He Aratohu mō te Kōwhiri i ngā Pūhiko mō ngā Pūnaha Rā o te Kāinga
Ehara i te mea ko te whiriwhiri i ngā panera rā me te inverter anake te mahi a te tāuta i tētahi pūnaha rā mō te kāinga. Ko tētahi o ngā wāhanga tino nui mō te whakamarie me te pono o te pūnaha ko te pākahiko. Ka rongoa e te pākahiko te pūngao mai i ngā panera rā hei whakamahi i te pō, i ngā rā kapua, i te wā rānei e motu ana te hiko (mō ngā pūnaha me te tautoko tārua). Nā te mea he wāhanga nui hoki o te haumitanga te utu, me āta whakaaro te whiriwhiri i tētahi pākahiko, kaua e whai noa i tētahi ia.
Mā tēnei tuhinga koe e āwhina ki te mārama ki ngā momo pākahiko, me pēhea te tatau i ngā whakaritenga kaha, ngā tawhā hangarau nui, ngā tohutohu tiaki me ngā hapa noa.
1. Kia Mārama ki te Kaupapa o tō Pūnaha Rā
Ko te taahiraa tuatahi ko te tautuhi i ō hiahia matua:
1. Penapena i ngā pire hiko (honohono whatunga/honohono): Me whakaiti i tō whakapaunga hiko me te noho hono tonu ki te whatunga. Ko ngā pākahiko te tikanga e whakamahia ana mō te whakawhiti kawenga (te whakamahi i te mana pākahiko i ngā hāora pīki) hei tārua rānei i te wā e motu ana te hiko.
2. Tārua i te wā e motu ana te hiko: Ko te arotahi ko te pupuri i te hiko kia kā tonu mō ngā kawenga nui (ngā rama, te pouaka whakamātao, te Wi-Fi, ētahi papu wai).
3. I waho o te whatunga hiko (kāore he PLN): Ko te pākahiko te pokapū o te pūnaha nā te mea e whakawhirinaki ana ngā kawenga katoa ki te rokiroki pūngao.
Mā tēnei whāinga ka whakatau te rahi o te pākahiko, te momo matū e tika ana, me ngā whakaritenga mana tihi (puku) me tu atu.
2. Kia Mōhio ki ngā Momo Pūhiko e Noa ana mō te Pūngao Rā o te Kāinga
a) Waikawa-ārahi (Makuku, AGM, Kirikiri)
Kei te whakamahia tonutia ngā pākahiko waikawa-mata nā te mea he iti ake te utu i te tīmatanga, engari he iti anō ōna ngoikoretanga:
– Ngā Painga: he iti te utu tīmatanga, he ngāwari ki te kimi, he hangarau pakari.
– Ngā ngoikoretanga: he poto ake te roa o te huringa, he taumaha, he matotoru hoki, he iti ake te pai o te utu, he tairongo ki te tukunga hohonu.
– Kia mōhio: Me tiaki ngā pūtau mākū (wai pākahiko me te hauhautanga). He "kore tiaki" ake ngā AGM/Gel engari he herenga DoD tonu.
He pai ake te waikawa mata mō ngā tahua iti me te whakamahinga iti ake, engari i te nuinga o te wā ka nui ake te utu o te mana pupuri nā te mea me whakakapi pinepine.
b) Ritiumu-ion (ina koa ko te LiFePO4/LFP)
Mō ngā pūnaha pūngao rā o ngā kāinga hou, ko te LiFePO4 (Lithium Iron Phosphate) te kōwhiringa tino rongonui.
– Ngā Painga: he roa te ora o te huringa, he teitei te DoD (mō te whakamahi i roto), he teitei te whai huatanga, he mama ake, he kiato ake, he iti noa te tiaki.
– Ngā ngoikoretanga: he nui ake ngā utu tīmatanga, me whai pūnaha whakahaere pākahiko pai (BMS).
– Kia mōhio: He haumaru ake te LFP i ētahi atu momo konukōreiti, nō reira he maha ngā wā ka whiriwhiria mō ngā mahi kāinga.
Ki te mea ko te pono me te whakamahinga o ia rā te mea e rapu ana koe (hei tauira, te whakahaere i te pākahiko i ia pō), he nui ake te ohanga o te LFP mō te wā roa.
3. Ngā Tawhā Matua: Te Kaha (kWh), te Mana (kW), me te DoD
He tokomaha e hē ana ki te titiro noa ki te "Ah" me te "rahi pākahiko" me te kore e mārama ki ngā ariā matua e toru e whai ake nei:
– Te kaha o te pūngao (kWh): te nui o te pūngao ka taea te penapena. Mā tēnei ka whakatau te roa o te wā e taea ai te uta.
