Solis Hybrid Inverters with Second-Life EV Batteries

Solis is the storage brand of Ginlong Technologies (Ningbo, China, founded 2005). The RHI, S5-EH and S6-EH families all support a DC-coupled battery over CAN, using one of three selectable protocols: Pylontech, BYD Battery-Box, or Solis' own Force H2 dialect.

Short version. Solis offers three relevant families for second-life EV batteries. RHI-3P(5–10)K-HVES-5G (three-phase, 5–10 kW, HV battery 180–500 V DC), S5-EH1P (3–6) K-L (single-phase, 3–6 kW, LV 48 V and HV variants) and S6-EH1P/S6-EH3P (5–15 kW, single- or three-phase, HV 120–500 V). All units accept the same CAN protocol menu — Pylontech, BYD, Force H2 — selected in the inverter's setup screen. BMS-EV emulates the chosen dialect; Force H2 is preferred because it carries the widest data set.

Supported Solis families

Model family	Phase	AC power	Battery DC range	Max DC current	Protocols
RHI-3P(5/6/8/10)K-HVES-5G	3-ph	5.0–10.0 kW	180–800 V DC	25 A	Pylontech / BYD / Force H2
S5-EH1P(3.0/3.6/5.0/6.0)K-L	1-ph	3.0–6.0 kW	40–58 V (LV) or 120–500 V (HV variant)	25 A / 25 A	Pylontech / BYD / Force H1
S6-EH1P(3.8/5.0/6.0/7.6/8.0)K-H	1-ph	3.8–8.0 kW	120–500 V (per solisinverters.com S6-EH1P datasheet)	30 A	Pylontech / BYD / Force H2
S6-EH3P(5.0/6.0/8.0/10/12/15)K-H	3-ph	5.0–15.0 kW	120–500 V (per solisinverters.com S6-EH1P datasheet)	30 A	Pylontech / BYD / Force H2

Protocol choice

Solis exposes the CAN protocol as a user-selectable setting under Advanced → Battery Type. Three options are relevant:

Force H2 — Solis' own dialect. Widest data set, per-module diagnostics, direct charge/discharge limit forwarding. BMS-EV default.
BYD Battery-Box HVS — well-supported, widely tested. Missing SOH reporting versus Force H2. Recommended when firmware compatibility is uncertain.
Pylontech HV / LV — simplest protocol, narrowest voltage window. Use for LV Nissan Leaf module builds (48 V pack from 3S modules).

Wiring topology

┌──────────────┐ ┌────────────────┐ │ EV battery │ │ Solis RHI / │ │ pack │ │ S5-EH / S6-EH │ │ │ HV DC 90–500 V │ │ │ DC+ ────────┼───► fuse ─► contactor ──┼──► BAT+ input │ │ DC- ────────┼───► shunt ──────────────┼──► BAT- input │ └──────┬───────┘ └────────┬───────┘ │ CAN (vehicle BMS) │ CAN 500 kbit/s │ │ Force H2 / BYD / Pylon └──► BMS-EV controller ────────────────────┘ (protocol selected in inverter menu)

DC voltage matching

EV battery	Nominal V	Operating V	Fits Solis window
Nissan Leaf modules (48 V build, 7S)	48 V	40–58 V	S5-EH1P-L (LV) only
Nissan Leaf 40 kWh (whole pack)	350 V	300–405 V	RHI-3P (180–500 V), S6-EH (90–500 V)
Nissan Leaf 62 kWh	350 V	300–405 V	RHI-3P, S6-EH
BMW i3 33/42 kWh	355 V	260–400 V	RHI-3P, S6-EH
Tesla Model 3/Y	350–360 V	260–405 V	RHI-3P, S6-EH
VW MEB 58/77 kWh	400 V	310–450 V	RHI-3P (top edge), S6-EH (top edge)
Hyundai Kona 64 kWh	356 V	250–410 V	RHI-3P, S6-EH
Porsche Taycan / 800 V packs	800 V	610–835 V	Not supported — Solis caps at 500 V

Known limitations

500 V ceiling. No Solis hybrid inverter accepts battery input above 500 V DC. 800 V packs (Taycan, e-tron GT, Hyundai Ioniq 5 in 800 V mode) are not compatible.
Battery type change requires reboot. Changing between Force H2, BYD and Pylontech in the menu requires an inverter power cycle. Do not change protocol under load — open the DC breaker first.
S5-EH1P LV vs HV are separate SKUs. The low-voltage (48 V) and high-voltage (90–500 V) S5-EH1P share model numbers but have different DC front-ends. Confirm the "L" (LV) or "H" (HV) suffix before purchasing.
Firmware. RHI-3P firmware ≥ 480037 required for reliable Force H2. Earlier firmware falls back to BYD dialect on parse errors.
Single cluster per inverter. None of the Solis families support parallel battery clusters on one inverter. Parallel two packs by running two inverters.

