SI-US W143 applies_to c4
SMA SI-US W144 applies_to c4
SMA SI-US W159 applies_to c4
SMA SI-US W160 applies_to c4
SMA SI-US W161 applies_to c4
SMA SI-US W202 applies_to c4
SMA SI-US W203 applies_to c4
SMA SI-US W204 applies_to c4
SMA SI-US W209 applies_to c4
SMA SI-US W210 applies_to c4
SMA SI-US W211 applies_to c4
SMA SI-US W212 applies_to c4
SMA SI-US W220 applies_to c4
SMA SI-US W309 applies_to c3
SMA SI-US W310 applies_to c3
SMA SI-US W311 applies_to c3
SMA SI-US W312 applies_to c3
SMA SI-US W315 applies_to c4
SMA SI-US W316 applies_to c4
SMA SI-US W317 applies_to c4
SMA SI-US W318 applies_to c4
SMA SI-US W319 applies_to c4
SMA SI-US W320 applies_to c4
SMA SI-US W321 applies_to c5
SMA SI-US W322 applies_to c5
SMA SI-US W323 applies_to c5
SMA SI-US W324 applies_to c5
SMA SI-US W325 applies_to c5
SMA SI-US W326 applies_to c5
SMA SI-US W327 applies_to c5
SMA SI-US W328 applies_to c5
SMA SI-US W329 applies_to c5
SMA SI-US W330 applies_to c5
SMA SI-US W331 applies_to c5
SMA SI-US W332 applies_to c5
SMA SI-US W333 applies_to c5
SMA SI-US W334 applies_to c5
SMA SI-US W335 applies_to c5
SMA SI-US W336 applies_to c5
SMA SI-US W337 applies_to c5
SMA SI-US W338 applies_to c5
SMA SI-US W339 applies_to c5
SMA SI-US W340 applies_to c5
SMA SI-US W341 applies_to c5
SMA SI-US W342 applies_to c5
SMA SI-US W343 applies_to c4
SMA SI-US W344 applies_to c4
SMA SI-US W345 applies_to c3
SMA SI-US W346 applies_to c3
SMA SI-US W347 applies_to c4
SMA SI-US W348 applies_to c4
SMA SI-US W349 applies_to c4
SMA SI-US W350 applies_to c4
SMA SI-US W351 applies_to c4
SMA SI-US W352 applies_to c4
SMA SI-US W353 applies_to c4
SMA SI-US W354 applies_to c4
SMA SI-US W377 applies_to c4
SMA SI-US W378 applies_to c4
SMA SI-US W379 applies_to c4
SMA SI-US W380 applies_to c4
SMA SI-US W401 applies_to c5
SMA SI-US W402 applies_to c5
SMA SI-US W501 applies_to c5
SMA SI-US W502 applies_to c5
SMA SI-US W503 applies_to c5
SMA SI-US W504 applies_to c5
SMA SI-US W505 applies_to c4
SMA SI-US W506 applies_to c4
SMA SI-US W507 applies_to c4
SMA SI-US W508 applies_to c4
SMA SI-US W606 applies_to c5
SMA SI-US W607 applies_to c5
SMA SI-US W608 applies_to c5
SMA SI-US W705 applies_to c4
SMA SI-US W707 applies_to c3
SMA SI-US W708 applies_to c3
SMA SI-US W709 applies_to c3
SMA SI-US W713 applies_to c4
SMA SI-US W717 applies_to c4
SMA SI-US W718 applies_to c4
SMA SI-US W719 applies_to c4
SMA SI-US W722 applies_to c5
SMA SI-US W723 applies_to c5
SMA SI-US W724 applies_to c4
SMA SI-US W725 applies_to c4
SMA SI-US W726 applies_to c4
SMA SI-US W734 applies_to c4
SMA SI-US W735 applies_to c4
SMA SI-US W736 applies_to c4
SMA SI-US W738 applies_to c3
SMA SI-US W740 applies_to c4
SMA SI-US W741 applies_to c4
SMA SI-US W742 applies_to c4
SMA SI-US W744 applies_to c4
SMA SI-US W745 applies_to c4
SMA SI-US W746 applies_to c4
SMA SI-US W747 applies_to c5
SMA SI-US W748 applies_to c5
SMA SI-US W749 applies_to c5
SMA SI-US W750 applies_to c5
SMA SI-US W751 applies_to c5
SMA SI-US W752 applies_to c5
SMA SI-US W753 applies_to c4
SMA SI-US W755 applies_to c4
SMA SI-US W756 applies_to c4
SMA SI-US W757 applies_to c4
SMA SI-US W759 applies_to c4
SMA SI-US W760 applies_to c4
SMA SI-US W761 applies_to c4
SMA SI-US W784 applies_to c4
SMA SI-US W785 applies_to c4
SMA SI-US W786 applies_to c4
SMA SI-US W791 applies_to c5
SMA SI-US W792 applies_to c5
SMA SI-US W793 applies_to c5
SMA SI-US W797 applies_to c4
SMA SI-US W798 applies_to c4
SMA SI-US W799 applies_to c4
SMA SI-US W804 applies_to c4
SMA SI-US W805 applies_to c5
SMA SI-US W807 applies_to c4
SMA SI-US W808 applies_to c5
SMA SI-US W815 applies_to c5
SMA SI-US W824 applies_to c5
SMA SI-US W851 applies_to c5
SMA SI-US W852 applies_to c4
SMA SI-US W853 applies_to c5
SMA SI-US W854 applies_to c5
SMA SI-US W855 applies_to c5
SMA SI-US W856 applies_to c5
SMA SI-US W857 applies_to c5
SMA SI-US W861 applies_to c6
SMA SI-US W862 applies_to c5
SMA SI-US W863 applies_to c5
SMA SI-US W864 applies_to c5
SMA SI-US W865 applies_to c5
SMA SI-US W866 applies_to c5
SMA SI-US W867 applies_to c5
SMA SI-US W871 applies_to c6
SMA SI-US W872 applies_to c5
SMA SI-US W873 applies_to c6
SMA SI-US W874 applies_to c5
SMA SI-US W875 applies_to c5
SMA SI-US W876 applies_to c5
SMA SI-US W877 applies_to c5
SMA SI-US W881 applies_to c5
SMA SI-US W882 applies_to c5
SMA SI-US W883 applies_to c6
SMA SI-US W884 applies_to c5
SMA SI-US W885 applies_to c5
SMA SI-US W886 applies_to c5
SMA SI-US W887 applies_to c5
SMA SI-US W915 applies_to c3
SMA SI-US W936 applies_to c3
SMA SI-US W937 applies_to c4
SMA SI-US W938 applies_to c4
SMA SI-US W939 applies_to c4
SMA SI-US W940 applies_to c4
SMA SI-US W941 applies_to c4
SMA SI-US W942 applies_to c4
SMA SI-US W943 applies_to c4
SMA SI-US W944 applies_to c4
SMA SI-US W945 applies_to c4
SMA SI-US W946 applies_to c4
SMA SI-US W947 applies_to c4
SMA SI-US W948 applies_to c4
SMA SI-US W951 applies_to c3
SMA SI-US W953 applies_to c4
Frequency-shift power control requires c2
SMA Multicluster-Box compatible_with c2

Sunny Island 4548-US / 6048-US

Claims

manufactured_by

efficiency

uses_protocol

requires

compatible_with