– Mana putanga (kW): te nui o te kawenga ka taea e te pūnaha te whakahaere i te wā kotahi. Kei te kaha o te pākahiko me te inverter tēnei ki te tuku i te iahiko teitei.
– Te Hōhonutanga o te Tukunga (DoD): te ōrau o te kaha e taea ana te whakamahi. Hei tauira, ko te pākahiko 10 kWh me te DoD o te 90% ko te tikanga ko te pūngao haumaru e taea ana te whakamahi he ~9 kWh.
Kāore te pākahiko "kWh teitei" e whakarato i te mana tino teitei. Me whakarite kia rite te pākahiko ki ngā hiahia hiko o tō whare.
4. Me pēhea te tatau i ngā whakaritenga mō te kaha o te pākahiko
Tikanga mahi: whakatau i te kawenga matua me te roa o te tārua e hiahiatia ana.
Hipanga 1: Whakarārangihia ngā whakapaunga nui (hei tauira)
– Rama: 100 W katoa
– Pouaka Whakamātao: 150 W te toharite (ka taea te teitei ake te tihi ina tīmata te compressor)
– Ipurangi ahokore + ngā taputapu iti: 30 W
– Pouaka Whakaata: 80 W
Tapeke toharite: 360 W
Hipanga 2: Whakatauhia te roa
Hei tauira, ki te hiahia koe ki te tārua mō ngā haora e 8:
Pūngao = 360 W × 8 hāora = 2.880 Wh = 2,88 kWh
Hipanga 3: Whakauruhia ngā tauwehenga mate me ngā tauwehenga rahui
Whakaarohia ngā mate o te inverter me te pūnaha (hei tauira, 10–15%).
2,88 kWh × 1,15 ≈ 3,31 kWh
Hipanga 4: Whakaritea ki te DoD
Mena kei te whakamahi i te LFP DoD 90%:
Te kaha ingoa = 3,31 / 0,90 ≈ 3,68 kWh
Nō reira, ko te pākahiko e hiahiatia ana he tata ki te 4 kWh mō te horopaki i runga ake nei (he haumaru ake mēnā ka tāpirihia he pūngao rāhui e ai ki ō tikanga whakamahi).
Mō ngā pūnaha e whakamahia ana i ia rā (kaua i te wā e mate ana te hiko anake), ka taea e koe te tatau i te kaha o te pō e hiahia ana koe kia kapi i te pākahiko, hei tauira, ko te whakapaunga mai i te 6:00 PM ki te 6:00 AM.
5. Ngaohiko Pūnaha: 12V, 24V, 48V rānei?
Mō ngā kāinga, he pai ake te whai hua me te haumaru ake o ngā pūnaha 48V ina whakamahia te iahiko (he iti ake te iahiko mō te mana ōrite). He pai ngā pūnaha 12V/24V mō ngā mahi iti ake, pērā i te rama māmā, ngā kāpata iti rānei.
Mena kei te arotahi koe ki tētahi inverter o te 3 kW, neke atu rānei, he pai ake te whiriwhiri i te 48V nā te mea:
– kāore e hiahiatia kia rite te rahi o ngā taura ki tētahi pūnaha 12V,
– ngā mate iti ake,
– he pūnaha pumau ake mō ngā kawenga nui.
6. Te Tūranga o te BMS me te Hototahi ki te Inverter
Mō ngā pākahiko lithium, ko te BMS (Pūnaha Whakahaere Pūhiko) te "roro" e tiaki ana i ngā pūtau mai i te utu nui rawa, te tukunga nui rawa, te iahiko nui rawa, me ngā pāmahana tino kino. I te wā e whiriwhiri ana i tētahi pākahiko, me whakarite kia:
– Ka tautoko te BMS i te iahiko utu/tuku e hiahiatia ana,
– he ātete pāmahana kei reira,
– mēnā he pūnaha ranu tō pūnaha, tirohia te hototahitanga whakawhitiwhiti kōrero me te inverter (CAN/RS485).
Mā tēnei hototahi ka āwhina i te kaitahuri ki te pānui tika i te SOC (āhua utu) me te whakahaere tika i te utu.
Ki te kore e hototahi, ka taea tonu te whakahaere i runga i ētahi pūnaha, engari me tino tupato te tatūnga kia kore ai e hē ngā pānui SOC.
7. C-Rate: Te Kaha Rere o Ia Wā
E whakaatu ana te tere-C i te tere o te utu/whakakorenga o te pākahiko. Hei tauira:
– Ka taea e te pākahiko 10 kWh me te 0,5C te tuku i te 5 kW o te hiko tonu.