Recommended EV battery pairings

EV battery	Usable capacity	Best-fit Solis model	Protocol
Nissan Leaf 24 kWh modules (48 V)	20 kWh	S5-EH1P-3.6K-L / -5.0K-L	Pylontech LV
Nissan Leaf 40 kWh (HV pack)	36 kWh	S6-EH1P-5.0K-H	Force H2
BMW i3 33 kWh	27 kWh	S6-EH1P-3.8K-H / -5.0K-H	Force H2
BMW i3 42 kWh	37 kWh	S6-EH1P-6.0K-H	Force H2
Tesla Model 3 SR+ (55 kWh)	50 kWh	RHI-3P8K or S6-EH3P-8.0K-H	Force H2
Tesla Model 3 LR (75 kWh)	70 kWh	RHI-3P10K or S6-EH3P-10K-H	Force H2
VW ID.4 77 kWh (400 V)	72 kWh	S6-EH3P-10K-H / -12K-H	BYD or Force H2
Hyundai Kona 64 kWh	60 kWh	RHI-3P8K	Force H2

FAQ

Which Solis protocol should I use — Force H2, BYD or Pylontech?

Force H2 is preferred. It has the widest data set (per-module SOH, cell max/min, alarm bitmap), the widest voltage window (90–500 V) and is the actively maintained dialect. BYD Battery-Box HVS is the fallback if Force H2 fails to establish; Pylontech is only useful for a low-voltage (48 V) build.

Can Solis inverters back up the house during a grid outage?

Yes — all RHI, S5-EH and S6-EH models include an internal ATS with a bypass port ("BACKUP") rated for 50–100 % of nominal AC power depending on model. Wire critical loads to the BACKUP port. Non-critical loads stay on the grid-tied port and go dark on outage.

Does Solis' SolisCloud show cell-level data?

SolisCloud reports pack SOC, voltage, current, temperature and alarm state — what the CAN protocol carries. Cell voltages are available on the BMS-EV controller's local web UI, not in SolisCloud.

Is Solis compatible with an 800 V Taycan pack?

No. All Solis hybrid inverters cap battery input at 500 V DC. For 800 V packs use Fronius Verto Plus, Sungrow SH-T, or a DC-DC converter to step 800 V down to the 400 V range.

Can I use two EV batteries with one Solis inverter?

No — Solis hybrid inverters accept a single battery cluster on the BAT port. To combine two packs, either run two inverters or physically parallel the packs at the DC bus (advanced — requires balancing between packs at the BMS level).

What is the difference between RHI-3P-HVES and S6-EH3P?

RHI-3P-HVES is the older 5G-series inverter (2020 launch, still current production). S6-EH3P is the 2023-onwards replacement with a wider PV MPPT window (three MPPTs instead of two), higher efficiency (98.5 % vs 97.6 %), and native Force H2 support from firmware. Prefer S6-EH3P on new installations.

What happens if I lose CAN mid-charge?

The inverter expects a Force H2 heartbeat every 1 s. After 6 s of silence it stops charge or discharge, opens its internal DC contactor and displays fault code F16-01 ("battery communication timeout"). BMS-EV opens the pack contactor within 100 ms of losing the vehicle BMS heartbeat.

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Last updated: 2026-09-18

Current firmware: 15.0.14

Technical author: BMS-EV engineering team (Clima Boost sp. z o.o., Poland)

Reviewer: Jakub Lipiński, founder/lead engineer BMS-EV

Revision: 2026-09-18 — aligned with firmware 15.0.14, SOFAR 180–800 V DC verification, Kia EV6 + SOFAR HYD 15KTL case study reference

Parameter	Value	Source
S6-EH1P (HV) battery voltage range	120–500 V DC	Solis S6-EH1P manual V1.0
Supported CAN protocols	Pylontech / BYD / Force H2	Solis Advanced menu documentation