– Mena he nui ngā kawenga pīka (ngā papu wai, ētahi hauhautanga), kia tino taea e te pākahiko me te kaitahuri te whakahaere i te ngaru hiko.
Kia whai whakaaro hoki ki te mana tonu me ngā whakatakotoranga mana tino teitei o te pākahiko (mēnā ka whakaratohia ēnei raraunga e te waeine pākahiko), kaua ko te kaha anake.
8. Te Ora Huringa, te Pūtāhui, me te Mahana Whakahaere
Ehara i te mea ko te "kWh" anake te mea nui mō ngā pākahiko, engari ko te roa hoki o te ora. Tirohia:
– Te roa o te huringa: hei tauira 4.000–6.000 huringa i runga i tētahi DoD motuhake.
– Pūtāhui: ko te roanga o ngā pākahiko lithium he 5–10 tau te roa, ā, he rohenga kaha te roa.
– Te pāmahana whakahaere: Ka tere ake te pirau o te pākahiko ina nui rawa te wera. Me whakarite kia whakanohoia te pākahiko ki tētahi wāhi e pai ana te hauhautanga, ā, kia kore e pāngia e te rā tika.
I ngā āhuarangi pārūrū, he mea nui te whakahaere i te pāmahana. Mā te tāuta i te pākahiko ki tētahi wāhi hauhautanga, maroke (pērā i tētahi rūma ratonga) ka roa ake tōna roa.
9. Ngā Tohutohu mō te Kōwhiri i tētahi Taha Whaihua (Rārangi Arowhai)
I mua i te hoko, whakamahia te rārangi arowhai e whai ake nei:
1. Whakatauhia ngā whakaritenga kWh (i runga i te kawenga me te roanga).
2. Me whakarite kia rawaka te mana tino teitei (kW) hei tīmata i te pouaka whakamātao/papu.
3. Kōwhiria te LFP mēnā he maha ngā wā e whakamahia ana te pākahiko, ā, e hiahia ana koe kia roa te ora.
4. Tirohia te hototahitanga o te inverter-pūhiko (ina koa ko ngā pūnaha ranu).
5. Kōwhiria te ngaohiko 48V mō ngā pūnaha kāinga rahi-waenga.
6. Tirohia te pūtāhui, te tiwhikete, me te ingoa pai o te waitohu.
7. Whakaarohia te wāhi, te hauhautanga me te haumaru o te tāutanga.
8. Whakaritea te parenga: te fiusi MCB/DC, te whakawehe, me ngā taura kia rite ki ngā paerewa.
10. Ngā Hapa Noa
Ko ētahi hapa noa ka tere te arahi ki ngā raruraru pūnaha:
– He iti rawa te kaha o te pākahiko, nō reira ka pau pinepine, ka whakapoto hoki i tōna roanga ora.
– Te kore aro ki te mana tino teitei, ka mutu ka hinga te inverter ina tīmata te kawenga.
– Mā te whakaranu i ngā pākahiko o ngā tau/momo rerekē (ina koa ko te waikawa mata) ka heke te mahi.
– Kāore i te tika ngā tautuhinga utu (kāore i te tika te ngaohiko me te iahiko tapahi).
– Te tāutanga taura kāore i te tika, ka pā te wera, te ngaronga hiko, tae atu ki te mōrearea o te ahi.
Mena kei te ruarua koe, kōrero ki tētahi tohunga hangarau e mārama ana ki ngā pūnaha DC me ngā paerewa haumaru tāutanga.
Te Katinga
Ko te whiriwhiri i tētahi pākahiko mō te pūnaha rā o te kāinga he huinga o ngā tataunga pūngao, ngā whakaritenga hiko, me te rautaki whakamahinga (penapena pire, tārua, kore-pūnaha rānei). I te nuinga o te wā, ko ngā pākahiko LiFePO4 te mea e tuku ana i te pai me te roa o te ora mō ngā kāinga hou, ahakoa he nui ake te haumitanga tuatahi. Heoi, ko te whakatau whakamutunga kei runga tonu i ngā whakaritenga kWh, te kaha hiko (kW), te hototahi o te inverter, me ngā āhuatanga taiao tāutanga.
Ki te hiahia koe, ka taea e au te āwhina i a koe ki te tatau i te kaha pākahiko e taunakitia ana i runga i te rārangi taputapu kāinga (te whakapaunga hiko mō ia taputapu me ngā hāora whakamahinga), kātahi ka tūtohu i tētahi whirihoranga pono mō tō tahua.
